6^th Global Experts Meeting on Nanomaterials and Nanotechnology April 21-23, 2016 Dubai, UAE

Biography:

Ranjith R Unnithan is Lecturer of Electrical and Electronic Engineering at The University of Melbourne. Ranjith finished his PhD in Electrical Engineering from the University of Cambridge in 2011. After finishing his PhD, he worked as a postdoctoral researcher and project manager in the Electrical Engineering Department at Cambridge for a Samsung project. He joined at the University of Melbourne as a lecturer in 2014. He is recipient of a number of awards; including CambridgeSens innovation awards both in 2009 and 2010 and two awards from Cambridge University Entrepreneurs in 2011 which is reported in Cambridge Elevator news as ‘25 Cambridge technologies that could change the world’.

Abstract:

Conventional colour filters in CMOS image sensors are made of dyes or pigments and exploit their particular absorption properties to produce different colours. Plasmonic colour filters are superior to conventional colour filters made of dyes and pigments, especially when the pixel size is reduced to a few microns in size. This is because the dyes or pigments based filters cannot be made much thinner than several hundred nanometres due to their low absorption coefficients as well as due to fabrication of each of the three dye filters for RGB colour schemes demands complex lithographic processes. In addition to these, dyes and pigments based filters are prone to colour cross talk at submicron scale. Colour filters based on plasmonic filters can overcome the above difficulties. Also, the plasmonic filters integrated w i t h CMOS image sensors are environmentally friendly compared to their toxic counterparts. Here, we present plasmonic colour filters design based on localised surface plasmon resonances in aluminium nanodisks that are angle insensitive, polarization insensitive, inexpensive, compatible with existing CMOS technology and have high transmission coefficients.

Biography:

Rahul Sahay graduated with a PhD in Mechanical Engineering from National University of Singapore, Singapore (2013) and also worked as Research Associate at School of Materials Science and Engineering, Nanyang Technological University, Singapore, (2010–2012). After completion of his PhD degree, he was appointed as Assistant Professor in Mechanical Engineering Department at Amity University, Haryana, India (2013–2014). He is currently a Research Fellow at EPD, Singapore University of Technology, and Design, Singapore (since 2014). His current research interests include fabrication of nanomaterials for reusable adhesive applications, and development of nanofibrous 3D printer for fabricating flexible electronics.

Abstract:

Biomimetic poly (vinylidene fluoride) (PVDF) hierarchical structures were fabricated using electrospinning combined with template wetting method for dry-adhesive applications. In the first step, electrospinning was used to produce micron sized PVDF fibers. Following this step, the fibers were placed on porous anodized aluminum oxide (AAO) template. The setup was heated above the glass transition temperature of PVDF to enable the flow of PVDF within the porous channels and to grow nanometer sized pillars on the surface of electrospun fibers. The morphology of the fabricated hierarchical electrospun fibers was investigated using scanning electron microscopy (SEM). The adhesion performance of the samples was investigated using nanoindenter. A flat circular indenter tip (diameter=10 µm) was used to indent the samples and then retracted back to measure the pull-off force between the indenter tip and the samples. The adhesion performance of both neat PVDF fibers and hierarchical PVDF structure were investigated. The hierarchical PVDF structure exhibit increased pull-off force compared to neat PVDF control samples due to its improved van der Waals interactions with the indenter tip. The effect of penetration depth of indenter tip on the pull-off force was also investigated. The achieved experimental results indicate that these biomimetic adhesive structures can potentially be used as reusable adhesives for wide variety of applications.

Biography:

Mary Mehrnoosh Eshaghian-Wilner is an interdisciplinary scientist and patent attorney. She is currently a Professor of Engineering Practice at the Electrical Engineering Department of USC. She is best known for her work in the areas of optical computing, heterogeneous computing and nanocomputing. Her current research involves the applications and implications of these and other emerging technologies in medicine and law. He has founded and/or chaired numerous IEEE conferences and organizations and serves on the Editorial Board of several journals. She is the recipient of several prestigious awards and has authored and/or edited hundreds of publications, including three books.

Abstract:

Continuing development in the field of nanomedicine—and in particular, nanorobotics—promises new medical solutions through the direct treatment of cells. While much of the work being done in nanorobotics remains theoretical, the creation of a multifunctional, medicinal nanorobot capable of diagnosing and treating diseases such as cancer appears feasible. Nanorobots are especially exciting because their scale gives them certain advantages not available to larger robots. These advantages have the potential to vastly improve therapies. For example, nanorobots’ ability to target and treat a single tissue area or cell could make therapies perform more efficiently and cause fewer side effects. Experimentation is currently being done on organic, inorganic and hybrid nanorobots, with inorganic nanorobots thought to be the most likely to succeed in performing the complex, precise tasks required of medical nanorobots. Biocompatibility is an important requirement for nanorobots and will present challenges for researchers in the coming years. Without the ability to physically produce robots on the nanoscale, researchers can use computer modeling to determine how various components will function once introduced into the body. Our research team at the University of Southern California has developed a system that models nanoscale drug delivery through the bloodstream. As interest in nanomedicine and nanotechnology builds, research institutions around the world are receiving increasing amounts of funding to explore and innovate in these areas.

Biography:

J P Singh has completed his PhD from Inter University Accelerator Center, New Delhi and Post-doctoral studies from Rennselaer Polytechnic Institute, NY. He is currently an Associate Professor at IIT Delhi, India. He has published more than 75 papers in reputed journals and won many national and international awards.

Abstract:

Here, a simple, fast and effective approach for controlled reversible wettability switching of ZnO nano-wires (NWs) from super-hydrophobic to super-hydrophilic state is demonstrate. ZnO NWs were synthesized by chemical vapor deposition (CVD) method. The as-synthesized ZnO NWs are super-hydrophilic in nature with contact angle (CA) value of 0º. The as-synthesized ZnO NWs were annealed in H2 gas (50sccm) atmosphere for 1.5 hour at 300°C. After H2 gas annealing treatment, the sample becomes super-hydrophobic with CA value of 153.5°. On the other hand, if the super-hydrophobic ZnO NWs were annealed in O2 gas (50sccm) atmosphere for 1 hour at 300°C the sample becomes super-hydrophilic. Figure 1 shows the reversible wettability switching of ZnO NWs with alternative H2 and O2 gas annealing treatment. The results indicate that the ZnO NWs surface with rare oxygen vacancy defects is more favorable for water wetting. The super-hydrophobic ZnO NWs coating can be utilized to prepare super-hydrophobic transparent substrate with more than 70% transparency.

Biography:

Chii-Chang Chen received his Ph. D. degree in Sciences for Engineer from Université de Franche-Comté (Besançon, France) in 1998. His dissertation work dealt with modification of polarization-independent modulators in LiNbO3 by laser ablation. In 1998, he worked in Laboratoire dOptique P.M. Duffieux of Besancon to study high-speed LiNbO3 modulators. He joined Friedrich-Schiller-Universität Jena(Germany) as a visiting researcher in 2005 for 3 months and in 2007 for half month. Since 2005, he becomes associate professor in IOS-NCU. He joined Université Paris 13 (France) as a visiting researcher in 2006, 2007 and 2011 for 1 month, respectively. He received the NSC Wu Ta-You memorial award in 2006 and NCU excellent research award from 2006 to 2009, respectively. In 2008, he received Ritek young optical engineering award from Taiwan Optical Engineering Society. Since 2009, he becomes professor. He became distinguished professor of NCU since 2010. His current research interests are photonic crystals, nano-optics in LEDs and solar cells, micro-optics, passive components for WDM fiber- optic communications and bio-sensors

Abstract:

Polymer disperse liquid crystal (PDLC), which works by changing the refractive index matching and mismatching between the injected liquid and glass. The light cannot pass through the PDLC film by the index mismatching when the applied voltage turn off, called off state of the PDLC. Otherwise, if there is the electric field applied, the liquid crystals (LC) inside the PDLC droplet will be rotated to parallel arrangement. Than light will directly pass through the film by index match, called on state type. Due to these important properties LC/polymer mixture recently are studies for a wide variety of application, especially most popular in the display and smart window devices. In this work, we developed a novel polymer disperse liquid crystal (PDLC) display using heat curing method. In this article doped with small amount of (about 5 wt%) 3m-diameter silver nanospheres into PDLC. The silver nanospheres can construct the partial electric field between each other in the electric field applied. Therefore these partial electric field can decrease the operating voltage to 40V and also have high contrast and on state transmittance about 73%.

Biography:

Clare was appointed Lecturer in Pharmaceutics at Keele University in 2011. She completed her PhD at the Robert Gordon University, followed by a Postdoc at the University of Dundee. Clare’s group is interested in the fabrication of novel image guided drug delivery systems. Clare is a member of the RSC, UKICRS, British Nanomedicine Association and CRS and is a Committee Member of the CRS Preclinical Sciences and Animal Health Committee and is the Secretary of the RSC Chemical Nanosciences Division. Clare has published more than 20 papers and serves as an editorial board member for the Journal of Nanomedicine Research.

Abstract:

Pancreatic cancer is the 4th most aggressive cancer in the western world with less than 34% of patients surviving past 5 years. Lack of specific symptoms results in delayed diagnosis. Theranostics are new platforms, which offer simultaneous diagnosis and therapy resulting in a decrease in treatment time. Here treatments are conugated onto diagnostics by stimuli responsive binding allowing for controlled drug release resulting in a rapid and localised clinical effect. Hybrid nanoparticles are composed of an iron oxide core surrounded by a rigid gold shell. These particles undergo manipulation due to inherent magnetism of the core whilst laser irradiation of their gold shell results in localised heating due to surface plasmon resonance. Hence, they can be utlilised as diagnostics using MRI and laser irradiation can be used as a trigger for drug release. In our studies, we designed hybrid nanoparticles (50 nm) capable of drug loading onto their surface (3:1:0.25, Drug:Fe:Au). By exploiting the gold surface-to-drug interaction of a range of novel Bisnaphtalamido based agents a system with heat triggered drug release was produced. In vitro studies of these formulations on human pancreatic adenocarcinoma cell lines (BxPC-3 & Panc-1) showed the novel formulations possess a 10-fold lower IC50 value when compared with the free drug after only 24 h. These cytotoxicity studies combined with cellular uptake studies showed the formulations to be significantly more effective compared with gemcitabine. In vivo trials have commenced to further elucidate their viability for use as theranostics in pancreatic cancer therapy.

Biography:

Tanuja Mohanty had received her PhD degree from Utkal University, India in 1999 and did her Post-doctoral work at Inter University Accelerator Centre, New Delhi. Since 2006, she is working as faculty in Physics in School of Physical Sciences, Jawaharlal Nehru University, New Delhi. She has published nearly 50 research papers in International Journals of repute and has addressed many International Conferences. For over a decade, she has been working in the field of smart nanomaterials.

Abstract:

Graphene is a 2D carbon network exhibiting zero band gap thus limiting its application in nanoelectronics and energy materials. Nitrogen doping of graphene has been found to be a suitable route to open the band gap and tune the electronic structure of graphene for its application in lithium batteries, fuel cells and supercapacitors. Substitutional doping by chemical route although has become in practice, yet lacks a systematic control over dopant concentration. On the other hand, insertion of nitrogen atoms into graphene by nitrogen ion implantation at low energy (few eV to keV) range is much more fruitful in controlling the dopant concentration and dopant distribution by allowing uniform incorporation of dopants through production of point and extended defects. Variation of ion beam energy and fluence results in different doping levels giving rise to different branching ratio between pyridinic and graphitic nitrogen. This results in systematic variation in intensity ratio of D and G and 2D peaks of Raman spectra of graphene. Ion bombardment induced carbon loss leads to formation of various kinds of defects in the graphene lattice where the nitrogen atoms are able to insert and bond to neighbouring carbon atoms. The loss of carbon atoms are estimated from SRIM-2013 (stopping of ion in matter) simulation programme. Scanning Kelvin probe measurement reveals that N-ion implantation leads to a shift in the Fermi level of pristine graphene in a controlled manner. The areal density of N-implantation induced electron doping quantified from the integral of the Fermi level shift is correlated with the observed variation in Raman spectra with fluence.

Biography:

Anthony completed his PhD from Manchester University and postdoctoral studies from Boston College, Massachussetts. He joined Keele University in 1993 and is currently Senior Lecturer in Organic and Medicinal Chemistry in the School of Pharmacy. He carries out his research into synthetic chemistry and drug discovery and delivery as part of Keele Nanopharmaceutics Research Group. Anthony is a Fellow of a the Royal Society of Chemistry, and member of the American Chemical Society and the United Kingdom and Ireland Controlled Release Society.

Abstract:

Calix[4]resorcinarenes (CXRs) are cyclic oligomers commonly used as starting materials or building blocks in the design of supramolecular systems but a recent review has detailed their potential for drug delivery. They have well-defined upper and lower rims and possess a central hydrophobic cavity for host guest interaction with organic molecules. CXRs enhance the solubility of hydrophobic drugs via hydrophobic interaction. However, studies have suggested that the defined interior of the calixarene structure is only suitable to solubilise drugs of a certain architecture. This work focussed on the solubilisation potential of a sulfonated CXR using propofol as a model hydrophobic drug. Propofol is a commonly used short acting anaesthetic agent currently formulated as an oil in water emulsion due to its poor aqueous solubility. This viscous solution often proves painful to patients resulting in the need for pain relief . In this study a sulfonated CXR derived from octanal was fabricated and characterised by 1H NMR and FTIR. The CXRs formed were 92 nm at low concentration (0.01 mgmL-1), however at increased concentration (5 mgmL-1) the size increased to 363 nm. The drug loading studies showed an increase in propofol solubilisation up to 9 mgmL-1, which, when combined with the particle size measurements suggests that supramolecular species are formed in which drug molecules are surrounded by the CXRs rather than an individual drug molecule being hosted within the hydrophobic cavity of the CXR. This study highlights the potential of sulfonated CXRs as drug solubilising agents.

Biography:

Pavol Hvizdoš has completed his PhD in Material Sciences from Technical University, Košice, Slovakia. He has been working at the Institute of Materials Research since 1988 and as Director since 2014. He spent as Marie Curie Fellow for two years at Queen Mary University, London, UK. Later, he worked for five years as Ramon y Cajal Fellow at Polytechnic University of Catalonia, Barcelona, Spain. He has published more than 100 papers in reputed journals with more than 370 citations.

Abstract:

A range of complex composites based on SiC matrix with conductive additives such as TiNbC and carbon nanotubes of various volume fractions was prepared. The microstructure and chemical composition were studied by SEM equipped with EDX analyzer. Mechanical properties such as hardness and fracture toughness of prepared composite materials were evaluated by means of Vickers indentation. Propagation of indentation cracks was analyzed using light microscopy and SEM. Nanohardness and elasticity of individual constituent phases were determined by instrumented nanoindentation. Wear and its mechanisms were studied by means of tribological testing in pin-on-disc configuration and wear resistance. Additionally, the electric conductivity as function of volume fraction and distribution of the condutive additives was determined and percolation limits established. Machinability of the prepared materials by electric discharge technique was tested and material removal mechanisms determined.

Biography:

Yeojoon Yoon has completed his PhD from Yonsei University and Postdoctoral studies from Korea Electronics Technology Institute. He is working on the application of graphene-based materials to water treatment technologies such as adsorption, catalytic oxidation, and membrane process. He has published more than 20 papers in SCI journals.

Abstract:

Since graphene, a new generation of nano-carbon material, was discovered, it has received attention in diverse fields including environmental applications. Here, we report a facile method to prepare graphene-based materials using a Couette-Taylor flow reactor. Furthermore, this study investigates possible water treatment applications using graphene-based materials. Several representative physiochemical water treatment technologies such as adsorption, catalytic oxidation, and membrane process were used for evaluation. In the adsorption evaluation, an experiment was conducted in which As(III) and As(V) were removed by synthesizing magnetite (Fe3O4) with graphene. The synthesized Fe3O4-graphene oxide exhibited better arsenic adsorption capacity compared to reduced graphene oxide produced with Fe3O4 synthesis because the functional groups on the graphene oxide (GO) surface facilitate greater synthesis of Fe3O4. Non-oxidative graphene (nOG), which enables mass production at a lower cost and in a shorter time compared to the previous two graphene-based materials (GO and rGO), had a higher arsenic adsorption removal rate in case of using the synthesized Fe3O4-nOG than the other reported Fe3O4 synthesis absorbents. Among graphene-based materials tested in catalytic ozonation, GO had the highest hydroxyl radical generation rate. However, nOG had a significantly higher ratio of generated hydroxyl radicals to consumed ozone. Additionally, in the case of nOG, hydroxyl radicals existed with an even ratio of graphene surface and bulk solution. In the membrane process using graphene-based materials, the GO-blended membrane, which has hydrophilicity due to its surface functional group, performed the best, while the polysulfone membrane had larger pores and higher permeability than the polyvinylidene fluoride membrane.

Biography:

Su Yeon Choi received her PhD degree in 2015 at INHA University and joined the Korea Electronics Technology Institute as a Postdoctoral fellow. Her thesis focused on the self-assembled nanostructure of conducting polymers in thin films and solution state. Her current research focuses on the development of graphene-based nanocomposites for various applications such as sensor, photocatalyst and supercapacitor.

Abstract:

Described herein is a flexible and lightweight sensor made of a thin film composed of graphene nanoplatelet (GNP), which was printed onto flexible plastic (poly-ethylene terephthalate, PET) surfaces by using inkjet techniques. The flexible film sensor could selectively detect environmental hazardous chemicals such as acids (hydrofluoric acid, sulfuric acid, nitric acid, and hydrochloric acid) and petroleum (gasoline, diesel, and kerosene). Graphene, as a next generation electronic material, which is also the basic structure of all graphitic materials, is a one-atom-thick planar sheet of sp2 bonded carbon atoms in a honeycomb crystal lattice. GNP exhibits excellent electron transfer promoting ability for some species and excellent catalytic behavior toward small bio/molecules, which makes GNP extremely attractive for electrochemical sensors. The film sensor based on GNP take advantages of the increased electrode surface area, mass-transport rate and fast electron transfer compared to sensors based on bulk materials between other factors. However, the main challenge of how to improve the selectivity of the film sensors to the hazardous chemicals remains. In order to meet this requirement, the inducing of appropriate polymers, resins, and metal ions-specific functional groups onto the film with the desired properties was performed in this study.

Biography:

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Abstract:

In recent years, the development of efficient green chemistry methods for synthesis of magnetic nanoparticles with properties of superparamagnetism in addition to their low toxicity and biocompatibility has attracted more attention. Magnetic nanoparticles have been used for different applications including biosensors, bioseparation, drug delivery, magnetic resonance imaging contrast agents, and hyperthermia treatment of cancer. In the present study, we report a rapid and greener synthesis of magnetite iron oxide nanoparticles (Fe3O4-NPs) in aqueous solution using Ferric chloride (FeCl3•6H2O), ferrous chloride (FeCl2•4H2O), Ammonium hydroxide (NH4OH) and Natural honey as Fe3O4-NPs precursors, reducing agent, stabilizer and capping agent respectively. The spherical particles with the size below 20 nm successfully synthesized. The obtained nanoparticles were characterized by X-ray diffraction (XRD) analysis, Field Emission Scanning Electron Microscope (FESEM), energy dispersive X-ray fluorescence (EDXF), high-resolution transmission electron microscopy (HR-TEM), Vibrating Sample Magnetometer (VSM), and Fourier transforms infrared spectroscopy (FT-IR). Moreover the effect of other parameters such as pH of the solution and different percent of the stabilizer on the Fe3O4 nanoparticles was studied.

Biography:

Mohamed Ahmed Abdel Kawy Hammad has completed his PhD from Egypt Japan University of Science and Technology and currently he is working as a researcher at Central Metallurgical Research and Development Institute, Cairo. He has published many papers about synthesis of nano materials by using advanced technology.

Abstract:

In this study, nano iron-copper core shell was synthesized by using Kinetic energy micro reactor (K-M reactor). The reaction between nano pure iron with copper sulphate pentahydrate (CuSO4.5H2O) beside Na CMC as stabilizer at K-M reactor gives many advantages in comparison with traditional chemical method for production of nano iron-copper core shell in batch reactor. Many factors were investigated for its effect on the process performance such as initial concentrations of nano iron and copper sulphate penta-hydrate solution. Different techniques were used for investigation and characterization of the produced nano iron particles such as SEM, XRD, UV-Vis, XPS, TEM and PSD. The produced nano iron-copper core shell particle using micro mixer showed better characteristics than those produced using batch reactor in different aspects such as homogeneity of the produced particles, particle size distribution and size, as core diameter 10nm particle size were obtained. The results showed that 10 nm core diameter were obtained using Micro mixer as compared to 80 nm core diameter in one fourth the time required by using traditional batch reactor and high thickness of copper shell and good stability.

Biography:

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Abstract:

Introduction: Identification of the tendon derived stem cells (TDSCs) suggests a new paradigm to develop a new treatment of tendon healing. Provision of adequate environment to differentiate these stem cells into normal tenocytes becomes an important issue. However, there has been no knowledge about the control of the TDSCs to repair the damaged tendon tissues in tendinopathy. The purpose of this study is to investigate how nano-topographic signals control the TDSCs extracted from diverse tendon status. Methods: TDSCs were primarily cultured and isolated from the tendon tissues of 5-week old normal Sprague-Dawley (SD) rats (n=2), 15-week old normal SD rats (n=2), and a 38-week old normal SD rat (n=1) and from the tendon tissues of 5-week old SD rats with tendinopathy (n=2) and 15-week old SD rats with tendinopathy (n=2). They were cultured on the diverse nano-topographic matrices; (1) 19.8 MPa surface stiffness with 800 nm width nano-groove, (2) 2.4 GPa with 800 nm, and (3) 2.4 GPa without groove (flat surface) until reaching confluence of 80%. If TDSCs did not reach the confluence, β-galactosidase staining was done to check the senescence. Doubling time was calculated for the proliferative capacity in each condition. Differentiation capacity was evaluated under the chondrogenic, adipogenic, and osteogenic condition. Major components of tendon including collagen type I (Col1), collagen type III (Col3), and decorin were expressed for the reparative capacity by the immunofluorescent staining and qRT-PCR. Results: Proliferative capacities were not significantly different according to the age or pathological condition except TDSCs from 38-week old rat which were not proliferated and underwent the senescent process. Osteogenic differentiation was strong in 5-week old tendinopathy and adipogenic differentiation was strong in 15-week old tendinopathy. In TDSCs from 5-week and 15-week old normal rats, protein expression of Col1 and the ratio of Col1/Col3 in 19.8 MPa plate with 800 nm nano-topographic grooves were significantly higher than other plates. This difference according to the nano-topographic signals and surface stiffness was not found in TDSCs from 5-week old tendinopathy and 15-week old tendinopathy. This was consistent with the gene expression in qRT-PCR analysis. Conclusion: TDSCs extracted from normal tendon show the best reparative capacity in a specific condition (19.8 MPa with 800 nm nano-topographic grooves), which is similar to the normal in-vivo status. However, this preference is disturbed in tendinopathy, which results in aberrant differentiation of TDSCs. To restore the tendon function properly in tendinopathy, we must consider these characteristics of TDSCs and find the optimal conditions to induce the Col1 expression and to prevent the aberrant differentiation.

Biography:

Dr. Chithrani received her PhD in quantum physics from University of Toronto. Dr. Chithrani is an Assistant professor of physics at the Department of Physics, director of the Nanoscience and Technology Development Laboratory. She also works as an iBEST scientist at St. Michael Hospital. Her research program directed towards building of smart nanomaterials for improved cancer therapeutics. She proved for the first time, MeV energies. This research is featured on the cover of the Radiation Research Journal in 2011. She has also shown that size of nanomaterials has a strong effect in their interactions with tumor tissue. This work is also featured on the cover. Her publications have received over 4000 citations in few years’ time. She is an associate editor of many nanotechnology related journals.

Abstract:

Gold nanoparticles (GNPs) in particular have been extensively used in cancer research due to their ability to act as an anti-cancer drug carrier and as a dose enhancer. Our previous studies in vitro at monolayer cell level have shown that NPs of size 50 nm shows the highest uptake among the size range 14 - 100 nm. However, recent studies on NP transport through tissue-like structures showed that smaller NPs (14 nm) penetrates better through the tissue compared to larger (50 nm) NPs. Hence, we modified the surface of smaller NPs using a peptide containing integrin binding domain (RGD) to enhance the uptake of smaller NPs. We have shown that peptide modified NPs had a higher uptake leading to enhancement in radiation dose and improved drug delivery. This would lead to more effective combined treatment for therapy resistant aggressive cancers. Hence, it is possible to innovate smart nanomaterials for improved outcome in future cancer care.

Biography:

Muhamed Shajudheen V P is a PhD Scholar of Karpagam University, Department of Physics. He is the District Programme Officer of Education of Kerala Government. He has published many papers in reputed journals.

Abstract:

In this paper, a simple chemical precipitation route for the preparation of titanium dioxide nanoparticles, synthesized by using titanium tetraisopropoxide as a precursor and polyvinyl pyrrolidone (PVP) as a capping agent, is reported. The Differential Scanning Calorimetry (DSC) and Thermo Gravimetric Analysis (TGA) of the samples were recorded and the phase transformation temperature of titanium hydroxide Ti(OH)4 to titanium oxide (TiO2) was investigated. The as-prepared titanium hydroxide precipitate was annealed at 800ï‚°C to obtain TiO2 nanoparticles. The thermal, structural, morphological and textural characterizations of the TiO2 nanoparticle samples were carried out by different techniques such as DSC-TGA, X-Ray Diffraction (XRD), Fourier Transform Infra-Red spectroscopy (FTIR), Micro Raman spectroscopy, UV-Visible absorption spectroscopy (UV-Vis), Photoluminescence spectroscopy (PL) and Field Effect Scanning Electron Microscopy (FESEM) techniques. The as-prepared precipitate was characterized using DSC-TGA and confirmed the mass loss of around 30%. XRD results exhibited no diffraction peaks attributable to anatase phase, for the reaction products, after the solvent removal. The results indicate that the product is purely rutile. The vibrational frequencies of two main absorption bands of prepared samples are discussed from the results of the FTIR analysis. The formation of nanosphere of diameter of the order of 10 nm, has been confirmed by FESEM. The optical band gap was found by using UV-Visible spectrum. From photoluminescence spectra, a strong emission was observed. The obtained results suggest that this method provides a simple, efficient and versatile technique for preparing TiO2 nanoparticles and it has the potential to be applied to other systems for photocatalytic activity.

Biography:

Subbiah Alwarappan received his undergraduate and post-graduate degrees in Chemistry from India. He received Australian Government’s prestigious IPRS Fellowship and pursued his PhD at Macquarie University, Sydney, Australia. After his PhD, he moved to the United States and held various positions at The University of Iowa, Florida International University and University of South Florida for more than six years. At present, he is working as a Scientist employed at CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamil Nadu, India. He has extensive experience in the research area of electroanalytical chemistry, nanomaterials and quantum dots. He has published over 40 peer reviewed articles, 2 book chapters and 1 book. He also has 1 US patent to his credit. He has presented his research findings in more than 10 international conferences. He has about 1100 citations and serves in the Editorial Board of 4 international journals. He also serves as a reviewer for more than 50 journals and an expert member to review proposals for American Chemical Society and Israeli Ministry of science. He is the Member of Royal Society of Chemistry (UK) and American Chemical Society.

Abstract:

Biosensors are often employed for the quantification of biological/biochemical process and thereby, they find potential application in medical diagnostics and in biotechnology. Biosensors are analytical devices that essentially incorporates bio-recognition element such as antibodies, enzymes, organelles, cell-receptors, nucleic acids and engineered proteins. In electrochemical biosensors, these bio-recognition elements are integrated with electrochemical transduction system. Recent advancements in the development of nanomaterials such as graphene opened up the route for constructing novel electrochemical transduction platforms for a variety of bio-sensing applications. The advantages of graphene include high surface area, excellent mechanical strength, high elasticity, tunable band-gap and high electron mobility. Further, the proposed graphene based electrochemical biosensors offers excellent sensitivity, selectivity, rapid response time, high signal-to-noise ratio and the possibility of multiplexed detection. In this presentation, the usefulness of graphene as the transducer platform for a variety of electrochemical bio-sensing applications such as neurotransmitters detection, biomarkers detection and DNA mutation analysis will be discussed.

Biography:

Abdallah Ougazzaden is a Professor at ECE School at Georgia Tech, Director of GT-CNRS lab, Director of the European Campus of GIT, and Co-President of Lafayette Institute in the platform of technology transfer. He worked in R&D at France Telecom for 12 years and one year at Optoplus/Alcatel. In 1999, he joined Bell-Labs at Lucent Technologies (USA). He kept this position with the company Agere Systems (USA), and then at TriQuint Semiconductor (USA). His current research activity is in the field of semiconductors and related devices. He has published more than 350 papers and holds 23 patents and served as Chair of IC-MOVPE 2008.

Abstract:

Nanostructures based on wide bandgap III-nitrides have recently emerged as one of the most promising class of material for site-controlled opto-electronic and nanophotonics devices. But growing high quality thick III-nitride alloys like InGaN, BGaN and AlGaN is challenging due to lattice mismatch induced phase separation, defects and dislocations. Nanoselective area growth (NSAG) of GaN, InGaN and BGaN nanopyramids on GaN template, Si substrates and sacrificial-ZnO/Al2O3 was investigated to mitigate the above issues. Nanopatterned SiO2 with 100 nm circular openings was made using E-beam lithography. Growth of thick InGaN and BGaN was carried out by MOCVD on silicon substrates and ZnO templates. This nano bottom-up approach leads to dislocation free nanostructures due to the three dimensional stress relief mechanisms. In stark contrast to the conventional epilayers, which contain 3D surfaces, huge density of defects and V-pits network, the GaN, InGaN and BGaN nanopyramids are uniformly sized and hexagonal in shape. Cross sectional STEM analysis confirms that these nanopyramids are single crystalline and free from threading dislocations. Full PIN structures were grown sandwiching the InGaN nanopyramids on GaN templates. Further 2D layered BN on 2” sapphire wafers were realized for the first time to serve as a platform for combining graphene nanoelectronics with III-nitride nanophotonic components. Given their expected high performances and lifetime, along with their industrial maturity for light-emitting diode (LEDs) applications, such alloy nanostructures are appealing for new generation of optoelectronc devices. New designs and device structures for high efficiency solar cells, µ-LEDs, gas and water sensors will be presented.

Biography:

Abbas Saeed Hakeem has completed his PhD from Stockolm University. He is Reseach Scientist at Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals. He has published more than 25 papers in reputed journals.

Abstract:

Aluminosilicate oxynitride and cubic boron nitride (cBN) composites having excellent mechanical properties and chemical stability in room temperature to high temperature applications. In the present study, cubic boron nitride (cBN) reinforced alpha-Sialon nano-composites were prepared using spark plasma sintering (SPS) technique. The starting powders including Sialon precursors and various particles size of cBN (10, 20 and 30 wt.%) were homogeneously mixed by probe sonication before sintering. The effect of SPS processing parameters on the densification and mechanical behavior of these nano-composites were investigated. These cBN enabled in the densification sialon composite samples were analyzed for phase identification by X-ray diffraction. As well as, composite samples were evaluated to find cBN to hBN transformation in the Sialon matrix sintered at 1500C. Field emission scanning electron microscopy (FESEM) used for morphology and hardness and fracture toughness were measured.

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Abstract:

Pyrolysis of bitumen has been performed without water, in supercritical water and over cerium oxide catalyst to further understand the upgrading mechanism of bitumen at 723 K. The asphaltene conversion was promoted in catalytic cracking compared with hydrothermal and thermal cracking, respectively. Based on the results, the lightest oil was extracted in catalytic cracking and the concentration of asphaltene in rich oil phase was decreased. On the other hand, physical effect of water can change phase equilibrium which affects the reforming reactions. Another keen aspect is of hydrogen transfer from water to heavy oils in the presence of catalyst. In this research, CeO2 was employed as catalyst and the possibility of oxidative decomposition and hydrogenation of bitumen in supercritical water was studied. A redox reaction between the water, bitumen, and catalyst was occurred for the production of hydrogen and oxygen. It was found that the oxygen storage capacity (OSC) of the cerium oxide nanoparticles with cubic {100} facets was nearly 3.4 times higher than that of the cerium oxide nanoparticles with octahedral {111} facets. Therefore, heavy oil fractions of bitumen were cracked in a batch-type reactor at 723 K in order to produce as much light oil as possible, and the effect of water density, the catalyst loading and reaction conditions on the conversion rate and coke formation were investigated. As a result, it was demonstrated that it is possible to obtain a high conversion rate by employing cubic CeO2 nanocatalyst that shows high exposed surface area and large OSC.

Biography:

Ahmed Thabet is an Associate Professor at Aswan University, Egypt. His research Interests are in modelling the nano-technology materials of electrical engineering applications, improving electrical properties of insulating materials , improving performance of low and high voltage cables, and active protection from electromagnetic field hazards of high voltage power line. He has also Analyzed and prepared statistics on Egypt’s participation in EU Funded projects.

Abstract:

The key challenge faced by electrical industrial systems is how to improve operation efficiency with acceptable cost. The wide possibilities of the existing polymers and, particularly, the huge scenarios of new polymer compounds in electrical technology inspire the researchers of the field to innovate and compound new electrical industrial materials to study their properties and behavior thoroughly. The research work on novel nanotechnology materials is of great significance both nationally and internationally in the field of power engineering, and environmental technology due to the increasing demands of more cost-effective, efficient, reliable and environmentally satisfactory industrial equipment. Recently, preliminary work investigates the capability of nano-composite polymeric materials for electrical insulation to show improved electrical performances with respect to the corresponding conventional materials, possibly filled by nano-grains or chemical additives. For our future view, innovating models of solar cells, power cables, capacitors, and electromagnetic industrial applications, etc., lead to achieve more cost-effective, energy-effective and hence environmentally better electrical technology products. In our research, nanotechnology aims to the following points: 1) Designing theoretical and experimental new life models for developing the electrical materials with micro- and nano-scale fillers for solving its affecting problems, 2) Introducing innovative product models of nanotech solar cells, power cables, capacitors, and electromagnetic industrial applications, etc., based on nanotechnology techniques, 3) Transferring and applying technological cooperation areas of nanotech material engineering, 4) Enhancing the performance of conventional electrical products, 5) Improving the reliability performance based on novel materials of power cables and capacitor products, 6) Enhancing electrical behavior based on the novel composite structure of power cables and capacitors material products theoretically and experimentally, 7) Controlling electrical material properties and the characteristics of dielectric materials with respect to our request and the technology applications usage, 8) Testing new fast possible ways for developing the solar cells properties of nanotech materials via addition nanoparticles, and 9) Investigating different factors affecting the properties of electrical materials.

Biography:

JAYAPOORANI has completed her PhD in the area of NANOELECTRONICS from Anna University,chennai,INDIA.She is a Professor at Sona College of Technology,Salem ,Tamilnadu a premier Institution in India. She has published more than 12 papers in reputed journals in the area of nanoplating and has a MoU signed with TITAN Industries (Watch and Accessories division),Hosur,Tamilnadu.She has an experience of 12 years in teaching and 8 years on nanomaterials research and published a book on Professional ethics and Human Values,2014.

Abstract:

Drinking water plays an important role in the health and hygiene of a human. Every country maintains different standards. From ancient times in India, drinking water is stored in silver vessels because it kills germs and controls the germs multiplication. Silver has the characteristic of being antimicrobial and it is used for plating the vessels. Silver has least toxicity to animal cells. Thus, it makes the water sterile. Pulse plating is used because it produces nanograin when plated. Thus nanoplating using silver metal is done on storage vessels. This technique can ideally be used in hospitals to serve the patients. When the storage medium is made small in size, can ideally be used in homes for improvising the health of the people in whole. There is an increase in adhesion of the plated material on to the substrate, increase in hardness, high smoothness and highly antimicrobial activity is acheived through nanoplating. When any material is coated with nanograin, obviously it has the property of using very low raw material absorption rather than the conventional DC plating with higher order grain size.

Biography:

J Jeyanthi has completed her PhD in 2006 from Bharathiar University, Coimbatore. She is the Associate Professor in Civil Engineering Department of Government College of Technology, Coimbatore, a premier autonomous Government Institution under the control of Directorate of Technical Education, Chennai. She has published 22 papers in reputed journals. She has produced two PhD scholars and currently, seven research scholars are working under her. She is handling classes for ME Environmental Engineering and has guided about 50 ME thesis. At present, she is the Principal Investigator for setting up a centre of excellence in Environmental Studies at GCT, through TEQIP funded project worth Rs. 5 crores. Nanotechnology applications is one of the thematic areas of the project.

Abstract:

The present study involves the applicability of cobalt ferrite and manganese ferrite nanoparticles as an adsorbent for the removal of lead, zinc and Congo red dye from the aqueous solution. The nanoparticles were synthesized by co-precipitation method by incorporating chlorides and sulphates of respective metal ions with sodium hydroxide as pH stabilizer. The point of zero charge for cobalt ferrite and manganese ferrite nanoparticles were estimated by solid addition method and were found to be 9.3 and 6.1 respectively. The synthesized nanoparticles was characterized using X-Ray diffraction, scanning electron microscope with EDAX, transmission electron microscope, vibrating sample magnetometer, Fourier transform infrared spectroscopy and surface area analyzer. X-Ray diffraction and transmission electron microscope studies confirm the formation of single phase cobalt ferrite nanoparticle by showing more crystalline in its alkaline condition. From the X-ray diffraction studies, the size of the cobalt ferrite nanoparticles was found to be in the range 52.87 nm to 60.18 nm while for manganese ferrite nanoparticles the size was found to be in the range 15.82 nm to 17.35 nm. From the transmission electron microscope studies, the size of cobalt ferrite nanoparticles was found to be in the ranges of 16-49 nm and for manganese ferrite nanoparticles, the size was observed to be in the range of 40-200 nm for manganese ferrite nanoparticles respectively. The scanning electron microscope studies reveal that the structure of the nanoparticles were agglomerated and the particles were circular and elongated in shape in the case of cobalt ferrite and mangansese ferrite nanoparticle. VSM studies exhibited the magnetic properties of both the nanomaterials with the help of a soft magnet which indicated the formation of lean loop. FTIR studies reveal the formation of cobalt ferrite and manganese ferrite nanoparticles indicating the presence of relevant functional groups. The adsorption process control parameters were optimised and adsorptive capacity of nanomaterials were predicted through kinetic and isotherm modelling.

Biography:

Anggun Andreyani is currently pursuing her Bachelor of Science from Yogyakarta State University. She is the Director of research organization for student in faculty of science and mathematics, Yogyakarta State University. She has published more than 2 papers in reputed journals and has been serving as an Editorial Board Member of repute. She also has more than 10 grants of research and scientific paper completion in national level. At present, she works as a teacher of research education in senior high school 1 Banguntapan, Indonesia.

Abstract:

Leachate is waste solution as human activity product, it should be managed in order to minimize its negative impacts to the environment and human health. Environmental pollution will also take place due to waste which contains hazardous organic and an organic substances, such as used battery accumulates and broken TL bulbs. Production of those goods uses Plublum (Pb) in its process, so that the Pb will be carried later by the leachate flow to the environment. This work was an experiment 0.2% of Kepok (Musa ascuminata balbisiana colla) banana’s peels nanoparticle is added in leachate with three concentration variation was about 2.5%, 4.0% and 6.3%. The absorbance and size of Kepok (Musa ascuminata balbisiana colla) banana’s peels nanoparticle were determined by Spectrophotometer UV-Vis and Scanning Electron Microscope (SEM). The concentrations of Pb and Cr after treatment were determined by Atomic Absorption Spectrophotometry (AAS). The result showed that concentration of Pb and Cr in leachate decreased after it was treated using experiment Kepok (Musa ascuminata balbisiana colla) banana’s peels nanoparticle. The significant reduction of Pb and Cr concentration is at 6.3% of leachate concentration. Therefore, it can be concluded that treatment using Kepok (Musa ascuminata balbisiana colla) banana’s peels nanoparticle can be applied to reduce concentration of Pb and Cr in a leachate.

Biography:

Biplab Paul got his PhD in 2011 from Indian Institute of Technology Kharagpur, India, where he initiated a new line of research in the area of thermoelectric. In 2011, he joined Universitat Autonoma de Barcelona, Spain, where he led another research line in the area of thermal rectification for practical realization of thermal diode. Presently, he is working in Linköping University, Sweden since 2012. His extensive studies in Linköping University have created a new research line in the area of flexible thermoelectric.

Abstract:

The current research scenario for alternative energy sources is primarily focused on the reduction of dependency on fossil fuels, so that the harmful effects of greenhouse gases can be minimized. Thermoelectricity can contribute to this area of research by waste heat utilization for electric power generation and thus the reduction in CO2 emission. The efficiency of a thermoelectric material is defined by a dimensionless parameter thermoelectric figure of merit ZT=S2T/,where, T,  and  are the absolute temperature, electrical conductivity and thermal conductivity, respectively, and S is the See-beck coefficient or thermo-power, which is defined as V/T, i.e., the voltage that develops across a sample with a temperature gradient of 1 K. High ZT requires an unusual type of material: a good electrical conductor with high thermo-power, but low thermal conductivity, i.e. it must scatter phonons (to minimize lattice contribution to thermal conductivity) without troubling the transport of charge carriers, i.e., ceramic and metallic behaviors are combined to a single material system. Due to the strong interdependency of the parameters S,  and , the reduction of thermal conductivity without deteriorating electrical conductivity is a challenging task. Structuring material systems to the nano-dimension scale can facilitate the tailoring of phononic transport independently or quasi –independently of electronic transport and thus the manifold enhancement of ZT. The focus of the present talk is to discuss the different approaches for tailoring electronic and phononic properties in nano-structured materials at different length-scales leading to the enhancement of ZT.

Biography:

Eui-Hyeok Yang is a Professor of the Mechanical Engineering Department at Stevens Institute of Technology. He was a Senior Member of the Engineering Staff at NASA's Jet Propulsion Laboratory. He received a number of awards, including the prestigious Lew Allen Award for Excellence at JPL in 2003 in recognition of his excellence in advancing the use of MEMS-based actuators for NASA's space applications. He is an Associate Editor and/or Editorial Board of several journals including the IEEE Sensors Journal. As Principal Investigator, he has been responsible for obtaining extremely competitive research funding from several federal agencies including NSF, AFOSR, US Army, NRO, NASA and DARPA (including 6 NSF and 3 AFOSR grants, and 5 NASA and 3 NRO contracts) with the total amount exceeding $7M.

Abstract:

My group's research is aimed at understanding some of the basic principles of smart microfluidics and 1D/2D material growth, solving problems in the implementation of these materials. I will present two different topics. First topic is our development of the low pressure chemical vapor deposition (LPCVD) growth of 1D and 2D materials. We grow large-grain single crystalline or large-scale polycrystalline monolayers of MoS2, MoSe2, WSe2 and WS2 along with other transition metal dichalcogenides (TMDs). Our unique growth method permits the growth of TMDs on the ‘contacted’ areas only, enabling the chip-scale fabrication of heterostructures in arbitrary shapes without lithography. We also demonstrate an approach toward controlled CNT growth atop graphene substrates, where the reaction equilibrium between the source hydrocarbon decomposition and carbon saturation into/precipitation from the catalyst nanoparticles shifts toward CNT growth, rather than graphene consumption. Second, we demonstrate a novel in situ control of the droplet pinning on the polymer surface, enabling the control of droplet adhesion from strongly pinned to extremely slippery (and vice versa). The adhesion of organic droplets on the surfaces dramatically switches in situ (i.e., without the removal of liquid droplets), presenting a great potential for in situ manipulation and control of liquid droplets for various applications including lab-on-chip technologies, oil separation, and water treatment.

Biography:

Edward Yi Chang has completed his PhD from University of Minnesota, USA. He is the VP of Research and Development and Dean of International College of Semiconductor Technology, NCTU, Taiwan. He has published more than 100 papers in reputed journals and is an IEEE Fellow and Distinguished Lecturer.

Abstract:

Outstanding carrier transport properties of III-V compound semiconductors have shown excellent potential for high frequency characteristics. Among them, III-V HEMTs on various material systems like InGaAs/InAlAs, InAs/InP have emerged promising for millimeter wave and terahertz applications. Many previous reports of record high frequency characteristics have shown InGaAs/InAlAs HEMTs with very high cut off frequency (ft) and maximum oscillation frequency (fmax). With increase in Indium concentration higher electron mobility can be achieved which can lead to higher operating frequency. Among them, InAs HEMTs have shown high frequency record of 710 GHz for 60 nm gate length. These HEMT structures can be fabricated for high frequency applications using Molecular Beam Epitaxy (MBE) and Metal Organic Chemical Vapor Deposition (MOCVD) techniques. Small gate length devices have shown excellent RF performances over past two decades. Besides, due to high electron mobility, saturation velocity and large conduction band offset in InAs, InAs-channel HEMTs are also promising for high speed and low power applications. InAs pseudomorphic HEMTs on InP substrate have been reported to have less short channel effects (SCE) through cap recess engineering and demonstrated low gate delay time when biased at 0.5V. In conclusion, InAs devices are promising for high frequency applications upto sub terahertz range and high speed low power logic application for post Si CMOS application. The outstanding performances of the device will be presented in this talk.

Biography:

Seba Sara Varghese received her Master’s degree (M. E) in Microelectronics from Birla Institute of Technology and Science (BITS), Pilani in 2012. She is currently doing her PhD in the area of graphene based gas sensors at BITS, Pilani Dubai Campus. Since September 2014, she has been working as a Visiting Graduate Research Assistant in the Department of Chemical Engineering at the Petroleum Institute, Abu Dhabi. Her research interests include microelectromechanical systems (MEMS) and nanotechnology, carbon nanotubes and graphene.

Abstract:

Graphene, the two-dimensional carbon allotrope with large specific surface area, has shown to be less sensitive to most of the gases, in its pure form. Doping of graphene with other elements has proved to be very efficient in improving the sensitivity of graphene-based gas sensors. Density functional theory (DFT) calculations have reported that O2, NO, NO2 and SO2 are strongly chemisorbed onto phosphorus doped graphene (abbreviated as PG) through the formation of P-X (X = O, N, S) bonds. Similarly, sulphur doped graphene (abbreviated as SG) has shown high selectivity sensing of NO2 compared with NH3, CO, SO2, CH4. Graphene doped with phosphorus and sulphur have been experimentally synthesized. Motivated by the enhanced sensing behavior and successful synthesis of PG and SG, we analyze the suitability of employing them for H2S sensing, which has not been reported earlier. The adsorption property of H2S on PG and SG sheets are theoretically studied using first-principles DFT calculations. We found that in both PG and SG, the dopant atom protrude out of the graphene layer and there is no significant change in their atomic structures after H2S adsorption. The calculations showed weak physisorption of H2S on both SG and PG with small adsorption energies of -0.01 eV and -0.03 eV and large molecule-doping atom distances of around 3.5 Å. The results from the Hirshfeld charge distribution analysis of the structures indicate negligible effect of H2S on the electrical conductance of the doped graphenes. It was observed that the local curvature induced by P and S doping resulting from the bigger size of the dopant than carbon, does not enhance the reactivity of graphene to H2S. The observed weak interactions between doped graphene and H2S indicate that graphene sheets doped with P or S are not suitable for the detection of H2S.

Biography:

Saba A J Sulaiman has been a Lecturer at the Higher College of Technology in Muscat since 2005. She is now a PhD student at Sultan Qaboos University from 2013 where she studies the spectroscopy and dynamics of protein-ligand interaction.

Abstract:

In recent years, nanoparticles (NPs) conjugated with proteins have received much attention due to their exclusive properties that are size tunable. Special interest is given to the dynamic layer formed between the NP and the proteins based on competitive grounds. This layer is usually formed by the proteins covalently binding or adsorbed on the NP surface. Among the several divisions of proteins, human serum albumin (HSA) is one of the major drug carrier proteins in the blood plasma. We have recently studied the spectroscopy of HSA in physiological conditions using fluorescein (FL) as a probe ligand. The quenching effect of FL on the fluorescence intensity of W214 (the sole tryptophan in HSA) indicates that FL occupies the warfarin drug-binding site in the protein which is known to bind most hydrophobic drugs. This was confirmed by site-competitive displacement experiments using ibuprofen and warfarin as site markers. Upon its association with the NP surface, the intrinsic spectroscopic signatures of HSA tends to change. Therefore, modification of the system was performed by coating selected gold nanoparticles (AuNPs) with the HSA-FL complex. The preliminary results indicate a complex formation in which HSA is adsorbed on the AuNPs surface. This was further confirmed using dynamic light scattering and transmission electron microscopy measurements. Significant quenching of the W214 fluorescence was observed in the HSA-AuNP complex which is attributed to the surface plasmon effect on the protein, thereby, implying an efficient energy transfer from HSA to the AuNPs. The absorbance change of the AuNPs was also quantified as a function of the HSA and FL concentration in order to understand the mechanism of interaction with the NPs. Optimization of the complex formation between the AuNPs and the HSA-FL complex will be discussed in the light of the different spectroscopic signatures in both frequency and time domains.

Biography:

Ms. Syeda Juveriya Fathima is working as a research scholar at Defence Food Research Laboratory, India. Ms. Juveriya is doing research on “Development of Vitamin B1 and Vitamin C nanoparticles and their evaluation in vitro and in vivo” for her doctoral studies. She has acquired excellent skills in research methods related to biochemistry. She is considerate, sincere, kind and skilful in interpersonal skills. She has published 2 research articles in reputed journals. Recently published an article entitled "Phosphatidylcholine, an edible carrier for nanoencapsulation of unstable thiamine." in Food Chemistry 197 (2016): 562-570. Ms. Juveriya has written 2 book chapters for Elsevier (Nutrient Delivery).

Abstract:

Vitamin C is an essential micronutrient required in traces in order to maintain skin health, vision and development of skeleton. It acts as an antioxidant thereby reducing the risk of many chronic diseases, also improves immune function and regulates gene expression. The lack of sustainability of vitamin C is due to its susceptibility to high temperature, light and oxygen. Thereby it becomes obligatory to protect this labile ingredient while processing of food and storage. Encapsulation in the form of nanoparticles can prolong the shelf life and target delivery to the desired site; increase retention time. In the present study, chitosan has been used to prepare ascorbic acid nanoparticles by ionotropic gelation method. Ascorbic acid nanoparticles were characterized by measuring particle size, zeta potential (DLS), encapsulation efficiency (90%), thermal behavior (DSC), stability with respect to pH, temperature and time, functional group analysis (FTIR) and morphological (SEM and AFM) analysis. Disintegrating properties; in vitro digestion testing with respect to time at pH range of 1.2-6.8 mimicking gastrointestinal tract was investigated using AFM and HPLC. The effects of nanoparticles on RBC, WBC and platelets were assesed. Chromosomal analysis was performed on phytohemagglutinin stimulated blood lymphocyte cultures treated with the nanoparticles (68 hours). Metaphases were analyzed and karyograms were prepared using standard software. It was found that the vitamin C was successfully encapsulated (size ~100-150nm, zeta potential +50mV) and the nanoparticles formed were highly stable (upto autoclavable temperature i.e 120 oC) and allowed sustained release in small intestinal mimicked environment. No signicant effect was observed on the extent of hemolysis (RBC), membrane integrity (WBC), ADP- induced platelet aggregation and chromosomes. Therefore, nanotechnology can be increasingly applied for fortification of food products with heat and time sensitive vitamins. The technique has great impact and future prospective to protect vitamins during thermal processing and storage of the formulated product and deliver the desired active components to the targeted site of the body.

Biography:

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Abstract:

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Biography:

Nagma Ansari has completed her MSc and MPhil in Physics with first division from Barkatullah University Bhopal (MP) India. Currently, she is pursuing her PhD in Physics (Nanotechnology) from Barkatullah University Bhopal (MP) India. Her area of interest is synthesis, characterization of high-quality zinc oxide (ZnO) nanostructures by rapid thermal evaporation technique and their electronic applications.

Abstract:

In this study, high-quality zinc oxide (ZnO) nanostructures have been successfully synthesized on glass substrates by rapid thermal evaporation technique. It is the material which exhibit dual properties like semiconducting and piezoelectric. Using rapid thermal evaporation technique, nanostructure ZnO has been synthesized under proper growth conditions. The characterization shows that the ZnO probably has the richest family of nanostructures among all materials, both in structures and in properties. In our investigation, we have obtained different nanostructures of ZnO. These nanostructures find applications in optoelectronics, sensors, transducers and biomedical sciences. This work also shows different characterization of synthesized nanostructure ZnO and also their corresponding growth mechanism. The structural properties has been obtained by X-RD, surface morphology has been investigated by SEM. Through Raman spectroscopy, we have obtained complete confirmation about nanostructure ZnO.

Biography:

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Abstract:

Organic pollutants like phenols and organic dyes present in industrial waste water are posing a hazardous threat to aquatic ecosystem. Several measures have been adopted for the neutralization and photodecomposition of these harmful organic moieties, among these semiconductor photocatalysis has been provided a major thrust after the discovery of Honda-Fujishema effect. Present study demonstrates the adsorption of TiO2-P25 in nano size (~36 nm) on cement balls for effective photodegradation of Alizarin and penta chlorophenol (PCP) under UV light illumination. Triton-X was used as a stabilizer for effective adsorption of TiO2 on cement balls (TCB) followed by calcination at ~300oC for 4 h. The TCB’s were dispersed randomly in a self-designed reactor for phototcatalytic performance. The change in concentration of alizarin and PCP was observed under UV-Vis spectroscopy, PCP was detoxified within 40 min while alizarin photo-decomposed within 15 min of UV light irradiation. Taking into consideration the go green slogan and future prospective, this technique can be also utilized under visible light and on mass scale because this is an effective tool for environmental remediation and waste water treatment.

Biography:

Abu Bakar Suriani received her PhD from Universiti Teknologi MARA,Malaysia together with the Excellent Research Award during the convocation ceremony. Afterwards, she has received various research grants, among them are from Kurita Water and Environment Foundation, Japan, Malaysia Toray Science Foundation, Ministry of Higher Education of Malaysia and Ministry of Science, Technology and Innovation of Malaysia. She was awarded the L’Oreal Malaysia for Women in Science Fellowship Award 2013. She has published more than 25 papers in reputed journals and apart from being actively involved in research, she was also the Head of Physics Department, Faculty of Science & Mathematics, UPSI (2013-2015).

Abstract:

A new and facile one-step method to synthesise graphene oxide/natural rubber latex (GO/NRL) nanocomposite was achieved using an electrochemical exfoliation method. In this method, the fabrication of GO/NRL nanocomposite occurs concurrently with GO production that is intermixed with NRL. This approach is a simple and innovative method that succeeded in producing nanocomposite with better conductivity. The samples were characterized using FESEM, HRTEM, FT-IR, UV-vis, micro-Raman spectroscopy, XRD, TGA, I-V and C-V measurements. The C-V analysis showed that the specific capacitance of the samples prepared via the one-step method was 103.7 Fg-1, much better than those produced via a two-step method (32.6 Fg-1). These results were also consistent with the I-V analysis, in which a higher conductivity value was measured for the one-step method (7.12 x 10-5 Scm-1) than for the two-step method (3.62 x 10-7 Scm-1). In conclusion, the one-step method introduced for the fabrication of GO/NRL nanocomposite is a promising method for implementation in supercapacitor applications.

Biography:

Azmi has completed his PhD from School of Chemistry University of Bristol United Kingdom.. He is currently Research Fellow of Nanotechnology Research Centre at Universiti Pendidikan Sultan Idris (UPSI). He has published more than 25 papers in reputed journals and has been serving as Deputy Director International Affairs Divisition UPSI.

Abstract:

Here is presented a systematic study of the dispersibility of multiwall carbon nanotubes (MWCNTs) in natural rubber latex (NR-latex) assisted by a series of single-, double-, and triple-sulfosuccinate anionic surfactants containing phenyl ring moieties. Optical polarising microscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Raman spectroscopy have been performed to obtain the dispersion-level profiles of the MWCNTs in the nanocomposites. Interestingly, a triple-chain, phenyl-containing surfactant, namely sodium 1,5-dioxo-1,5-bis(3-phenylpropoxy)-3-((3-phenylpropoxy)carbonyl) pentane-2-sulfonate (TCPh), has a greater capacity the stabilisation of MWCNTs than a commercially available single-chain sodium dodecylbenzenesulfonate (SDBS) surfactant. TCPh provides significant enhancements in the electrical conductivity of nanocomposites, up to ~10-2 S cm-1, as measured by a four-point probe instrument. These results have allowed compilation of a road map for the design of surfactant architectures capable of providing the homogeneous dispersion of MWCNTs required for the next generation of polymer-carbon-nanotube materials, specifically those used in aerospace technology.

Biography:

Assoc.Prof. RNDr. Richard Dvorsky, Ph.D. has completed his Ph.D in applied physics and postdoctoral studies in nanomaterial sciences from VSB – Technical University of Ostrava in Czech Republic. He is the head of Laboratory of Nanoparticulate Materials and Department of Physical Experiments, a member of Czech Physical Society and the Czech Society for New Materials and Technologies. He has published more than 32 papers in reputed journals, chapter in book (Wiley) and is the inventor of several patents in nanotechnologies.

Abstract:

For practical sorption and degradation of pollutants and hazardous substances, it is possible to advantageously apply a new hybrid nanomaterials with a high specific surface area and the photocatalytic efficiency. This work presents the preparation of effective photocatalytic core-shell nanostructures C60-TiO2-C60 by application of a new patented method of controlled sublimation. Nanoparticles of commercial photocatalytic material TiO2 (P25 Evonik) were subjected to cavitation ultrasonic deagglomeration in a liquid dispersion medium of solution of fullerene C60 in toluene. Subsequently, in a strong ultrasonic field a new method for preparing of microemulsion nanoparticle core-shell C60-TiO2-C60 was applied. Their aqueous nanodispersion was solidified by very fast freezing, which prevents the crystalline segregation of the dispersion and preserves homogeneous distribution of nanoparticles in the solid amorphous block. By controlled sublimation at the chosen temperature and pressure molecules of water were removed from the frozen dispersion. Controlling of conditions during sublimation provided suitable speed of the phase interface retreat between ice and vacuum and dispersed nanoparticles were organised under these conditions into lamellar nanoaggregates with high specific surface area. Thus prepared nanomaterial showed during degradation tests a high photocatalytic activity.

Biography:

Ahsanulhaq Qurashi is Assistant Professor in Center of Excellence in Nanotechnology and Chemistry Department, King Fahd University of Petroleum & Minerals. His research interests are Fabrication and Patterning of Zero and one- and Two dimensional Metal chalcogenide Nanostructures, Functionalization of Nanostructures, Fabrication of Micro and Nanoscale Chemical and Biosensors and Nanomaterials for Renewable Energy Applications. He has 30 publications and 3 book chapters to his credit.

Abstract:

The presentation provides insight into a broad spectrum of the state-of-the-art research activities and development that focuses on the functional metal-oxide nanostructured (MOXN) systems. This includes diverse synthetic methods that lead to form these nanostructures, heterostructure formations, their plausible synthetic mechanisms and detailed characterization. A wide range of remarkable physicochemical characteristics will be discussed, covering a number of nanostructured metal-oxides, such as ZnO, In2O3, SnO2, and TiO2, etc. Current efforts on MOXN gas sensors will be discussed. MOXN based sensors, their fabrication and current status will be the primary focus of this presentation. Also at the end, some additional efforts for energy harvesting i.e., hydrogen production will be discussed.

Biography:

Chunfeng Shi completed his PhD in 2008 at Research Institute of Petroleum Processing (RIPP), SINOPEC, and then stayed as an Engineer. Now, he is Professor and the Director of Nanomaterials Research Group at the long term research department in RIPP. His main research field is nanomaterials with catalytic oxidation function. He has published more than 30 papers in reputed journals and has applied for more than 100 patents in catalysis field.

Abstract:

One pot process (involving in situ H2O2 production with simultaneous conversion to organic oxides in the same reactor without refining), is being regarded as more promising technology to the environmental benign production of organic oxides, for its good potentials for ulterior savings in capital and production costs. In this direct oxidation technology, the catalysts used are bi-functional and mostly consist of precious-metal and titanosilicate. At present, the key issue of the above process is to design new catalysts for improving the synthesis efficiency. One of our aims is to design and prepare this nano bi-functional catalyst with intra-particle voids. In this abstract, our own work on bi-functional catalysts especially for their skillful design and characterization will be summarized and introduced concisely, especially our recent advance in developing titanosilicate with intra-particle voids. In particular, recently, we have synthesized a titanosilicate with intra-particle voids being applied in one pot process, which has been prepared by semi-in-situ synthetic method, which involves the addition of precious metal sources and organic-alkaline to reaction mixture under hydrothermal conditions. The synthetic process results in the combination of nano precious metal particles with titanosilicate framework, and redistribution of active Ti species throughout the crystals, thereby enriching the surface of hollow crystals with catalytic species. Besides easily separated and recycled, the bifunctional catalyst may be a feasible application in industries in the near future. At this meeting, we will briefly summarize our own work on this new type of nano titanium silicalite with precious-metal being combined and hollow structure, especially for their characteristic and catalytic performance, as well as our recent advances in developing the bi-functional titanosilicate with intra-particle voids.

Biography:

Avinash Baji has completed his PhD from the University of Akron (Akron, Ohio) and Postdoctoral studies from the University of Sydney. He joined SUTD as an Assistant Professor in 2013. His current research interests include fabrication of electrospun fibers for bio-duplication of dry-adhesion mechanism of natural fibrillar structures. He has authored over 30 journal articles, with additional papers in conference proceedings. Some of these research papers are highly cited with three recent publications specially featured in (i) Lab Talk, nanotechweb.org; (ii) the Top 25 Hottest Articles by Composite Science and Technology (CST); and (iii) List of Most Downloaded CST Articles.

Abstract:

Natural materials and composites display superior mechanical properties compared to its constituent materials. For example, bones and shells although composed of brittle minerals and soft proteins display high toughness and strength. This is attributed to the organization and structuring of their constituent materials within the composite. Mimicking the size, geometry and the structural design of natural materials can be useful to design and develop new class of synthetic materials. Recently, researchers have used electrospinning to fabricate bio-inspired materials that have found applications in wide variety of fields. For instance, electrospinning is used to fabricate fibers with controllable composition and arrangement such that they closely mimic the natural hierarchical structures for development of functional fibers and membranes that display special wettability. In this study, we used electrospinning to fabricate hierarchical fibrous structures for dry-adhesive applications. These fibers mimic the dry-adhesive mechanisms prevalent in nature, which enables certain animals and insects to scale vertical walls. Briefly, the fibers are electrospun on the surface of a porous anodized aluminum oxide template (AAO). The AAO template with the fibers is then heated above the glass transition temperature of the polymer. This enables the polymer to flow into the pores of the AAO resulting in the formation of sub-nano structures on the surface of the fibers. These hierarchical structures closely mimic the ‘hairy’ structures found on the feet of certain animals. We then investigate the shear and normal adhesion performance of these samples using a tensile tester and atomic force microscope (AFM). The normal and shear adhesion results reveal that these samples adhere to various surfaces including glass and metals. The durability of the adhesive was also verified by repeating AFM adhesion measurements over 1000 consecutive cycles. The normal pull-off force was seen to be constant over 1000 attachment-detachment cycles. These results show the potential of using these electrospun fibers for dry-adhesive applications.

Biography:

Ali Al-Radhi has completed his Bachelor in Mechanical Engineering from Australian College of Kuwait (ACK). He has completed an internship at Kuwaiti Institution of Scientific Research (KISR). He workes on nano coating for enhancing buildings energy efficiency.

Abstract:

The contribution from buildings towards energy consumption has steadily increased reaching figures between 20% and 40% in developed countries for both commercial and residential buildings. In countries with hot climate such as Kuwait, the major elements that causes such increase in energy consumption is the air conditioning system along with the type of glazing used for buildings. This is because the inner temperature increases from infrared heat radiation passing through the windows. For this reason, coating the window using nano technology would help in managing heat generated from radiations. In this work, a study was conducted experimentally on a 6x6x6mm double glaze window using a 500W heat source to determine the technical feasibility of applying single layer commercial nano coating, multi layer commercial nano coating, and commercial 30% shaded film. The results showed that applying a single layer of nano coating material reduced the overall heat transfer by roughly 7°C while with multi layer case; the heat transfer reduction was only 1.5°C less than the single layer scenario. The 30% shaded film has shown poor result, as it reduced only 1°C compared with the original sample. The final temperatures for the original sample, single layer nano coating, multi layer nano coating, and 30% shaded film are 40, 33.235, 31.535, and 38.644°C respectively.

Biography:

Davoud Dastan has completed his MSc from Savitribai Phule Pune University and is currently a PhD student in the same University. He has published more than 15 papers in reputed journals and also participated in more than 30 international conferences.

Abstract:

Organic field effect transistors (FET) have been prepared on flexible substrates. A gate dielectric layer consists of organic and inorganic composite materials have been used for the enhancement of electrical characteristics of the FET. Nano-particulates titania were embedded into poly vinyl alcohol (PVA) and ammonium dichromate. The cross-linking of PVA with ammonium dichromate (PVA-ad) was performed with the exposure of ultraviolet (UV) irradiation. The solution of PVAad+TiO2 was spun onto rigid substrates. The gold contacts were made using thermal evaporation on top of the samples. In order to measure the electrical features of FET’s, an active layer of copper phthalo-cyanine (CuPc6) was deposited andthe output characteristics of the devices were investigated using semiconductor parameter analyzer. The surface morphology of the prepared FET’s was studied by means of Atomic Force Microscopic (AFM).The output characteristics results of devices exposed to UV light revealed higher mobility, on/off ratio, and threshold voltage with respect to the pristine samples.Moreover, devices with PVAad+TiO2 as gate dielectric exhibited better electrical performance compared to those with PVA-ad as gate dielectric. The AFM images illustrated higher surface roughness for irradiated devices. Additionally, granular and uniform morphology with grain sizes in the range of 20-50 nm were observed for FET devices.

Biography:

Tariq Aqeel is a member of the Royal Chemical Society ( MRCS UK) has completed his MSc at Exeter University and PhD from University College London (2004-2008 UK) and became an assistant professor of Inorganic Chemistry at the Public Authority of Applied Education and Training (PAAET Kuwait). His research interests are in synthesizing mesoprous inorganic materials, nanoclusters and nanoparticles, study their optical, sensing and sorption properties. He has published 2 papers so far.

Abstract:

We report the synthesis of crystallite mesoporous tin dioxide framework that contains nano gold clusters confirmed and analyzed by BET, XRD, HRTEM, XPS and UV-visible. The material has a surface area of 97 m2g-1, average pore sizes of 2.7 nm and pore volume of 0.08 cm3g-1. We believe that initially the nano gold clusters occupy the pores of the mesoporous tin dioxide, which restricted their further growth, then some of which diffused to the walls during the heat treatment. The average nano gold clusters are 1.2 nm. The material has a band gap of 2.9 eV that been determined using KubelKa- Munk function. This material would be used for gas sensing and/or optical catalysis.

Biography:

Reza Sadr is associate professor in the mechanical engineering program at Texas A&M University Qatar. His research expertise is in experimental methods in thermo-fluid sciences with focus on advanced energy efficient systems. He received his PhD from University of Utah in 2002. Before joining Texas A&M in 2008, he moved to Georgia Institute of Technology, Atlanta, as research scientist, and then to Georgia Tech Savannah as visiting assistant professor. His current research addresses microfluidics, droplets and sprays, environmental fluid mechanics, and supercritical thermo-fluids. He is a member of American Society of Mechanical Engineering and American Physical Society since 1998.

Abstract:

Colloidal suspensions of nano-sized particles (less than 100nm) dispersed in a fluid, commonly called nanofluids, have shown potentials as industrial fluids due to their enhanced thermo-physical and chemical characteristics. In spite of numerous reports on the anomalous enhancement in thermos-physical properties of nanofluids, there is still no solid theoretical explanation for such enhancements. Present work details various research works conducted at Texas A&M at Qatar, ranging from fundamental at nano-scale to large-scale applications of nanofluids, to better understand these phenomenon. Brownian motion of the particles in the fluid and its effect on the flow field is first discussed. Measurements of the physical and optical properties of nanofluids, such as viscosity, surface tension, refractive index, and optical transmittivity are then reported for suspensions with varying particle concentrations. Results of heat transfer experiments for nanofluids in a microchannel and for a scaled-down industrial heat exchanger is then reported. The results show no anomalous heat transfer enhancements, only marginal enhancement in heat transfer that is in agreement with effective medium theory. Further, experiments to study near-wall velocity at nanoscale are then discussed. Results of these experiments help better understanding of the reported viscosity enhancement for these fluids. Possibility of using nanofluids as drilling fluids, at pressures up to 100 MPa, is also discussed. Finally measurement campaign to investigate spray characteristics for suspensions of nanoparticles in Jet A-1 and an alternative Gas-to liquid (GTL) jet fuels are reported.

Biography:

Mehrnoosh Atashfaraz has completed her PhD at the age of 29 years from Tehran University and postdoctoral studies from Tohoku University School of Engineering. She is researcher, oil and gas expert in National Iranian Oil Refiining and Distribution Company. She has published more than 5 papers in reputed journals

Abstract:

Indium oxide (In2O3) nanoparticles were successfully synthesized via simple rapid hydrothermal method at 400 and 450 C under pressures of 25 and 30 MPa within 10 min. It was found that the highest temperature (450 C) and lowest pressure (25 MPa) condition was preferable to obtain pure cubic crystals of In2O3, because of the higher dehydration rate at 450 C and lower water concentration at low pressure (25 MPa). Moreover, we succeeded in the synthesis of hydrophilic amino-acid-modified In2O3 nanoparticles by the same method at 450 C and 25 MPa within 10 min. 5-Aminovaleric acid was used as the modifier. Changes in the surface properties of the nanoparticles by surface modification were observed by Fourier transform infrared spectroscopy, thermogravimetric analysis, zeta potential, and transmission electron microscopy (TEM), which demonstrated that the reagent chemically bound onto the surface of the In2O3 nanoparticles. The TEM images show that the morphology and size of the surface-modified nanoparticles were spherical with a diameter of 31 nm, respectively. The surface-modified nanoparticles were water dispersible; their isoelectric point shifted to a low pH range because of the nature of the carboxyl group contained in the structure. The synthesized unmodified and surface-modified In2O3 nanoparticles show a unique, wide-range blue–red light emission after excitation at 300 nm at room temperature. These results suggest that In2O3 nanoparticles could have significant potential for applications in optoelectronic devices.

Biography:

Cavus Falamaki obtained his PhD in Chemical Engineering in 1996 from the Amirkabir University of Technology. He was also a PhD exchange student in ETH, Switzerland, during the period 1995-1996. He serves now as the Research Deputy of the Mahshahr Campus of the Amirkabir University of Technology. He has served for more than 16 years as a consultant for various chemical companies in Iran. He has published more than 52 papers in reputed journals, run 9 industrial projects and won two national prizes. He has been the elected first Head of the Central Laboratory of the Amirkabir University of Technology.

Abstract:

TiO2 has been the focus of enormous research activities during the last two decades. In the form of titania nanotube aligned arrays (TNA), the material is now a prominent candidate for the production of hydrogen from water through photo-catalysis. Aiming at the use of sunlight as the sole source of energy, great efforts have been done by the researchers to decrease the band-gap of TNA’s while keeping the recombination process minimal. Here, we will present our latest discoveries regarding the improvement of the photo-catalytic properties of TNA’s through the implementation of multiple doping or use of special quantum dot decorations. Multiple doping (three dopants) through a special one-step chemical route may result in a synergetic effect leading to the reduction of band-gap energy. Special novel quantum dot decorations may also lead to similar highly enhanced photo-catalytic behaviors which will be alluded to in the presentation.

Biography:

Rajesh Nivarti Gacche is a Professor and Head at the Department of Botany, Tumor Biology Laboratory, S.R. T. M. University, India. He has twenty years of teaching & research experience to post graduate classes of Biotechnology, Microbiology and Botany. Published over 75 research papers in the area of “Biomedical Research” in reputed International journals with h-index of 16 and an Impact factor range of 0.5 -10.18. He also has 2 patents to his credit.

Abstract:

Synthesis of metal nanoparticles for improving therapeutic index and drug delivery is coming upas an attractive strategy in the mainstream of cancer therapeutic research. In the present study, curcumin capped copper nano-particles (CU-NPs) were evaluated as possible inhibitors of in vivo angiogenesis, pro-angiogenic cytokines involved in promoting tumor angiogenesis along with inhibition of cell proliferationand migration of breast cancer cell line MDA-MB-231. The anti-angiogenic potential was assessed using in vivo chorio-allantoic membrane (CAM) model. 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazoliumbromide (MTT)-based cytotoxicity assay was used to assess the effect of CU-NPs against proliferation of breast cancer cell line. The wound healing migration assay was used to evaluate the effects of CU-NPs onthe migration ability of breast cancer cell line. Native curcumin (CU) was used as a reference compoundfor comparison purpose. The result of the present investigation indicates that CU-NPs could not demonstrate impressive anti-angiogenic or anticancer activities significantly as compared to native CU. Thepossible mechanisms of experimental outcomes will be discussed in the light of the methods of nano-particle synthesis in concert with the current state of the art literature.

Biography:

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Abstract:

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Biography:

Nagendra Prasad Pathak is an Associate Professor at IIT Roorkee. He has received his PhD degree in Millimeter-wave Integrated Circuits from IIT Delhi, in 2005. He held the position of Post-doctoral research fellow at Tohoku Institute of Technology, Sendai, Japan and CARE, IIT Delhi. He is serving as Vice Chairman of IEEE Microwave Theory and Techniques Society (MTT-S) Uttar Pradesh. He has guided 6 PhD, 26 MTech dissertations and published more than 85 papers in reputed international journals and conferences and has one US patent to his credit. His current research interests are RFICs and Nanoplasmonics.

Abstract:

Plasmonics is a rapidly evolving subfield of nanophotonics that deals with the interaction of electromagnetic wave with surface plasmons, which are collective oscillations that occur at the interface between metal and insulator. Copper interconnects finds limitations (below 100nm regime) because of the reduced circuit size as the power dissipation per unit area is sufficient to raise the local temperature of silicon chip substrate up to the silicon’s melting point. Optical waveguides can provide an appropriate alternative, but failed due to its operation in TE or TM modes where each mode has some cut-off condition depending on the physical size of the waveguide. Due to this cut-off condition, the waveguide dimensions cannot be reduced beyond a certain limit. Further reduction in the size of optical waveguide dimensions are possible only if one can find a mode (other than higher order waveguide modes) which can exist and propagate even when the waveguide is operating under below cut-off conditions of dominant fundamental mode. Plasmonic waveguides are attractive as they support an electromagnetic mode which can carry signal through the waveguide even when operating under below cut-off conditions of dominant mode. In this talk, emphasis will be given to understand fundamental concepts in the design and analysis of multiband and multifunctional nanoplasmonic integrated circuits for the realization of concept of nanoscale wireless links. The modeling of MIM waveguide and its variants along with its applications in the design of multiband resonators, filters, couplers and diplexers will be covered in this presentation.

Biography:

Siva Prasad Peddi has completed his PhD from Osmania University and since then has been serving various institutions indulging in both teaching and administration. He was the Director of an e-learning portal in India before he shifted to Aljouf University in Saudi Arabia. He has authored text books and has many publications in reputed journals and has been serving as an Editorial Board Member of various research journals of repute.

Abstract:

Rare earth doped nanoparticles have been identified to possess excellent crystallographic stability with characteristics that suit their utility in vast applications such as waveguides, coating material under severe reactive conditions, oxide hosts in lasers and their fluorescence properties have been identified to possess multitude of industrial applications. Yttrium oxide is one of the most passable of the yttrium compounds, which finds itself in the midst of fabrication from solid state laser ceramics to high temperature superconductors. RE3+:Y2O3 nano particles have been prepared using samarium and neodymium for the dopant RE3+. Rare earth doped yttrium oxide nano particles were synthesized successfully using a simple and low cost modified precipitation method using urea. Characterization of nanoparticles using XRD indicated the formation of RE3+:Y2O3 nano particles in various crystalline orientations after verification where all the impurity peaks that existed with the powder in its dry form at 300°C vanished after calcination at 900°C. The mean size of the particles has been found to be between 80-150 nm. The mean crystallite size ranges have been estimated from the broadening of diffraction peaks and the results were found to be in agreement with size analysis measurement.

Biography:

Abstract:

Silver and copper nanoparticles are known to have inhibitory, bactericidal effects and catalytic degradation effect on methyl red dye. Several methods about synthesis of nanoparticles have been reported including chemical and physical methods which are associated with environmental concerns. In present study, here, we report biosynthesis of silver and copper nanoparticles using Duranta erecta fruits extract at ambient temperature and pressure. Biosynthesis of nanoparticles is cheap, low cost, non-toxic, high-yield and eco-friendly method. Size and reduction time of Ag and Cu NPs were compared with chemically synthesized hydrazine mediated Ag and Cu NPs. Nanoparticles formation was confirmed by UV/visible spectrophotometry due to the surface plasmon resonance, in which silver show at 447 nm while copper at 597 nm. Percent reduction of metal salts was determined using atomic adsorption spectrometry. The size, shape and morphology of the synthesized nanoparticles were examined using powder XRD and FE-SEM respectively. EDX analysis was performed showing strong signal peak for elemental silver and copper also confirm the formation of nanoparticles. The biosynthesized silver nanoparticles show excellent antibacterial activity and synergistic effect with antibiotic gemifloxacin against human pathogen gram positive, Staphylococcus aureus and gram negative, Escherichia coli as compared to copper nanoparticles. The prepared nanoparticles exhibit excellent methyl red photocatalytic degradation activity proved by decrease in absorbance with time. Besides these, the biologically synthesized silver and copper nanoparticles also show excellent 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity.

Biography:

Mehrnoosh Atashfaraz has completed her PhD from Tehran University and Postdoctoral studies from Tohoku University School of Engineering. She is researcher, oil and gas expert in National Iranian Oil Refining and Distribution Company. She has published more than 5 papers in reputed journals

Abstract:

Indium oxide (In2O3) nanoparticles were successfully synthesized via simple rapid hydrothermal method at 400 and 450C under pressures of 25 and 30 MPa within 10 min. It was found that the highest temperature (450C) and lowest pressure (25 MPa) condition was preferable to obtain pure cubic crystals of In2O3, because of the higher dehydration rate at 450C and lower water concentration at low pressure (25 MPa). Moreover, we succeeded in the synthesis of hydrophilic amino-acid-modified In2O3 nanoparticles by the same method at 450C and 25 MPa within 10 min. 5-Aminovaleric acid was used as the modifier. Changes in the surface properties of the nanoparticles by surface modification were observed by Fourier transform infrared spectroscopy, thermogravimetric analysis, zeta potential, and transmission electron microscopy (TEM), which demonstrated that the reagent chemically bound onto the surface of the In2O3 nanoparticles. The TEM images show that the morphology and size of the surface-modified nanoparticles were spherical with a diameter of 31 nm, respectively. The surface-modified nanoparticles were water dispersible; their isoelectric point shifted to a low pH range because of the nature of the carboxyl group contained in the structure. The synthesized unmodified and surface-modified In2O3 nanoparticles show a unique, wide-range blue–red light emission after excitation at 300 nm at room temperature. These results suggest that In2O3 nanoparticles could have significant potential for applications in optoelectronic devices.

Biography:

Yeojoon Yoon has completed his PhD from Yonsei University and Postdoctoral studies from Korea Electronics Technology Institute. He is working on the application of graphene-based materials to water treatment technologies such as adsorption, catalytic oxidation, and membrane process. He has published more than 20 papers in SCI journals.

Abstract:

Larger graphene sheets can reduce the contact resistance caused by the number of graphene-graphene contacts and enhance the electrical conductivity. Furthermore, larger graphene sheets can be more effective in load transfer while graphene is used as a reinforcement filler in composites. Previous studies, graphite oxide synthesized by the conventional Hummers’ method was exfoliated through sonication process for obtain single layer graphene oxide. However, its lateral size was less than 10um. Additional omnidirectional mechanical energy input, such as sonication, reduces the lateral size of graphene oxide sheets. This lateral size reduction of single layer graphene oxide attribute to the further weakening of graphene sheets resulting from the hydroxyl and epoxy sites functionalized edge and plane of graphene sheets. Here, we describe a facile method to prepare large-area single layer graphene oxide, which uses the exfoliation of graphite oxide in a Couette-Taylor flow reactor. We found that the formation of Taylor vortex flow with shearing stress in the reactor is effective for exfoliation of graphite oxide, which allows for the production of a more than 100μm in lateral size single or few-layer graphene oxide platelets at a high yield of 90% within 60 min of reaction time. The properties of fabricated graphene oxide was examined by field emission scanning electron microscope, Raman spectra, atomic force microscope, x-ray photoelectron spectroscope and x-ray diffraction.

Biography:

Su Yeon Choi received her PhD degree in 2015 at INHA University and joined the Korea Electronics Technology Institute as a Postdoctoral fellow. Her thesis focused on the self-assembled nanostructure of conducting polymers in thin films and solution state. Her current research focuses on the development of graphene-based nanocomposites for various applications such as sensor, photocatalyst and supercapacitor.

Abstract:

We report a simple but strong method to enhance sensitivity and responsibility of graphene oxide (GO) by forming a self-corrugated surface of GO. The self-corrugated surface was formed by the reaction of graphene oxide with Gallium oxide. The surface of GO is more corrugated with the concentration of Gallium oxide during the dry process of GO solution. The GO structure was distorted due to the three hydroxyl groups of Gallium oxide to replace the existing GO structure. The properties of synthesized GO was investigated by scanning electron microscope, energy dispersive spectroscopy, X-ray diffraction, Raman spectra and atomic force microscope, respectively. This GO composite have superior advantages over normal Gallium oxide for a higher organic removal property and responsibility for water treatment.

Biography:

Mohd Yaseen Lone has completed his MSc and MPhil with first division from Barkatullah University Bhopal (MP), India. Currently, he is pursuing his PhD in Physics (Nanotechnology) from Department of Physics, Jamia Millia Islamia, New Delhi, India. His area of interest is synthesis, characterization of single wall carbon nanotubes and their sensor applications

Abstract:

In the present study, single wall carbon nanotubes (SWCNTs) have been successfully grown on Fe based catalyst silicon substrate. The plasma enhanced chemical vapor deposition (PECVD) technique has been used to grow single wall carbon nanotubes (SWCNTs). The Fe catalyst has been deposited by RF–sputtering technique. The thickness of deposited catalyst layer is in a few nanometer range. The catalyst play a great role in controlling the diameter distribution of SWCNTs. The hydrogen was used for the pretreatment of the iron deposited catalyst substrate. The acetylene was used as the carbon source gas. The growth temperature and time has been kept 6500C and 10 min respectively. As per the requirement, parameters have been optimized accordingly. The obtained SWCNTs have been characterized and properly investigated by various techniques like FESEM with EDAX, HRTEM, and Raman spectroscopy.

Biography:

Namrata Tiwari is currently a final year student pursuing an Integrated Dual Degree course that incorporates a BTech in Bio-engineering and MTech in Bio Medical Technology at the School of Biomedical Engineering, Indian Institute of Technology- Banaras Hindu University (IIT (BHU)), Varanasi, India. She has worked as a research intern in the Defence Institute of Technology (DRDO), Pune under the supervision of Dr. H S Panda, Assistant Professor, Department of Material Engineering, Pune and has contributed in a commendable research work.

Abstract:

There is an increased need of materials that can effectively help in the process of cancer diagnosis. Use of luminescent carbon quantum rods in biological investigations has increased dramatically over the past several years due to their unique size-dependent optical properties, low cytotoxicity and good biocompatibility. Photoluminescent carbon based materials, which act as bio label, can be used as fillers in a polymer/inorganic matrix to synthesize a composite material for required application. Layered double hydroxide (LDH) was used as the matrix material as it easily incorporates the bio markers/labels and helps in decreasing the toxic effect the particles might have. We have synthesized a hybrid material consisting of Layered Double Hydroxide (LDH) as matrix and CQRs as filler. CQRs were synthesized using electrochemical method in which graphite rod electrodes were dipped in a basic solution. LDH, which is a multilayered material, was then formed. To further enhance the properties of LDH, CQR was incorporated in situ in it by co- precipitation method in which we took 10 ml of CQD solution in 60 ml of water and adding Mg and Al salt drop wise maintaining the pH at 11 and then heating at 60 degree for 24 hrs. Then, centrifugation was done and the sediment was dried and characterized for obtaining its properties. The composite prepared was characterized by XRD and TEM techniques. The other techniques used were SEM, FTIR, Raman spectroscopy, cell culture, T to T1 relaxation. Further, tests on cytotoxicity have been performed to test the compatibility with living cells.

Biography:

Pankaj Gupta received his MSc degree from Malviya National Institute of Technology, Jaipur, in 2011. Presently he is working as Senior Research Fellow of Ministry of Human Resource Development, New Delhi.

Abstract:

In this study, a convenient, low cost and sensitive electrochemical method based on a disposable gold nano-particles modified screen printed carbon sensor (Au-NPs/SPCs) is described for the simultaneous determination of dopamine (DA) and 5-hydroxyindole acetic acid (5-HIAA). Field emission scanning electron microscopy (FE-SEM) and electrochemical impedance spectroscopy (EIS) were used to characterize the surface morphology of the Au-NPs modified SPCs. The electrochemical measurements were carried out using square wave voltammetry and cyclic voltammetry. The modified electrode exhibited good electro-catalytic properties towards the oxidation of DA and 5-HIAA and the electrochemical potential difference between DA and HIAA was measured to be 230 mV, which was large enough to determine DA and 5-HIAA individually and simultaneously. The anodic peak current of DA and 5-HIAA were found to be linear in the concentration range of 0.2–100 µM and 0.5-500 µM with the detection limit of 8 nM and 22 nM, respectively. The effect of common metabolites presents in human urine such as ascorbic acid, uric acid on electrochemical response of DA (10 µM) and 5-HIAA (20 µM) were also analyzed. It was found that 10-fold concentration of ascorbic acid does not interfere with the determination of DA and 5-HIAA, while higher concentration of UA (more than 60 µM), anodic peak signal for 5-HIAA start to broaden, but the peak of DA remained same. The analytical utility of developed protocol was evaluated by performing the recovery experiments in human urine and plasma samples of healthy persons, showing the recovery in the range 99.20-101.33%.

Biography:

Prashant Jindal has been working extensively in the area of characterization of polymer based nano-composite materials. He completed his PhD in 2014 from Panjab University, Chandigarh, India. He has many publications in journals like Composites Part B: Engineering, Materials & Design, etc.

Abstract:

In this paper, we aim to enhance the static and dynamic mechanical strength of Acrylonitrile-Butadiene-Styrene (ABS) terpolymer by constituting it with small compositions of Multi Walled Carbon Nanotubes (MWCNTs). Composites of ABS/MWCNT were fabricated with various MWCNT compositions (1, 3, 5, 7, 10 wt%) in ABS. These were then characterized to obtain quasi-static mechanical properties like hardness and elastic modulus using nano-indentation technique. It was observed that hardness and modulus for 10 wt% MWCNT composition in ABS/MWCNT composites were enhanced by 49% and 61% respectively in comparison to pure ABS. The visco-elastic nature of ABS/MWCNT composites was also investigated at nano scale using Dynamic Mechanical Analysis (DMA). Properties of ABS/MWCNT composites and pure ABS specimen were compared in dynamic mode for a loading frequency upto 200 Hz and it was observed that modulus of 10 wt% ABS/MWCNT composite was consistently higher by nearly 58% to 75% (upto 200 Hz) in comparison to that of pure ABS. The maximum strength for these composites under variable loading frequencies was achieved at lower loading frequencies, which indicated that properties of these composites enhanced up to loading frequencies of 100 Hz. Therefore, significant enhancement in mechanical strength of ABS was observed by composing minor compositions of MWCNTs (upto 10 wt%) without noticeable alteration in their weights, hence improving the prospects of ABS being used for engineering applications.

Biography:

Hanan Abd Ali Thjeel Al-Ogaili has completed her Master’s and BSc from Baghdad University in Physical Science. Now, she has scholarship to complete PhD in United Kingdom. She is a tutor at Wassit University College of Science in Physics Department for ten years. She has published more than 8 papers in reputed journals and has been working in Nanotechnology Group in the University of Baghdad.

Abstract:

In this work, the zinc sulfide (ZnS) nanoparticles were synthesized by simple chemical route at room temperature and using zinc chloride powder (ZnCl2) and sodium sulfide powder (Na2S) as basic materials, ZnS nanocrystals were measured by X-ray diffraction (XRD), ultraviolet–visible spectroscopy (UV-VIS) and fluorescence (PL) spectrophotometry. The optical properties and structure of nanoparticles had been investigated. The results showed high absorbance in near UV regions of spectrum, while the grain size of ZnS nanoparticles had calculated to be approximately (1.94- 2.75) nm from XRD test and optical energy gap of the nanoparticles was found to be in the range of 3.8eV. Photo luminescence (PL) spectra of the samples had illustrated blue-light emission when the samples were excited by UV light with wave length at 250 nm. Also, the PL results observed that the bands emission (multiple peaks) were broad and strong and were centered at three positions at 310 nm, 350 nm and 400 nm.

Biography:

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Abstract:

Silver nanoparticles were successfully prepared by eco-friendly and cost effective aerial roots of Rhaphidophora aurea (Linden ex Andre) extract which act as a reducing agent by green synthesis method. The visual color change from colorless to yellow to brown was helpful in confirmation of AgNPs formation. UV Visible (UV-vis) spectroscopy was used to follow the gradual formation of NPs and power X-ray diffraction (XRD) confirmed the face centre cubic crystal structures in software in JANA2006, Edit+3. XRD studies revealed a gradual crystal-lite size reduction at different molar ratios of extract silver salt. The crystallite size was calcu-lated using Debye-Scherer’s formula and found to be in the range 30 nm. Morphology and characterization of AgNPs was done by using FESEM, HRTEM, FTIR and EDAX techniques. FESEM and HRTEM analysis showed that the morphology of the obtained AgNPs was spherical shaped which can be used in variety of biomedical and pharmaceutical applications. The antibacterial actives and mechanism of silver nanoparticles are examined using Escherichia coli, Streptococcus mutants, Bacillus subtilis and Pseudomonas aeruginosa respectively by analyzing the growth permeability and morphology of the bacterial cells following with AgNPs.

Biography:

M A Jafarov was a student in Faculty of Physics, Baku State University, Baku, Azerbaijan from 1977 to 1982. He received the M.Sc. degree (with highest Honors) from the same university in 1982. He was a Post-graduate student in Institute of Photo-electronics, Azerbaijan National Academy of Sciences, Azerbaijan from 1982 to 1986. He received the PhD degree in the field of Semiconductor Physics from the same institute in 1989 and was a D.Sc. degree in the field of “electronic processes in single crystals of any A2B6 type compounds and in films on their basis, chemically deposited from solution” and is a Professor since 2010.

Abstract:

The II–VI semiconductor nano-crystals exhibit interesting properties and their emission spectra is narrow (spectrally pure) and the emission color is simply tuned by changing their size. As the nano-crystal size decreases, the energy of the first excited state decreases qualitatively following a particle-in-a-box behavior. This size dependence and the emergence of a discrete electronic structure from a continuum of levels in the valence and conduction bands of the bulk semiconductor result from quantum confinement; hence, semiconductor nano-crystals are referred to as quantum dots). Nanostructure ZnCdS thin film was fabricated onto cleaned glass substrates with thickness 100 nm by flash deposition technique. Cleaning of substrate is important in fabrication of thin films, because it greatly influences the properties of the films deposited on it and has strong effect on the adhesion properties of the deposited films. The electrolyte was prepared by dissolving 6mM CdCl2, 5mM CdSO4, 0.15mM Na2S2O3 and 0.2M NaOH in water. Due to the low solubility of Na2S2O3 continuous heating and stirring for several hours is required. The pH of the final electrolyte was adjusted to 3.5 with H2SO4.. After preparing the nPS samples by using the Electrochemical etching process, the Nanostructure ZnCdS thin films with thickness 100 nm were deposited on the porous silicon layers; this is achieved by using Flash evaporation technique for preparation Nano-ZnCdS/PS hetero-junction. The crystallographic structure of films was analyzed with x-ray diffractometer using Cu-Kα (λ=1.54Å) radiation. Diffraction patterns have been recorded over the 2θ range of 20o to 60o. The surface morphology and roughness of prepared samples were obtained by atomic force microscopy (Scanning probe Microscope type AA3000), supplied by Angstrom Advanced Inc. in non-contact mode. The transmission spectrums of Nanostructure ZnCdS thin film was obtained using UV-Visible recorder spectrophotometer in the wavelength range (200-1100) nm. The electrical measurement for Nano-ZnCdS/PS hetero-junction, which was prepared at constant substrate temperature with different etching times of nPS layers, includes current-voltage characteristic measurements in the dark and under illumination conditions.

Biography:

Michaela Jakubickova is PhD student from Technical university of Liberec. She is in the third year of study. She focuses on photocatalysis in her disertation work. She had a traineeship in the Ireland like researcher in microbiology laboratory. She has published more than 5 papers reputed jurnals.

Abstract:

The most frequently used photoactive composite materials are based on titanium dioxide. These composites are capable to convert solar energy into chemical energy to oxidize or completely mineralize the adjacent molecules. This work is focused on the photocatalytic degradation of microorganisms by the prepared TiO2/SiO2 nanocomposite and on its antibacterial characterization. The intention of this work is the nanocomposite application on the building objects and other available surfaces in order to improve their quality and to reduce deteriorating processes caused by biology pollutants such as algae, lichens, bacterias etc. The photocatalytic material TiO2/SiO2 was prepared. For the antibacterial activity characterization the ISO standard method was used - test method for antimicrobial activity of photocatalytic Semiconducting materials. The antibacterial effect was tested on the bacteria Escherichia coli. We proved the strong antibacterial efficiency of the prepared TiO2/SiO2 composite and its ability to improve building surfaces conditions.