14^th International Conference on Nanomaterials and Nanotechnology March 30- 31, 2017 Madrid, Spain

Biography:

Constantinos Sioutas is the first holder of the Fred Champion Professorship in Civil and Environmental Engineering at the University of Southern California (USC). His research has focused on investigations of the underlying mechanisms that produce the health effects associated with exposure to airborne ultrafine particulate pollutants generated by a variety of sources. He has developed many state-of-the-art technologies used by many academic institutions and national laboratories for aerosol sampling and characterization. He has authored over 300 peer-reviewed journal publications, and holds 13 US patents in the development of instrumentation for aerosol measurement and emissions control. His work has been cited in more than 15,000 scientific publications. He is the recipient of the American Association for Aerosol Research (AAAR) David Sinclair Award in 2014 (AAAR’s highest distinction), the Hagen Smit Award of Atmospheric Environment for Seminal Publications, the 2010 Scientific and Technological Achievement Award by the US Environmental Protection Agency, and a Fulbright fellow.

Abstract:

To determine the organic constituents of ambient ultrafine particles (<0.18 um) and quantify the source contributions to PM0.18 organic carbon (OC), a sampling campaign was conducted at Central Los Angeles (LA) from 2012-2013. A novel hybrid molecular marker-chemical mass balance model was introduced and applied to estimate the contributions from mobile sources (including gasoline, diesel, and smoking vehicles), wood smoke, primary biogenic sources, and anthropogenic secondary organic carbon. Based
on the model output, a 57% decrease in contribution of mobile sources to the total OC from 2009 to 2013 was estimated. Comparison to previous studies in Central LA indicated significant reduction in concentrations of carbonaceous species such as polycyclic aromatic hydrocarbons druing the past decade. The analysis of historical trends in ambient PM oxidative potential measured by dithiothreitol (DTT) assay enabled us to assess the relative importance of tailpipe and non-tailpipe emissions on DTT activity in this area. Ambient PM0.18, the toxicity of which was found to be mainly dominated by tailpipe emissions, showed a consistent decrease in DTT activity levels in the past decade, likely due to major reductions in tailpipe emissions as a result of stringent regulations on mobile sources in the LA basin. Despite major reduction in ambient PM2.5 levels and vehicle tailpipe emissions, a slight but consistent increase in
the DTT redox activity of larger particles (PM2.5) was observed in the past decade. A follow-up on-road sampling campaign was conducted using a mobile instrumentation platform on major freeways of Los Angeles revealed the important role of both tailpipe and non-tailpipe traffic emissions on the overall oxidative potential of PM2.5. Increased contributions of certain groups of metals and trace elements that are indicators of non-tailpipe emissions compared to previous studies provide evidence on the increasing importance of non-tailpipe emissions to the oxidative potential of on-road PM2.5 as vehicule tailpipe emissions becomes cleaner.

Biography:

Carlo Naddeo is a Physicist currently in service at University of Salerno - Department of Industrial Engineering as Assistant Researcher. He actively collaborates in research activities related to the study of physical properties and durability of functional and structural polymeric materials and nanocomposites. As part of these collaborations, he has produced over 50 publications in international journals and more than 40 contributions at conferences.

Abstract:

Thermal management with conductive polymeric nano-composites has become a central task of industrial interest for many applications ranging from exchangers in electric and electronic systems to electronic packaging and photovoltaic devices. In order to enhance the thermal conductivity of polymeric composites there is a tendency to incorporate thermally conductive nano-fillers in the polymeric matrix. Actually the most widely used are the carbon nanotubes (CNTs) due to their outstanding mechanical, electrical and thermal properties together with a high aspect ratio and surface area. The incorporation of CNTs into the polymer matrix has significantly enhanced mechanical and electrical performance of final composite material but until now the desired enhancement in thermal conductivity has not been achieved. The aim of this work is to carry out a preliminary experimental investigation of thermal properties and heat conduction in epoxy nanocomposites prepared by dispersing low concentrations of different kinds of nanofillers, such as 1-D multiwall carbon nanotubes and 2-D predominant shape exfoliated graphite (EG) within an aeronautic resin based on a tetrafunctional epoxy precursor. For the analyzed epoxy formulations the best results are obtained using EG as nanofillers. The curing degree for the EG-based epoxy  nanocomposites cured up to 200°C is very high compared to unfilled epoxy resin, reaching up to 100%. EG nanoparticles also accelerate the curing process of the epoxy resin of about 20°C and this is most likely due to better phonon conduction through carbonaceous nanostructures with predominantly  two-dimensional flat shape. This is confirmed by experimental values of thermal conductivity that show an increase of 300% for 3% of Exfoliated Graphite embedded in tetrafunctional epoxy resin. In light of these results it is clearly evident the potential of 2-D graphene sheets as promising nanofillers able to meet the ambitious requirements in the thermal management for high-performance nanocomposites.

Biography:

Ramon J Peláez obtained his PhD from Valladolid University and obtained his first Post-doctoral training at Laboratoire Aime-Coton (CNRS). He is currently a research fellow Post-doc at the Institute of Optics (CSIC). He has published more than 45 papers in specialized and peer-reviewed journals. His research interests in the field of nano-materials include periodic nanostructured materials, plasmonic metal nanoparticles, nanostructures generated by pulsed laser deposition and laser induced dewetting.

Abstract:

Optical phenomena related to the electromagnetic response of metals led to the development of the emerging field of plasmonics. Electron density of metal nano-particles can couple with the electromagnetic radiation and plasmons are the oscillations of the free electrons related to the formation of a dipole in the nano-particle. The progress in the manipulation and synthesis of these objects in the last years allowed us to apply these optical properties in a great variety of applications from efficient light absorption in solar cells to DNA spectroscopy detection. Today, one of the major challenges is the effective production of surfaces with customized visual color effects with direct applications in the development of personal identification systems according with the quest of the enhanced police security. Laser interference is a versatile technique for the production of 1D and 2D patterned surfaces. When applied to metal films, the laser irradiation induces the periodic dewetting of the metal from the substrate resulting in the formation of nanoparticles. These nanostructures are optically characterized by their surface plasmon resonance in the visible range, which in turn depends on the size or metal composition. Optical contrast between the regions transformed into nanoparticles and non-transformed regions (diffraction efficiency) can be tuned. In this work we report the production of bimetallic diffractive structures, with different [Ag]/ [Au] ratio and different motives within periodicities in the range between 1.7 microns to 6.8 microns. We will present experimental data showing that these regions have different diffraction patterns according with the periodic motive and the optical response of the nanoparticles. Thus, this technique allows a personalized optical signal to be encoded with a time-efficient and single-step laser technique.

Biography:

Y Huttel is Doctor from the University of Paris-Sud, Orsay, France (1995). After his degree, he worked at the Synchrotron LURE, France; at the University of Paris-Sud, France; and at the ICMM-CSIC, Spain. He was also a Postdoctoral Researcher at the Synchrotron of Daresbury Laboratory, UK, before returning to the CSIC at the IMM. He joined the Surfaces, Coatings, and Molecular Astrophysics Department at the ICMM that belongs to the Consejo Superior de Investigaciones Científicas (CSIC), Spain, with a Ramón y Cajal Fellowship. Since 2007, he has been working at the ICMM as a Permanent Scientist and leads the Low- Dimensional Advanced Materials Group. His research focuses on low-dimensional systems including surfaces, interfaces and nanoparticles, as well as XMCD, XPS and nanomagnetism.

Abstract:

The increasing demand of pristine nanoparticles in nanotechnology is driving a strong effort in finding new methods and technologies for the synthesis of nanoparticles (NPs). Although the wet chemistry methods are the most popular due to their relative low cost and mass production capacities, the gas phase synthesis of NPs is getting more attention thanks to its specific advantages. This physical method is based on the evaporation of a given material (that could be performed by Laser ablation, evaporation, sputtering, etc.) followed by a controlled aggregation of the produced ions and neutrals in order to produce clusters or
nanoparticles. Since the whole process can be performed under well-controlled environment (vacuum or ultra-high vacuum) the produced nanoparticles have the same chemical composition as the base material that has been evaporated and lack of contaminants. Also the gas phase method produces quite narrow size distributions that can be tuned and even improved by the use of filtering techniques and it produces NPs that are free of ligands or surfactants that can be deposited or embedded directly on surfaces and matrices. This talk will be devoted to magnetron based Ion Cluster Sources (ICS) that have proven to be well-suited for the fabrication of pristine NPs. After a brief review of the ICS, I will address some issues that have limited the use of the ICS in industrial processes and present solutions for the scaling-up of the technology. In particular, through examples I will present the so-called Multiple Ion Cluster Sources (MICS) that has been shown to be very versatile for the production of alloyed and core-shell NPs.

Biography:

Enric Bertran-Serra is a Professor of Applied Physics of Barcelona University and a Member of the IN2UB (Institute of Nanoscience and Nanotechnology of Barcelona University). He is the Director and a responsible Scientist of FEMAN research group on Physics and Engineering of Amorphous Materials and Nanostructures. At present, he is enrolled as a Coordinator of the project SUPERCAPS of the MICINN of Spain, to produce supercapacitors based on graphene. He has published more than 200 papers in reputed journals and is the author of more than 15 patents.

Abstract:

The phenomenology related to the growth of fullerene and graphene based nanostructures leads to a varied morphology, which depends critically on growth conditions. How to control this morphology through technology is a task requiring an exploration of new ways and modification of widely extended technologies like the classical chemical vapor deposition. In this presentation, we take a walk through a series of results achieved in our research group, with the intention of ordering in some way the many
graphene and fullerene forms found and the CVD based technologies used. The resulting morphology is extremely varied and critically dependent on the growing conditions like precursor nature, gas mixture, temperature, pressure, plasma, gas flow rate. Also, resulting morphology depends on substrate nature and its structure, and surface morphology. We have explored different conditions and substrates like copper and stainless-steel foils, Cu/c-Si, Ru/c-Si, SiO2/c-Si, quartz, Cu/quartz, in order to find the
carbon nanostructures characteristics more suitable for applications like electrodes, and planar sensors and devices.

Biography:

Sean Reza Taklimi, currently, is a PhD candidate in the Mechanical Engineering Department of Wichita State University (WSU), USA. He has expertise in functionalization and characterization of nanomaterials, specifically, carbon nanotubes. He received his Bachelor’s degree in Chemical Engineering from Sharif University of Technology in Iran and Master of Science in Mechanical Engineering from Linkoping University, Sweden. His PhD research work is mainly focused on improvement of the mechanical properties of composite materials, using different types of nanomaterials. In the past, he has also worked as Research and Development Engineer in the area of energy and environment; furthermore, he has participated in and managed different projects during his job.

Abstract:

Functionalization of carbon nanotubes with helical configuration was performed through a reflux technique; furthermore, the influence of time and temperature as two key parameters of the treatment process were investigated. To evaluate the effectiveness of the process parameters, the functionalized helicoil nanotubes (HCNTs) were analyzed using various characterization instruments such as, Raman Spectroscopy, Visual Dispersion Test, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray Diffraction Spectroscopy (XRD). The characterization results showed that most processes parameters were effective and the surface of HCNTs were successfully modified. The functionalized HCNTs demonstrated a higher solubility and more uniform dispersion rate compared to pristine HCNTs. The results also showed that increasing the reflux time and process  temperature had no obvious effects on the solubility of HCNTs. On the other hand, prolonging of process time increased the (D/G) ratio in Raman spectrum and changed the intensities and places of the FTIR peaks. With the exception, for the functionalized HCNTs which were treated for 24 hours, all other samples exhibited at least a change in FTIR spectrum.

Biography:

Swasti Wagh has completed her MSc in Applied Mathematics in the year 1999. She is fighting with F.A. since last 25 years and now she is on a wheelchair. She has some research publications on Magnetic Fluid. Recently, her paper on Mathematical Modeling of F.A. is accepted for publication. Since last 10 years, she is organizing camps for ataxia awareness and for the welfare of ataxia patients. She gave a presentation at SNCI conference held at AIIMS, Delhi in Feb 2013 and a presentation in DSHD congress on FA held at AIIMS, Delhi in April 2015.

Abstract:

In last two decades nanotechnology has brought a revolution in the advancement of material science, biology, biotechnology, genetics, medicine and many other areas of science and engineering. The ability of nanotechnologist to prepare material particles of nano size, coating them with a suitable surfactant and magnetizing these particles has made possible to study micro level biological entities such as cells, genes and proteins. In recent years magnetic nanoparticles have been used in cancer treatment, drug delivery and in many other medical fields. This leads us to think why this technology should not be introduced in F.A. research for which no treatment is available and patients suffer with lethal neuro- degenerarative condition of F.A. making them totally dependent on others for even the simple day to day activities. The disease is genetic and unknowingly passes on in off-springs through the carrier parents. It is therefore necessary to control degeneration in F.A. patients and make their life comfortable. Friedreich’s ataxia (FRDA) is an autosomal recessive inherited disease caused by (GAA) expansion of the FXN (frataxin) gene. FRDA is predominantly a neurodegenerative disease. It manifests in initial symptoms of poor coordination such as gait disturbance; it can also lead to scoliosis, heart disease (cardiomyopathy) and diabetes. FXN gene produces frataxin protein which is localized to the mitochondria. The function of FXN is not entirely clear, however, the primary role of FXN protein is the activation of iron-sulfur (Fe-S) cluster biogenesis in the mitochondria. In F.R.D.A. production of FXN protein is reduced. In affected individuals level of FXN drops approximately 5 to 30% than healthy individuals. The role of FXN protein is that of an iron chaperone, a companion of iron particle. Low FXN levels lead to insufficient biosynthesis of iron-sulfur clusters that are required for mitochondrial electron transport chain to ultimately generate adenosine triphosphate (ATP), the energy packet necessary to carry out metabolic functions in cells. FXN also regulates iron transfer in the mitochondria in order to provide a proper amount of reactive oxygen species (ROS) to maintain normal processes
without FXN, the energy in the mitochondria falls, and excess iron causes extra ROS to be created, leading to further cell damage. Nanotechnology can be useful to solve this problem. We can introduce body compatible magnetic nanoparticles to pickup iron particles and direct them to sulpher to form iron-sulpher clusters. Thus iron-sulpher clusters can be formed even in the absence of FXN protein in F.A. patients. And thus the process of respiration in mitochondria will continue to produce energy in the form of ATP. As iron particles are utilized in formation of iron-sulpher clusters no free iron is left to get deposited on cells and cause cell death in FRDA patents.

Biography:

Lauryanne Teulon is currently a PhD student in INSA – Université de Toulouse, LPCNO. She has completed her graduation from the Engineering School of Centrale Marseille. She is now studying anti-counterfeiting tags made by an innovative technique, so called AFM Nanoxerography. Her research interests are nano-objects directed assembly, nanogels and microfluidic devices.

Abstract:

This work presents a simple approach for directionally assembling thermoresponsive colloidal nanogels onto surfaces in minutes using AFM nanoxerography. Charge patterns written by AFM are used as electrostatic traps to obtain complex directed assemblies of anionic nanogels (N- isopropylacrylamide copolymerized with acrylic acid) and cationic nanogels (using quaternary
ammonium functional groups). Mixed dispersions of these two types of hydrogels are also selectively sorted onto combinations of negative and positive charge patterns in various manners depending on the ratio between the concentrations of each nanogel type. Taking advantages of the fast and high resolution nanoxerography technique, this work offers a new way to separate soft nanoparticle aqueous dispersions onto surfaces. It also allows one to obtain information about the effective charge and proportion of the different nanoparticle species present in mixed colloidal dispersions and to make enviro-intelligent and tunable coatings.

Biography:

Bin Dong is currently a PhD student at International Doctoral Innovation Centre, University of Nottingham Ningbo China. His research expertise is on materials fabrication, characterisation and electrochemistry.

Abstract:

An impinging stream reactor has been adopted for synthesis of nanoscale FePO4.2H2O particles. The experiments indicate that the application of the impinging streams is able to significantly enhance the mass transfer rate of the reactant solutions through strong turbulent eddy interactions due to the impingement of two narrow reactant streams at high velocities. The FePO4.2H2O nanocomposites were synthesised under the conditions that pH value (pH=1.2, 1.4, 1.6, 1.8 and 2.0), reagent concentration (C=0.5, 1.0 and 1.5 mol L-1), and volumetric flow rate (V=17.15, 34.30, 51.44, 68.59 and 85.74 mL min-1) were precisely controlled. Effects of the pH value, reagent concentration, and volumetric flow rate on synthesis of FePO4.2H2O nucleus have been studied when the impinging stream reactor is to operate at nonsubmerged mode. The as-synthesised FePO4.2H2O and corresponding LiFePO4/C prodcuts were characterised by applying XRD, SEM and charge-discharge test. It has been demonstrated that under the optimised opertation condition (pH=1.6, C=1 mol L-1, V=85.74 mL min-1), the LiFePO4/C possesses the best charge-discharge performance while the discharge capacities is able to reach 152.6, 146.9, 139.1, 130.4 and 118.2 mAh g-1 at 0.1 C, 0.5 C, 1 C 2 C and 5 C current rates, respectively. It was revealed that the LiFePO4/C synthesised at pH=2.0, C=1 mol L-1, V=85.74 mL min-1 has the most stable cycling performance with the discharge capacities reaching 140.6 and 141.8 mAh g-1 at a rate of 0.5 C at the first and the 100th cycles, respectively.

Biography:

Heba ElSayed ElZorkany received her BSc in Biotechnology from Benha University in 2006. She joined the National Institution of Laser Enhanced Science, Cairo University as a Post-graduate student and she was awarded with a Diploma degree in Laser Applications in Biotechnology and Photobiology in 2008. She completed her MSc degree in 2013 “The photothermal effect of metallic nanoparticles on bacteria”. She has enrolled in the PhD program at NILES, since 2014 to conduct her thesis titeled “Efficiency of biocompatible quantum dot for cellular imaging using confocal laser scanning microscope”. She has been appointed as a Researcher at Nanotechnology and Advanced Materials Central Lab. (NAMCL), Agriculture Research Center (ARC) since 2010. Her research experiences include biotechnology, microbiology, photobiology, laser applications in biology, nanotechnology, spectroscopy, and microscopy. She is a Confocal Laser Scanning Microscope (CLSM) & Cell Culture Specialist. She has participated in several international conferences.

Abstract:

The fast-growing nanotechnology provides every day new type of materials to fulfill the biomedical needs. Whereas infections caused by pathogenic multidrug-resistant bacteria has become one of the most worrying problems that the human health and economy suffer from and what makes the development of new effective alternatives to classical antibiotics an urgent need. Nanotechnology has generated a novel class of photothermally sensitized agents –gold nanoparticles (AuNPs). Depending on the phenomenon of surface plasmon resonance of noble metal nanoscale particles new therapy has been established called plasmonic photothermal therapy (PPTT). PPTT has attracted new interest in cancer therapy and also against microbes. The current research aims to assess the PPTT of AuNPs against Gram-negative Escherichia coli (E. coli) and Gram-positive Bacillus cereus (B. cereus) bacteria. Different concentrations of AuNPs capped with different polymers (polyvinyl alcohol (AuNPs -PVA) or Polyvinylpyrrolidone (AuNPs -PVP) were applied on E. coli and B. cereus in dark and under the irradiation of several doses of the light emitting diode (LED 530 nm). Results showed that the maximum antibacterial effect occurred at 10 μM of AuNPs -PVP in the presence of 0.9 J/cm2 of LED. Finally, it was concluded that PPTT with gold nanoparticles considered as an effective method for bacterial eradication as AuNPs induce hyperthermia in the surrounding environment of bacteria upon irradiation which causes cell damage. Also, the capping material of AuNPs plays an important role in its biological effect.

Biography:

Amparo Luna received her Bachelor´s degree in Chemical Engineering, Instituto Tecnológico de Veracruz in 1996 and PhD degree in the Organic Chemistry Program in 2002 from the Universidad de Oviedo, Spain, under the supervision of Prof. Vicente Gotor and Dr. Covadonga Astorga. In 2003, she joined the research group of Prof. Roland Furstoss at Faculté des Sciences de Luminy (Lab. Associé au CNRS, in Marseille (France) as a  Post-doctoral fellow. In 2004, she moved to the research group of Prof. Benito Alcaide (UCM, Madrid) where, in 2006, she was appointed as Assistant Professor and in 2015 she assumed a position of Associate Professor. Her research interests are focused on beta-lactam and allene chemistry, and metal-catalyzed coupling reactions.

Abstract:

Allenes are a class of compounds with two cumulative carbon-carbon double bonds, which are versatile synthetic intermediates in organic synthesis. These substrates have allowed chemists to prepare a variety of compounds of chemical and biological interest. The abundance of nitrogen-containing heterocycles in biologically active  molecules has occasioned many efforts for their synthesis and functionalization. In particular, the oxacycles is important because they are present in a wide range of natural products. On the other hand, in the design of eco-friendly processes, catalysts and solvents play a key factor from both an economic and environmental point of view. In the development of new chemical processes the reactions conditions should fulfill specific criteria: i) renewable feedstocks, ii) low VOC emission, iii) low flammability and iv) functional group compatibility. In our continuing efforts on the construction of potentially bioactive heterocycles, we have developed a new catalytic process using metal nanoparticles because of; NPs tend to be more reactive than their particulate metal counterparts as a result of increasing surface area with decreasing particle size. Palladium nanoparticles are one of the most used and efficient catalyst in the formation of C-C bond and other chemical transformations such as carbon-hetero atom bond formation. Herein, we described the use, for the first time, of a novel ligand-free catalytic system for obtaining the cyclization of allenols towards the preparation of  dihydrofurans and carbazoles. The prepared nanomaterial (PdNPs) displayed good activity on the construction of potentially bioactive heterocycles in aqueous media, providing good to excellent yields. The recyclability of the nanocatalyst has also been established (up to four cycles) giving rise to good isolated yields in successive runs.

Biography:

Nadezhda Nebogatikova has her expertise in the area of graphene functionalization, graphene quantum dots, suspensions and inks for 2D-inkjet printing. She has found an approach to create different fluorinated graphene-based materials. Her investigations of graphene fluorination opened new pathways for improving graphene-based devices with a wide range of electronic and structural properties. She has 14 publications and worked at Rzhanov Institute of Semiconductor Physics SB RAS in Novosibirsk since 2010.

Abstract:

Graphene electronics needs new materials with tunable electronic properties due to a set of excellent electronic and structural graphene properties and the zero band-gap in its electronic structure. The traditional pathways to open the bandgap in graphene layers are nanolithography. Unfortunately, there is a dramatic decrease in carrier mobility due to chemically active dangling bonds near the formed edges. The stability of graphene-based nanostructures without edge atoms has been investigated recently. One can create such materials by embedding graphene islands into a stable matrix. Such approach was realized in our previous studies of graphene layers and suspensions fluorination. Another decision is to cut holes in neighboring graphene layers and to bond the chemically active atoms from different layers forming a closed structure of sp2-hybridized carbon atoms. We used high energy ions (26-167 MeV) to create perforated few-layer graphene films. Both scanning electron microscopy and atomic force microscopy both demonstrate nanosized holes (20-40 nm in diameter) formed by ions irradiation. The initial ions energy determines the amount of  electronic loss and the value of a sharp local temperature rise in the films. As a consequence, the type of the holes edge may be reconstructed in the range from the dangling bonds to connected edges. We observed the bandgap and electric active traps appearance, dependently on ions energy. We found the conditions for tuning the film electronic and structural properties. The formation of a continuous graphene surface between two perforated layers is very attractive as well as for nanoelectronic devices because of the band-gap appearance in its electronic band structure, opportunity to save the carrier mobility and capability to transmit high electric currents in contrast to nanostructured graphene and semiconducting graphene nanoribbons. Moreover, such nanostructures are promising for sensors and molecule filters.

Biography:

J Vidal-Gancedo is a Tenured Scientist at the Materials Science Institut of Barcelona, ICMAB-CSIC and Researcher at the Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain. He obtained a PhD in Chemistry from the University of Barcelona in 1993. Actually also he is Scientist In-Charge of the ICMAB Electron Paramagnetic Resonance Laboratory and President of The Spanish Electron Paramagnetic Resonance Group, GERPE. His research interest focuses on molecular functional materials based on organic radicals, molecular nanoscience, and nanomedicine. He authored of more than 145 journal papers in peer reviewed journals including several book chapters and 3 patents. His work have received more than 3000 citations and his h factor actualy is 31.

Abstract:

A series of Au nanoparticles functionalised with high coverage of TEMPO-modified disulfide have been prepared and studied by EPR, UV-Vis, TEM microscopy, Energy Dispersive X-ray analysis (EDX) and Thermogravimetric Analysis (TGA). In order to increase the coverage of spin labels on the particle surface, heat-induced size evolution and ligand exchange reactions were used. A one-pot reaction at room temperature led to gold nanoparticles with a controlled large size (ca. 7 nm) and high coverage of radicals. These nanoparticles showed a |Δms| = 2 transition at half-field which gives direct evidence of the presence of a high-spin state and allows an EPR study of the nature of the magnetic coupling between the spins. The results showed dominant antiferromagnetic interactions between radicals but at lower temperatures a ferromagnetic contribution was observed. The same diradical has been studied in solution, crystal and anchored to Au (111) flat surface showing anisotropic magnetic properties. We have also synthesized gold nanoparticles functionalized with high coverage of nitronyl nitroxide radical that preserve the same thermally modulated spin exchange radical interaction observed for the diradical in solution. This result has significant importance for developing functional hybrid surfaces and opens the possibility to be used as a new class of spin markers.

Biography:

Yo Tanaka received his PhD degree from the University of Tokyo. He worked as an Assistant Professor in the Department of Applied Chemistry, School of Engineering, University of Tokyo, and has been working as a Unit Leader in the Quantitative Biology Center, RIKEN, Japan, since 2011.

Abstract:

A microchip (also called as micro fluidic chip or micro chemical chip) is a palm sized small board with micro and nano fluidic channels fabricated by micro or nano machining techniques. It is widely utilized for the integration of complicated chemical and biochemical experimental processes. This is a spin-off technology from integrated circuit fabrication techniques in the field of electronics and information technology. Currently, it is applied to various wet processes in chemistry and biology and a number of sophisticated systems have been developed till now. There are several advantages including, saving the amount of chemical reagents and short analysis time. By exploiting these significant advantages, various kinds of chemical systems such as analysis, synthesis and cellular experiments have been integrated onto a microchip. Regarding this microchip technology, the author has developed several original technologies on fabrication, fluid control and construction of mechanical devices for bio-analysis. For example, totally glass based micro valves, pumps, filters and ultra-thin, flexible glass microchips as shown in Figure 1 have been demonstrated based on an
ultra-thin glass sheet handling techniques. In this work, these achievements are comprehensively introduced.

Biography:

Marta Lara-Lledó is an Agricultural Engineer specialized in Food Industries from Polytechnic University of Valencia (UPV). She has a Master’s and a PhD in Food Science and Engineering (UPV) and a Diploma in Packaging from Instituto Tecnológico del Embalaje, Transporte y Logística (ITENE). Since 2007, she is Technical
and Project Manager of New Materials and Packaging Systems department at ITENE. Nowadays, She is responsible for the Food Safety Area. She is working on several R&D projects specifically related to food packaging. She is specialized in the development, characterization and authorization of new packaging materials,
including the implementation of food contact materials legislation and verification processes for the proper performance and good manufacturing practices of the packaging materials.

Abstract:

Nanoparticles can be used in food contact materials to improve barrier, mechanical and thermal properties of biodegradable materials. The use of nanoparticles also allows the development of lightweight non-renewable polymers, maintaining their barrier, mechanical and thermal properties with less thickness. The use of nanoparticles is also possible for the development of active and intelligent materials with improved properties. Focusing on the improvement of biodegradable polymers properties, the formulation of organoclays and their incorporation into a PLA matrix allowed an increase of its barrier properties (↓ 25% OTR, ↓ 21% WVTR), mechanical properties (↑ 40-45% compression resistance) and an improvement of thermal properties. The reinforcement of barrier and mechanical properties of a PLA matrix was also using nanocelluloses extracted from different plants by-products (flax, hemp, oat, etc.). According to the plastic European Regulation for food contact materials (EU) Nº 10/2011, chemical and physical properties of nanoparticles could differ from those at large scale, leading to different toxicological properties. Therefore, case-by-case, risk assessment should be performed, and they can only be used if explicitly authorized and mentioned in Annex 1 of the plastic regulation. In the recent years, a notable increase in the number of authorized nanoparticles for food contact applications has been noticed in Europe, but harmonized measurement methods must be still developed to obtain consistent results over time and between laboratories. For the authorization of nanoparticles in US, a safety assessment should be also performed through a Food Contact Notification Program or alternative programs such as Threshold of Regulation (TOR) exemptions. The authorization procedures should be considered for the commercialization of these materials for food contact applications.

Biography:

Krishnamurthy G has completed his MPhil and PhD from Bangalore University after his Master’s in the same University. He is having a total of 16 years of teaching experience. During his tenure as Sir C V Raman Post-doctoral Fellow (2013-2014), he visited Lawrence Berkely National Laboratory, Berkely, CA, US. His research interests lie in nano/energy materials, electrochemisty, bio-medical materials, etc. He has published 28 papers in reputed journals and guided PhD students. He is a reviewer of several reputed international journals.

Abstract:

The efficient and cost effective electrocatalysts are of great interest for energy application due to the high cost and other associated problems of the existing ones. Here, in this work, the preparation of efficient electrocatalyst/substrate system by electroless deposition of non-noble metal nanoparticles, in particular the Ni/Multiwalled Carbon nanotubes(MWCNTs) has been prepared and tested for Methanol and Ethanol oxidation. The MWCNTs were synthesized by solvotehrmal procedure at a low temperature range of about 180–220°C in an autoclave system. The products were characterized by high-resolution transmission electron microscopy, powder X-ray diffraction, energy dispersive X-ray analysis and X-ray photoelectron spectroscopy. The Nickel nanoparticles with a size range of 5-10 nm were distributed almost uniformly on the surface of MWCNTs. The Ni/MWCNTs electrode has exhibited
remarkably higher current density of 145 mA/cm2 and a lower onset potential of -0.3 V in 0.1M CH3OH with 0.1 M H2SO4. The calculated average active surface area of MWCNTs and Ni/ MWCNTs’ electrode are 0.45 x 10-3 cm2 and 0.51 x 10-3 cm2 respectively and the surface coverage of Ni/MWCNTs’ electrode was 2.4409×10-7 mol/cm2. A significant electrocatalytic activity of Ni/MWCNTs for the oxidation of methanol and ethanol in acidic medium has been observed, which could be a positive result to be harnessed as a non-noble electrocatalyst/electrode system to improve the efficiency of the direct alcohol fuel cells.

Biography:

Heba ElSayed ElZorkany received her BSc in Biotechnology from Benha University in 2006. She joined the National Institution of Laser Enhanced Science, Cairo University as a Post-graduate student and she awarded a Diploma degree in Laser Applications in Biotechnology and Photobiology in 2008. She completed her MSc degree in 2013 (The photothermal effect of metallic nanoparticles on bacteria). She has enrolled in the PhD program at NILES, since 2014 to conduct her thesis titled “Efficiency of biocompatible quantum dot for cellular imaging using confocal laser scanning microscope”. She has been appointed as a Researcher at Nanotechnology and Advanced Materials Central Lab. (NAMCL), Agriculture Research Center (ARC) since 2010. Her research experiences include biotechnology, microbiology, photobiology, laser applications in biology, nanotechnology, spectroscopy, and microscopy. She is Confocal Laser Scanning Microscope (CLSM) & Cell Culture Specialist. She has participated in several international conferences.

Abstract:

Owing to its intrinsic photophysical properties quantum dots (QDs) act as a new tool for imaging and drug delivery. In this study, biocompatible silica-coated QDs were synthesized in order to track their cellular uptake in cancer cells. Firstly, Trioctylphosphine oxide capped CdSe QDs were synthesized by organometallic routes and ZnS shell were grown on them by injection solution of diethylzinc (Zn (Et)2) and hexamethyldislathiane ((TMS)2S) as Zn and S precursors. CdSe/ZnS QDs were then rendered water soluble by over-coating with silica using 3-Aminopropyltriethoxysilane (APTS) as silica precursor. The toxicological effects of silica-coated
CdSe/ZnS (Si-QDs) were investigated by exposing hep-G2 cells to different concentrations of Si-QDs then the mitochondrial activity was evaluated using WST-1 kit. The intracellular localization of Si-QDs in hep-G2 cells was investigated by Confocal Laser Scanning Microscopy (CLSM) equipped with CO2 incubator up to six hours. All stages of QDs formation were characterized by UV-Vis absorption, emission spectroscopy TEM, XRD, DLS and ζ-potential. Results showed that, high fluorescence QDs were synthesized with a size between 2 and 4 nm. Also, Silica coating process yielded final particle sizes of 6-18 nm which possessed strong luminescence
property. The cytotoxicity test results showed that Si-QDs were nontoxic even at higher concentrations as cells remained viable when exposed to Si-QDs at the highest concentration of 100 nM. The fluorescence imaging of hep-G2 cells exposed to Si-QDs by CLSM time lapse mode for 6 hours depicted the fast internalization of Si-QDs into the cells producing good fluorescence in the cytoplasmic portion. These results confirmed the effective role of these fluorescent materials in biological labeling and imaging applications.

Biography:

Francesca Costanzo has completed her PhD research at the University of Bologna, in 2000 with a thesis entitled: “Modified electrodes by conducting polymers”. Since her PhD, she combined her experimental experience with the theoretical work at different levels of approximation in the fields of solid state physics and condensed matter. Her competence in ab initio MD simulation allowed her to model, for example, the interaction of molecules on carbon materials (graphene, single and double walled nanotubes, fullerenes), and water splitting chemistry on transition metal oxide surfaces. She acquired her computational knowledge working at prestigious universities and institutions in Cambridge, Leiden, Padua and Barcelona. Her output includes 30 scientific articles, many invited talks and oral presentations.

Abstract:

Ionic liquids are one of the preferred options used by the industry for the storage of thermal energy in solar energy plants. Improving their thermophysical properties is an important goal to achieve more efficient heat storage and transportation media. A promising approach for improving these properties is to introduce nanoparticles dispersed in the ionic liquid or the molten salt, the so-called nanofluids. However, how thermophysical properties such as the heat capacity, self-diffusion, or heat conductivity depend on the microstructure of the nanofluids is still rather unknown. Molecular simulation, therefore, can play a major role in this research, as producing reliable experimental data for these systems is difficult and expensive. We have calculated by classical molecular dynamic simulations, thermal properties of disk-like graphene nanoflakes dispersed in organic solvent. In my contribution, I will discuss how the heat capacity and the thermal conductivity depend on the shape, the size and the density of the dispersed carbon nanoflakes. While thermal conductivity is well simulated by our classical model, the insertion of quantum corrections (QM) is necessary to calculate the heat capacity in good agreement with experiments. With our classical model including QM corrections, we are able
to shed light and gather basic understanding on the dependence of thermal transport properties on the nature of solute-solute and solute-solvent interaction.

Biography:

Romana Shahzadi is currently pursuing her PhD from University of Punjab, Lahore. She worked as Research Associate (2014-2016) at Centre for Environmental Protection Studies, Pakistan Council of Scientific and Industrial Research Labs, Lahore. She has completed her MPhil in Plant Genomics and Biotechnology from Agriculture University of Peshawar.

Abstract:

The metallic nanoparticles synthesis includes top-down and bottom-up method by means of chemical, physical and biological approach. The biosynthesis of silver nanoparticles is classified under bottom-up approach. Silver nanoparticles have the distinctive characteristics of anticancer, antimicrobial, catalytic and larvicidal activities. The Bacillus thuringiensis israelensis (Bti) have larvicidal activities against mosquitoes. So, the bacterial spore mixture is used for biosynthesis of silver nanoparticles. Nano particles were characterized using UV-Vis absorption spectroscopy for the confirmation of nano particles. XRD and SEM were used for the analysis of size and structure. The particle sizes were measured through SEM imaging ranging from 40 to 144.9 nm. The Bt-Ag NPs have mixed cubic and hexagonal structures. Interestingly, the mortality induced by Bt-AgNPs was comparatively high than that of the control against third instar larvae of A. aegypti (LC50 0.01 ppm and LC90 0.5 ppm) in all the tested concentrations, viz. 0.01, 0.05, 0.1, 0.5, and 1 ppm. Hence, the Bti-AgNPs nanoparticles would be significantly used as larvicidal against dengue vector mosquitoes Aedes aegypti.

Biography:

Peng-Sheng Wei received his PhD in Mechanical Engineering Department at University of California, Davis, in 1984. He has been a Professor in the Department of Mechanical and Electro-Mechanical Engineering of National Sun Yat-Sen University, Kaohsiung, Taiwan, since 1989. He has contributed to advancing the
understanding of and to the applications of electron and laser beam, plasma, and resistance welding through theoretical analyses coupled with verification experiments. Investigations also include studies of their thermal and fluid flow processes, and formations of the defects such as humping, rippling, spiking and porosity. He has published more than 80 journal papers, given keynote or invited speeches in international conferences more than 90 times. He is a Fellow of AWS (2007), and a Fellow of ASME (2000). He also received the Outstanding Research Achievement Awards from both National Science Council (2004), and NSYSU
(1991, 2001 and 2004), the Outstanding Scholar Research Project Winner Award from National Science Council (2008), the Adams Memorial Membership Award from AWS (2008), the Warren F Savage Memorial Award from AWS (2012), and the William Irrgang Memorial Award from AWS (2014). He has been the Xi- Wan Chair Professor of NSYSU since 2009, and Invited Distinguished Professor in the Beijing University of Technology, China, during 2015-2017.

Abstract:

Pore formation and its shape in solid influence not only microstructure of materials, but also contemporary issues of various sciences of biology, engineering, foods, geophysics and climate change, etc. In order to remove and control porosity, understanding its formation is important. A pore formed in solid is a consequence of a bubble nucleated by super-saturation and entrapped by a solidification front. This work accounts for realistic mass and momentum transport across a self-consistently and analytically determined shape of the bubble cap, whose surface is in physico-chemical equilibrium beyond the solidification front. Accurate determination of contact angle from a realistic shape of the cap is required to predict the relevant shape of the pore in solid. It was systematically found that there are two different solute transport models subject to thin and thick thicknesses of concentration boundary layers on the solidification front. Case 1 accounts for species transport from the pore across an emerged cap through a thin concentration boundary layer on the solidification front into surrounding liquid in the early stage, whereas Case 2 is subject to species transport from the surrounding liquid across a submerged cap within a thick concentration boundary layer into the pore. The results find increases in interfacial properties such as Henry’s law constant and Bond number decrease the pore radius. The predicted pore shape agrees with experimental data. A realistic prediction and control of the growth of the pore shape has therefore been obtained.

Biography:

Wilson Engelmann has obtained his PhD in Law/Unisinos (Brazil) and a Professor and Researcher of the Post-Graduate Program in Law, Master and Doctorate and Executive Coordinator of the Professional Master’s in Corporate Law and Business Law both at University of the Sinos Valley – Unisinos, Brazil. He is the Leader of JUSNANO Research Group and a scholarship holder of Research Productivity CNPq/Brazil. He is developing a research project, since 2008, on regulatory issues related to nanotechnologies and analysis of their social and ethical impacts.

Abstract:

Statement of the Problem: The use of nanoscale is currently growing: in research, industrial production and in the consumer market. There is no state legislative regulation on the matter. There is the rise of self-regulation, as well as the creation of norms by other social actors. The system of Law needs to enter in the context of innovation, granting legal effects to this regulatory production. The temporality of the new forms of regulation and the ability to deal with future risks and damages represent other challenges for the legal area.

Purpose of this study: It is based on the 79 documents of the OECD "Series on the Safety of Manufactured Nanomaterials", is to analyze the perception of risks and the way that the juridicization of the unknown future damages that might be generated from the manipulation of the nanoscale, especially in relation to human health and the preservation of the environment.

Methodology & Theoretical Orientation: the functionalist method will be used in a systemic-constructivist perspective, risk theory (Luhmann) and content analysis (Bardin). Comprehensive keywords were used to enable data collection in the 79 documents, which
are: "risk", "environmental safety" or "environment", "human health" and "manufactured nanomaterial".

Findings: The word "manufactured nano-material" has 4,934 repetitions; "Risk" has 4,214 repetitions; "Environment" has 2,204 repetitions and "human health" has 1,478 repetitions. This shows extreme concern about the risks which nanomaterials could pose to the environment and human health.

Conclusion & Significance: the observed keywords show that manufactured nano-materials may generate risks for the environment and human health, with little concern for the environmental safety, which has only 48 repetitions. For this reason it is important to
structure the framework as a legal risk management tool for nanotechnology companies to gather information and deal with future and uncertain damages. In this scenario is relevant an adequate evaluation of the ethical-social impacts in the structuring of selfregulation.