Biography: She is the founder and CEO for BioMedical and Technology Application Association, an honorable member of the Professional Technical Committee in ShangHai Executive Licensing Agents Association, a research member of Cosmetic Society of Chemists UK, other memberships including American Chemical Society, Licensing Executive Society China, Korean Commercial Cases Association, Intellectual Property Association of Japan and The Indian Society of Criminology. She was a visiting scholar in United States Court of Appeals for the Federal Circuit (CAFC), Max Planck Institute for Intellectual Property, Competition and Tax Law in Munich (MPI), Center of International Intellectual Property (CEIPI) in University of Strasbourg, N D Zelinsky Institute of Organic Chemistry in Russian Academy of Sciences. Before her full-time teaching at university, she worked for JC IP Group LLC as patent analyst, MSD as new product planning manager, Takeda Taiwan as department manager both in Medical Regulatory Department and Medical Affairs Department, and Microlife as Health Care Business Unit Director.
Abstract: Nano science on technologies have wide applications. True application on Graphene for industry has been widely explored by leading companies such as Samsung, LG, GE, Toshiba, Bosch, NEC and IBM which have invested enormously on this promising material.
The traditional applications for Graphene are mainly on solar panel, Lithium battery, supercapacitor, photovoltaic diode, transparent conducting, transistor, and image sensor, etc. However, there are more emerging applications, such as sea water treatment to be drinking water, medical applications.
In this paper, we will reveal the trend for Nano material and Graphene through patent profiles and how industry monetization these Nano Science and Technology with real applications. What the leading companies are directing nano-graphene for more products and services in this industry. Discuss the nano-graphene impact on electronic, automobile, medicine, environment and energy.
The safety issues aroused by Graphene industry will be reviewed. Pros and Cons of Graphene interacts with the current materials for versatile products and services to impact the current law, regulation and business models. We hope researchers, engineers and enterprises can all benefit from the information shared in this article and facilitate the nano-graphene technologies on the market.
Biography: Elham Mostafa Sadek El Akiaby is an emeritus professor at., petrochem. Div., Egyptian Petroleum Research Institute (EPRI). She was a demonstrator in 1977-80, Chem. Dept., Fac. Sci., Suez Canal Univ. She was a head of polymer lab. from 10/1/2007- 7/1/2013.She is a member of Egyptian society of polymer science and technology. She is a member in the permanent scientific promotion committee of applied chemistry. She is a supervisor on MSc. and DSc.theses She is a reviewer in many international journals. She participated in writing a chapter in a book entitled: “Micro and Nanostructured Epoxy/Rubber Blends.”She contributed in many conferences.
Abstract: Many potential applications have been proposed for carbon nanotubes (CNTs) including conductive and high-strength composites.
Effective utilization of carbon nanotubes in polymer based composites mainly depends on their dispersion and interfacial interaction. Unfortunately, because of their high aspect ratios, large specific surface area, and substantial van der Waals attractions, CNTs tend to self-aggregate into bundles spontaneously .In this work,our interest focuses on surfactant improved CNTs dispersion. For this, gemini surfactant and its monomeric form have been prepared in our previous work  and used as dispersants to achieve homogenous dispersion of multi-wall carbon nanotubes (MWCNTs) in poly(vinyl alcohol)(PVA) matrix. Surface charge of CNTs in aqueous suspension with and without surfactants was investigated by zeta potential measurements. The obtained nanocomposite PVA film samples were characterized by XRD, Raman spectroscopy and SEM. Mechanical, thermal, and electrical properties were discussed based on the CNTs content (0.0, 0.5, 1.0, 1.5, 2.0wt%)and surfactant type (0.01wt%).Based on the results obtained we can conclude that composite with CNTs (1.0 wt%) and gemini surfactants exhibit enhancing effect of mechanical features (i.e.tensile strength, elongation at break, modulus (at 50% and 100%) and Young’s modulus) compared with its monomeric structure. Thermal gravimetric analysis reveals that CNTs improve the thermal stability of the composites compared with neat PVA macromolecular chains. Also, the thermal stability of composite with monomeric surfactant is better than that upon using its gemini form.
The values of permittivity (),dielectric loss () and conductivity()rise with CNTs content up to 2 wt%. For PVA/CNTs/gemini surfactant composites, conductivity reaches 10-6Scm-1at 2wt% CNTs.This value is enough to achieve the electrostatic dissipation behavior .On the other hand, the PVA/CNTs/monomer surfactant composites, can form useful nanosized capacitor structure characterized by high permittivity and low dielectric loss.
Biography: Prof. Meera Ramrakhiani has been the Head, Department of Physics and Electronics and also Dean, Faculty of Science at Rani Durgavati University Jabalpur, India. She has 40 years experience of teaching and research. More than 25 students have completed their Ph.D. degree under her supervision in the field of nanomaterials, luminescence and photovoltaic solar cells. She has visited many countries for the research work and authored or co-authored about 400 research papers/book chapters/articles and successfully carried out research projects. She has received many awards and is life member of many professional bodies and Fellow of Luminescence Society of India.
Abstract: The optoelectronics devices made from ternary nano-compounds cover a broad spectrum and to tune various specific colours. The incorporation of semiconductor nanoparticle in polymer is expected to enhance the life and brightness. Presently photoluminescence (PL) and electroluminescence (EL) of Cd1-xZnxSe nanocrystals and Cd1-xZnxSe/polyvinyl alcohol nanocomposite have been investigated.
The Cd1-xZnxSe nanocrystals and Cd1-xZnxSe/PVA nanocomposites with different Zn content have been prepared and characterized by XRD and AFM. The photoluminescence and electroluminescence was studied by applying various voltages at diffeent frequencies.
Cd1-xZnxSe nanocrystals have cubic phase and nanocomposite films show hexagonal structure for x < 0.5, and cubic structure for higher values of x. The absorption spectra reveal that on increasing x, absorption edge shifts to lower wavelength. The photoluminescence shows shifting of PL emission peak towards shorter wavelength with increasing x. Electroluminescence studies show lower turn on voltage and higher brightness for samples with lower value of x. The EL spectra give a single broad peak due to nanoparticles only and shift towards blue on increasing value of x giving high intensity.
Embedding metal chalcogenide nanocrystals into polymer matrix improve the electroluminescence properties. The EL brightness increases very rapidly with voltage and thus quite high brightness can be obtained in nanocomposites. The color of EL can be tuned by varying the composition and/or by changing size in nano- regime, and intensity can be enhanced.
Abstract: Volatile organic compounds (VOCs), emitted by the human activity, represent a significant part of air pollutants and nowadays the catalytic total oxidation has been considered as most effective approach for their elimination [1, 2]. The progress in this aspect is in the preparation of nanostructured materials with tunable properties via the deposition of active nanosized particles on porous supports . Nanoscale metal/metal oxide materials reveal a great opportunity for various diverse applications in the fields of electronics, medicine and catalysis. In this aspect, the mesoporous metal oxides have been widely concerned as new potential carriers for catalysts due to their high specific surface area, pore volume and narrow pore size distribution. Recently, titania based composites have received much attention due to their superior optical, electronic, mechanical and catalytic properties, combined with non-toxicity and cost effectiveness. The aim of current investigation is to study the effect of copper modification of mesoporous ceria- titania binary oxides on their catalytic behaviour in ethyl acetate oxidation as a member of VOCs. For the first time a “chemisorption-hydrolysis” (CH) technique is applied for the copper loading and compared with the conventional incipient wetness impregnation (WI) procedure. The effect of binary oxides composition on the state of the hosted in them copper species is also in the focus of the investigation. The obtained materials were studied by N2 physisorption, XRD, UV-Vis, XPS, SEM, TEM, Raman and FTIR spectroscopies and TPR with H2. Ethyl acetate oxidation were performed in flow type apparatus followed GC analyses.
All synthesized ceria-titania supports exhibit high surface area and mesoporous volume.Among them, binary oxides represent improved texture characteristics, in the highest extent for 5Ce5Ti. XRD and Raman analyses show co-existence of anatase and ceria for 2Ce8Ti and well crystallized ceria for all other binary materials, which are also more finely dispersed as compared to the single TiO2 and CeO2. TPR data demonstrate higher reducibility of these species than the pure ceria ones. XPS and UV-Vis analyses show presence of Ce3+ and Ti3+ ions and lattice oxygen deficit. FTIR with pyridine demonstrates that the binary oxides possess mainly Lewis acidity, which changes in a complex way with their composition. All these results indicate incorporation of Ti in ceria lattice, which is confirmed by HRTEM. After the modification with copper, XRD, Raman and UV-Vis analyses reveal formation of CuO nanoparticles of 14-45 nm. More homogeneous and finely dispersed copper oxide species are registered for all CH modifications. XPS spectra demonstrate co-existence of Ce, Ti and Cu ions in different oxidative state. The amount of ions in lower oxidative state is higher for the binary supported copper modifications, in higher extent for the WI ones. All copper modifications exhibit higher catalytic activity in total oxidation of ethyl acetate to CO2 in comparison with the corresponding supports. The CH obtained materials are more active as compared to the WI ones. In accordance with the physicochemical study, this could be due to the stabilization of more finely dispersed CuO particles and formation of highly active Cu2+-Cu1+ redox pairs as well.
Small additives of copper to ceria and/or titania oxides promote their catalytic activity in total oxidation of ethyl acetate, but this effect is strongly influenced by support composition and procedure of copper deposition. The “chemisorption-hydrolysis” procedure provides formation of more homogeneously and finely dispersed copper species which also possess higher catalytic activity as compared to the conventional incipient wetness impregnation technique.
Biography: My name is Katerina Lazarova, PhD and I am assistant professor (postdoctoral fellow) in Institute of Optical Materials and Technologies (IOMT) “Academician Jordan Malinowski”, Bulgarian Academy of Sciences. My research is in the field of new optical materials, synthesis of metal oxides via sol-gel method, anti-reflective coatings and optical gas sensors and devices. Since the end of 2017, together with Technical University of Sofia, I am working on project „Synthesis of coal ash zeolites for adsorption, catalytic destruction and detection of atmospheric pollutants“.
Abstract: Coal ashes that are generated as a waste from Thermal Power Plants TPP “AES Galabovo”-Bulgaria supplied by lignite coal are used as a resource of valuable raw material for zeolite synthesis. The fly ash zeolites (FAZ) were obtained at alkaline activator (NaOH) to fly ash ratios of 0.5 and 0.6 using long-term alkaline atmospheric conversion. Using SEM and XRD both samples were characterized and identified as Na-X zeolite phase. N2 adsorption/desorption studies at cryogenic temperatures were used for determination of the specific surface and porosity of the samples. Post-synthesis wet ball milling was used for decreasing the particle size of the zeolites with minimal loss of crystallinity. Particle size distribution was studied as a function of ball milling parameters using Dynamic Light Scattering, while crystallinity was confirmed by XRD measurements.
Thin films of fly ash zeolites were deposited by the method of spin-coating. A sol-gel metal oxide or polymer films were utilized as templates in order stable zeolite films with good optical properties to be obtained. The surface morphology and structure of the films were studied by electron microscopy (SEM and TEM) and Selected Area Electron Diffraction, respectively, while the surface roughness was determined from 3D optical profiler measurements. Optical properties were studied by UV-VIS-NIR spectroscopy and spectral ellipsometry. Sensing ability of fly ash zeolites was tested by measuring reflectance spectra of the films prior to and after exposure to probe molecules (vapors of volatile organic compounds in our case). Further, the possibility of using the samples for detecting heavy metal ions in water is explored by ellipsometric measurements of metal ions (Cu(II), Cr(VI), Pb(II), etc.) in water. The application of zeolites from fly ash for optical sensing was demonstrated and discussed.
Biography: Hajo Dieringa has his expertise in developing magnesium alloys and magnesium based metal matrix composites. Having received his PhD (Dr. rer. nat.) from TU Hamburg-Harburg in 2006 he works since 2000 at the Institute of Materials Science at GKSS Research Centre, now Helmholtz-Zentrum Geesthacht. He is deputy head of the department "Magnesium Processing" and coordinated the work package "Metal Matrix Nanoconposites" in the large scale EU project Exomet. In addition to composites, he also developed creep-resistant magnesium alloys. He is Guest Editor of "Metals" Special Issue "Production and Properties of Light Metal Matrix Nanocomposites". He published 94 Scopus-listed papers, two books and seven book chapters and he holds five patents.
Abstract: Metal matrix nanocomposites with a magnesium matrix are a promising new material that can expand the application horizon of magnesium based materials. The optimization of mechanical properties, electrochemical properties and a conceivable functionalization of magnesium alloys by the introduction of ceramic particles, CNTs or nanodiamonds have become feasible in recent years. One reason for this is the drop in prices for these nanometer small reinforcing components. In this presentation, the various reinforcing components will be presented and examples from research will be used to show which improvements in the properties or functionalization of magnesium materials can be achieved using these components.
Biography: Jun Ni has completed his PhD from Institute of Solid State Physics, Chinese Academy of Science, and postdoctoral studies from Department of Physics, Tsinghua University. He was JSPS researcher in the University of Tokyo. He is now the professor in Department of Physics, Tsinghua University. He has published more than 150 papers in reviewed journals.
Abstract: As the nearest-row neighbor of carbon, boron have similar structural features and rich electronic properties when forming nanostructures. In this talk, we will show that boron and boron-carbon nanostructures exhibit rich variety of electronic properties. We show that BCS superconductivity in the stable 2D boron structures is ubiquitous with the critical temperature above the liquid hydrogen temperature for certain configurations. Our results support that 2D boron structure may be a pure single-element material with the highest Tc on conditions without high pressure and external strain. We find that tensile and compressive strains have significant but different effects on the buckled borophenes. Our results reveal that the lower-frequency acoustic branch affected by the strain plays an important role for the variation of the superconductivity. Our results show that the adsorption energy of alkaline and alkaline earth atoms on BC3 sheet is larger than the cohesive energy of the metal atoms themselves. We show that, under a suitable external electric field, a considerable magnetism can be induced, accompanying with the emergence of both magnetism the electric dipole moment of the systems with strong coupling of them. The thallium (Tl) decorated BC3 and the transition metal atoms adsorbed BC3 can host robust quantum spin Hall state and quantum anomalous Hall state, respectively, which indicates that the systems of graphenelike BC3 with adatoms are good platforms for the study of quantum spin Hall and quantum anomalous Hall effects.
Biography: 1990 – 1996: Study of chemistry; University of Karlsruhe (TH).
12/1996: Diploma thesis in organic chemistry with Prof. Dr. H.-J. Knölker
05/2000: Doctoral thesis in inorganic chemistry with Prof. Dr. H. Schnöckel
2000 – 2002: Postdoc at the institute of inorganic chemistry, University of
Karlsruhe (Research stays at the research facilities in Hamburg (DESY
Deutsches Elektronen Synchrotron) and Villingen (PSI: Paul Scherrer
2002 – 2006: Habilitation at the Institute of inorganic chemistry at the
University of Karlsruhe.
2006 – 2010: Privatdozent at the University of Karlsruhe
2010 – 2012: W2-Professor (Inorganic Chemistry) University Duisburg-
2013 – now: W3-Professor (Functional Nanostructured Materials) University
Abstract: An important prerequisite for an understanding of size dependent properties of
clusters or nanoparticles; e.g. the transition molecule → semi-metal → metal, is the
knowledge of the structure. This finding seems trivial however, for metals or semimetals
only few compounds are structurally known in the area between the molecular
and solid state. Metalloid clusters of the general formulae MnRm with n > m (M =
metal;R = ligand) are ideal model compounds for this nanoscaled area, opening our
eyes to the complexity and the fundamental principles of the dissolution and the
formation of metals. Thereby in the nanoscaled regime novel physical and
chemical properties emerge. The most fruitful synthetic approach to metalloid
germanium clusters applies the disproprotionation reaction of Ge(I) halides ,
leading to metalloid clusters like Ge12[FeCp(CO)2]8[FeCpCO]2 1 or
[Li(THF)2)]Ge14[Si(SiMe3)3]5 2 . Despite this metalloid gold clusters are obtained via
the reduction of a gold precursor like HAuCl4 with e.g. NaBH4 in the presence of a
thiol ligand leading to metalloid clusters like Au102(p-MBA)44 3 (p-MBA = pmercaptobenzoic
acid). Here we discuss the synthesis, structural features and
bonding properties of recent results in germanium and gold chemistry and their
relation to the corresponding element and other metalloid clusters.
Biography: Diaz-Puerto Zarick Juliana is currently a Master's student in environmental engineering at the Universidad Nacional Autónoma de México (UNAM) in Mexico's City, México. Through different researches, she found her passion in the decontamination of water resources by different mechanisms; she is currently developing his research dissertation on disinfecting pathogens present in potable water, waste water and food, using different nanoparticles activated by light. She has carried out research on different topics at the Engineering Institute of UNAM
Abstract: Nanomaterials offer great potential in the adsorption and degradation of multiple environmental pollutants due to their catalytic and photocatalytic activities. Moreover, some of these materials have shown interesting behavior towards microorganisms including bacteria and protozoa. Specifically, iron oxides such as ZnFe2O4 and Fe3O4 Nanoparticles (NPs) have demonstrated sustained antibacterial action against a broad spectra of bacteria such as Staphylococcus aureus and Escherichia Coli, which have been the focus of attention in modern biology due to its ubiquitous presence in human environment and ability to adapt and overcome antibiotic treatments.
Typical semiconductors, for example ZnO and TiO2 are usually utilized in sun protection formulas as antimicrobial and/or antifungal agents as well as UV light scavengers. Several types of bacterial pathogens (Salmonella enterica, Staphylococcus aureus, Pseudomonas aeruginosa, etc), protozoa (Giardia lambia, Trypanosoma brucei), and fungi (Candida albicans, Aspergillus fumigatus) pose a threat to human health through its presence in health facilities and food industry; thus, it is important to investigate an effective way to inhibit the growth of these pathogens species from the environment. Metal oxides have been suggested as potent antimicrobial agents; in particular, ZnO NPs are considered the most effective antibacterial agent among metal oxides NPs (Al2O3, SiO2 and TiO2) against pathogens such as Bacillus subtilis, Escherichia coli and Pseudomonas fluorescents. It has also been stated that ZnFe2O4 have had an excellent removal efficiency of colony forming units (CFU) especially in pathogen microorganisms that represent a threat to human health.
In the present work, we intend to quantify antibacterial properties of different ferrites towards prokaryotic organisms. The utilized nanoparticles of ZnFe2O4 and Fe3O4 have been obtained by a one-step hydrothermal method, characterized for low temperature and high pressures systems without annealing being required. The ZnFe2O4 and Fe3O4; NPs were characterized by X-Ray diffraction (XRD), and Transmission Electron Microscopy (TEM). Secondly, nanoparticles were studied for their bactericidal effect through MIC determination while its bacteriostatic effect were established by disc diffusion test and growth kinetics. The selected bacteria were two gram positive (Staphylococcus aureus, Bacillus cereus,) and two Gram negative (Escherichia coli, and Salmonella typhi) strains in order to understand mechanisms that trigger toxicity. Minimal inhibitory concentration (MIC) results show that growth control is more effective for Gram-positive bacteria than for Gram-negative bacteria, and it is also evident that the smaller the particle size the greater antimicrobial effect and a higher concentration of ZnFe2O4 NPs, higher cell death of bacterial pathogens.
Abstract: In the present study, the interaction of electron irradiation with multi-wall carbon nanotubes (MWCNTs) were investigated. The pelletized samples were subjected to different energies (6 MeV; 9 MeV; 12 MeV; 15 MeV) electron irradiation in one dose (1000 mGy). Virgin and irradiated samples were investigated different techniques including Raman spectroscopy, x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) to elucidate the optical, structural, morphological and chemical changes of the samples under irradiation. According to the Raman results structural improvement has occurred in the irradiation with electrons in other energies except 6 MeV energetic electrons. Especially, in the case of irradiation with 15 MeV energized electrons, the recovery rate was the highest with 8.5% compared to the non-irradiated sample. Structural distortions manifest themselves as bending, penetration, fractures and black spots in the TEM and SEM figures. It has been determined that MWCNTs exhibit distinct behavior at each energy value. Therefore, it is important to know the behavior of the MWCNTs in untested energies due to the devices made from MWCNTs have been used in the environment containing radiation. The stability of the devices in these environment is the vital parameter for healthy working.
Nanocomposites and Multifunctional Materials
Biography: PhD research student on high-throughput screening methodologies in the discovery of new materials and composite structures for resistive memory applications. Mabkhoot is experienced in Developing novel thin film for resistive switching memory using Physical Vapour Deposition (PVD) methods (Electron Beam Evaporation). He is interested in thin film characterisation using (XRD, SEM, EDS). He worked on advanced conductive atomic force microscopy (C-AFM).
Abstract: Understanding the effect of material composition, structure and morphology in composite ReRAM devices is essential for a more complete mechanistic insight, and the optimisation of devices for next generation memory and logic applications. The combinatorial synthesis of thin film materials using evaporative techniques provides an ideal tool for the control of composition, structure and morphology of complex materials such as oxides . This allows the systematic high throughput screening of the intrinsic properties of the materials, as well as the high throughput optimisation of composite thin films that mimic memory device structures.
Titanium dioxide thin films with thickness variation (10 nm – 50 nm) are deposited on platinized substrates by co-operative techniques. An amorphous and crystalline titania were successfully prepared using physical vapour deposition and characterised by XRD, XPS and AFM. Cu were used as top electrode. Current-Voltage (I-V) measurements were implemented employing a current compliance (IC) of 1 mA and rate of 50 mV/s. All devices were formed and exhibited bi-polar switching characteristics. The localized filaments can be switched repetitively with a resistance ratio of 30. Our findings underline that Cu diffusion and the formation of filaments are the major mechanism for the resistive switching in Cu/TiO2/Pt cells.
Abstract: In this work, we investigate the behaviour of Cobalt Nanoparticles (CoNPs) deposited on exfoliated graphene on SiO2. The graphene layers were obtained via mechanical exfoliation of natural graphite and the CoNPs are deposited via gas aggregation method using a magnetron sputtering. Graphene and Cobalt Nanoparticles (CoNPs) present unique properties and the incorporate of magnetics nanoparticles in the graphene have been shown effect magnetroelectric due of exchange coupling between cobalt cluster placed on a graphene sheet . The graphene samples were mapped using an optical microscope and were characterized via Atomic Force Microscopy and Raman Spectroscopy before and after the nanoparticle deposition. After the nanoparticle incorporation, Magneto-Raman measurements were made to several temperatures on few layers and multilayers of graphene with CoNPs. The resulting spectra showed a curious behavior: a peak to the left of the G band appeared, and started to increase in intensity alongside the magnetic field strength, up to a certain level, at which the peak suddenly disappeared. In this way, we systematically study graphene under different applied magnetic field and temperature, on few layers and multilayers.
Biography: Prof. Al-Rawashdeh received his Bachelor degree in 1986 and Master degree in 1989 from Yarmouk University-Jordan, and Ph.D. degree from Georgetown University, Washington DC, USA, in 1997. He has been a Faculty member at JUST since 1997 and on leave from 2017-Present at HCT-UAE. He has received an award of the Ministry of Higher Education of Jordan for the Distinguished Research Paper of 2009, Fulbright scholarship-USA, DFG and DAAD. He has published over 50 refereed journal and conference papers, two book chapters, presented his work in over 30 international conferences. His current research interests are in the areas Material Sciences.
Abstract: Nanocomposite materials based on metal nanoparticles and graphene oxide (GO) are attracted considerable research interest because of their potential applications, including surface-enhanced Raman scattering, catalysis, sensors, biomedicine and antimicrobials. In this study, several GO/ZnO nanocomposites were synthesized via changing the GO’s ratio with respect to the ZnO nanoparticles (6.25, 3.125, 1.25, 0.625 and 0.125%) and used as a photocatalysts for degradation of organic pollutants present in water. The degradation of methylene blue (MB) was investigated as model of pollutant. An optimum catalytic activity of 84% was achieved by using a nanocomposite with a percentage of 3.125% GO, exposed to irradiation of sunlight for 90 min. Furthermore, a nanocupper, nanopalladium and nanosilver particles were used as dopants to study their effects on activity of the photocatalyst. The GO/ZnO/Cu and GO/ZnO/Pd composites showed that the activity toward MB degradation was decreased to about 50% and 70% respectively, while a significant increase in the activity of MB degradation by GO/ZnO/Ag nanocomposite was achieved, which reached 100% of MB degradation after only 30 min exposure to light irradiation.
Biography: Ajay Kumar received the B.Tech. degree in Electronics and Communication from UPTU, Lucknow, India in 2009 and M.Tech. degree in Nanoscience and Technology from Delhi Technological University, Delhi, India in 2014. He is currently Assistant Professor in Electronics and Communication Engineering Department in Jaypee Institute of Information Technology (JIIT), Noida and pursuing his Ph.D. degree in Electrical Engineering Department, Delhi Technological University (Formerly Delhi College of Engineering), New Delhi, India.
Abstract: With the aid of nanotechnology, various kinds of biosensors has been developed for medical applications and disease diagnostics, to address its high performance. In this paper, ultra-low power, high sensitive nano-gap embedded Carbon Nanotube Recessed Channel (CNT-RC) MOSFET for the detection of neutral biomolecules at sub-20nm gate length has been investigated. For the immobilization of biomolecules, 8nm cavity gap is created and electrically detected of biomolecules in terms of switching ratio, a shift in threshold voltage and sensitivity. There are different biomolecules (Streptavidin, Biotin, APTES and Protein) have been considered and found that sensitivity of the proposed device enhances with the increase of dielectric constant of the respective biomolecule present in the nano-cavity gap. The whole investigation has been done at a very low drain bias (0.2V) at which the device gives high sensitivity using a powerful simulation tool ATLAS. CNT is used as a channel material onto RC MOSFET, which enhances significantly the gate controllability owing to very low resistivity with high mobility. In this proposed biosensor, the channel potential of the device is influenced by the electrical properties of biomolecules.
Biography: Author’s biography: Dr. Sanjit Sarkar has done his bachelor and master degree from University of Calcutta. After completing Ph.D. degree from Indian Association for the Cultivation of Science, he is currently working as an Assistant Professor in Dept. of Physics, Surendranath Evening College, Kolkata, India. He has published 15 papers in reputed international peer reviewed journals. His present research interests are self powered heterostructures based broad band photodetector and solar light assisted magnetically separable heterostructure photocatalyst for organic dye degradation.
Abstract: Photodetectors with response in the UV or UV and visible region are used in a wide range of applications from everyday consumer electronics (compact disc players, smoke detectors, remote control) to more sophisticated applications such as missile guiding, environmental monitoring, space research and optical communications. ZnO and ZnS both are wide band gap, non toxic, earth abundant materials and very stable under hostile environment. ZnO/ZnS heterostructures are reported to be good candidate for UV detectors, therefore our aim was to extend the detection range of this heterostructure from UV to visible region by means of interface engineering. Ionic exchange process was adopted to grow the interface and the interface was modified further by annealing process. More than two orders higher responsivity and ‘ON/OFF’ ratio has been observed in case of heterostructure sample as compared to pristine ZnO. The structural and morphological investigations confirm the formation of ZnS and ZnO. The emission and absorption spectra indicate that the visible absorption is not due to the formation of ZnS over ZnO i.e. not due to the type II transition. The emission and absorption spectra of annealed samples shows that the visible absorption arises due to annealing of heterostructure sample i.e. formation of ZnO1-xSx at the interface. The XPS spectra confirms the presence of ZnO1-xSx at the interface. Finally it has been established that the interfacial surface engineering can be useful to improve the visible response and a significant photovoltaic performance under visible light illumination can be achieved. Unlike the other recent reports on self-powered UV-visible photodetector, we have achieved two order higher visible response without compromising the UV photoresponse. Unprecedented broad wavelength photodetection in self-powered mode in the present study highlights the uniqueness and advantage of an interface in a core-shell heterostructure for photodetection applications.
Nanomedicine and Biomedical Engineering
Biography: Bin Chen earned his Ph.D. degree at Xi’an Jiaotong University, China in 2002. He is currently a full professor and vice director at State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University. Dr. Chen has devoted his efforts to the research of photon propagation, heat transfer model, cryogen spray cooling and biomedical application of nanomaterials related to Laser dermatology. Now he served as editorial board member of “Journal of Clinical Dermatology and Therapy”.
Abstract: Port wine stains (PWSs) are congenital vascular malformations caused by the expansion of dermal capillaries. The most effective strategy for treating PWSs is laser therapy based on the principle of selective photothermolysis. During the laser irradiation, the chromophore (hemoglobin in blood) will convert laser energy into heat and then damage the vascular lesions. A pulsed dye laser is considered the gold standard treatment modality for PWSs. However, the strong absorption of epidermal melanin reduces the blood absorption to light, thereby limiting the laser treatment efficacy. As such, the majority of lesions are incompletely removed. Owing to their unique optical properties, GNPs with the size between 1 and 100 nm can absorb and convert laser energy into heat, yielding potential application in laser treatment of PWSs.
In this work, the discrete dipole approximation (DDA) approach was employed to calculate the optical properties of GNPs. The extinction efficiency, Qext=Cext/πD2, is used to describe the optical absorbance property, where D is the diameter of the nanoparticles and extinction cross section Cext is calculated from DDA. In the DDA calculations, the lattice spacing d is fixed as 0.5 nm. With this lattice spacing, the accuracy of DDA is guaranteed by |m|2πd/λ<0.5, where m is the complex refractive index of the gold and λ is the wavelength in vacuo.
GNPs have one extinction peak in visible range which depends on the diameter of GNPs. When the diameter increases from 5 nm to 40 nm, the extinction peak slightly increases from 521 nm to 528 nm, and the extinction absorbance also increases. With the increase of diameter, the scattering intensity of GNPs increases greater than absorption intensity, indicating that GNPs with greater diameter has lower photothermal conversion. Therefore, GNPs with size between 20 and 25 nm combined with laser light at 532 nm can be used to improve the efficacy in laser treatment of PWSs.
Biography: Olga E. Glukhova, Doctor of science in physics and mathematics, now is a head of Department of Radiotechnique and electrodynamics at Saratov State University and leads the Division of Mathematical modeling in Educational and scientific institution of nanostructures and biosystems at Saratov State University. She received her DSc degree in solid state electronics and nanoelectronics from Saratov State University in 2009. Her main fields of investigation are: nanoelectronics, molecular modeling of biomaterials and nanostructures, molecular electronics, mechanics of nanostructures, quantum chemistry and molecular dynamics, carbon nanostructures (fullerenes, nanotubes, graphene, graphane). She has published about 170 peer-reviewed journal papers and four monographs.
Abstract: Currently, the rapidly developing field of medical materials science is cell and tissue engineering, focused on the development of bioartificial systems to restore the three-dimensional structure of tissue at the site of injury . The key role in the reconstruction of damaged tissue is played by so-called matrices - wireframe smart materials designed to support the growth and proliferation of cells . For successful use in tissue and cell engineering, matrices should have a controlled structure, be non-toxic, and also be characterized by high strength, electrical conductivity and thermal conductivity. In this regard, the actual problem of modern bioengineering is a search for materials to create the matrices.
For this, we investigate in silico the electroconductive layered natural polymer matrices, the framework of which is formed by a branched single-walled carbon nanotubes (SWCNT) network with T-junctions between tubes, and the filler is albumin, collagen, and chitosan.
Investigation of the electrical conductivity of the framework formed by T-junctions of SWNTs (12,12) with a diameter of 1.5 nm has been carried out by the Keldysh nonequilibrium Green function technique and DFTB method. A numerical evaluation of the contact resistance and electrical conductivity of seamless and suture T-junctions of SWCNTs is given. The effect of the type of structural defects in the contact area of the tubes on the contact resistance of the T-junction of SWCNTs was revealed. A coarse-grained model of a branched SWCNT network with different structure densities is constructed and its electrical conductivity is calculated. A new layered bioconstruction is proposed, the layers of which are formed by natural polymer matrixes: CNT-collagen, CNT-albumin and CNT-chitosan. The energy stability of the layered natural polymer matrix has been analyzed, and the adhesion of various layers to each other has been calculated. Based on the obtained results, a new approach has been developed in the formation of 3D electrically conductive bioengineering structures for the restoration of cell activity.
Nanotechnology for Energy and the Environment
Biography: Dr. Syeda Sitwat Batool, is an Assistant Professor at COMSATS
University Islamabad, Islamabad Pakistan at Physics department. She
received her PhD Degree from PIEAS Pakistan. Dr. Batool has over 19
Publications. She has expertise in gas sensors, Photocatalytic activity,
adsorption and electron transport properties of nanomaterials. At
COMSATS she is working on Photocatalysis water splitting and
degradation of toxic compounds for environmental remediation.
Abstract: TiO2 nanofibers were synthesized using electrospinning [Jamil et al Ceramics International 38
(2012) 2437–2441]. The nanofibers were polycrystalline and porous in nature having average
diameter and length of ~150 nm and 200 μm, respectively. Fig. 1 (a) and (b) shows scanning
electron microscope (SEM) and transmission electron microscope (TEM) image of TiO2
nanofibers, respectively. The bandgap of the nanofibers lies in optical range ˃ 3.2eV. Which
showed relatively low photocatalytic degradation of toxic textile dyes (Fig. 2). To improve it
photocatalytic activity we embedded Mn0.5Co0.5Fe2O4 nanoparticles into TiO2 nanofibers. Which
showed improved photocatalytic activity for the degradation of toxic organic compound (Fig. 2).
We are now investigating the effect of photocatalytic water splitting for hydrogen evolution. It is
expected that these heterostructure nanofibers will show improve photocatalytic activity for
hydrogen evolution via water splitting.
Abstract: The dye-sensitized solar cell (DSSCs) is conversion of visible light wavelengths sensitization into electric energy. The performance of the DSSCs mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the photoelectrode of titanium dioxide formation are important parameters determining the efficiency of DSSCs. It is well known that gases and liquids can become supercritical fluids when they are compressed and heated above their critical pressure and temperature. Compared with liquids, the density and viscosity of supercritical fluids are lower, but diffusion in these materials is greater.
Hence, supercritical fluids are widely used in chemical extraction, reactions, polymerization, chromatography, and impregnation of desired additives into various materials. In this study we investigated the modified titanium dioxide formation on dye-sensitized solar cells by supercritical carbon dioxide fluid synchronous dyeing. The photo-electrode was made with compact layer and scattering layer. Supercritical carbon dioxide fluid extracted natural dyestuff and synchronous dyed photoelectric. It has the best photoelectric conversion efficiency of dyeing parameters 3000 psi, 50 ºC, 30 minutes. Experimental results showed that both the compact layer and scattering layer could improve conversion efficiency. The photoelectric with P25/R-type/PEG scattering layer is more conversion efficiency than single compact layer about 20％~30％. Also we described the photoelectric model of P25 / R-type / PEG scattering layer on DSSCs as be shown in the paper
Abstract: Nanotechnology application in the industries related to oil and gas can be categorized into different fields as: sensing or imaging, enhanced oil recovery, gas mobility control, drilling and completion, produced fluid treatment, and tight reservoir application. In this direction, most of studies focused on the propagation, delivery, and recovery of nanoparticles in oil and gas industries. Assessment of impact of nanotechnology on health, safety and environment (HSE) regarding its application in oil industry is a subject area that needs much more studies to be conducted. In this survey, the state of the art researches will be examined regarding recent outcomes and propositions on environmental impacts in the usage of nanotechnology in oil and gas industry.
Biography: Dr. Adel A. Ismail is a Research Scientist at Kuwait Institute for Scientific Research, KISR. He received his Ph.D. degree in Chemistry from Ain Shams University in 2001, Cairo, Egypt. Ismail carried out postdoctoral research at University of Florida (2003), National Institute of Advanced Industrial Science & Technology, Japan (2005-2007), University Hannover (2008-2010). His research interests include design porous photocatalysts, hydrogen production, chemical sensor, and self-cleaning. He has published more than 130 international scientific papers and his publications have been cited more than 4500 times with h-Index: 40. He has participated in 20 industrial projects in nanotechnology and photocatalysis applications
Abstract: Mesoporous TiO2 films deposited on diverse glass substrates such as soda-lime glass (SL), conductive F-doped Tin Oxide (FTO) and Indium Tin Oxide ITO glass substrates employing dip-coating. The prepared films were calcined at 400 °C for 4 hours and subsequent the mesoporous TiO2 films deposited on diverse glass substrates were assessed for their photodegradation for CH3CHO oxidation in gas phase as a probe molecule and compared with either nonporous TiO2 film or commercial Pilkington Glass ActivTM. The surface areas of mesoporous TiO2 films deposited on SL, FTO and ITO are 215, 352 and 295 m2/cm3, respectively. The thickness of the TiO2 films was determined to be around 228±10, 184 ±15 and 205 ±15 nm deposition on SL, FTO and ITO substrates, respectively. The findings exhibited that the mesoporous TiO2 films deposited on SL, FTO and ITO substrates are more photonic efficiency than nonporous TiO2 films and Pilkington Glass. The photonic efficiency of mesoporous TiO2 film deposited on different glass substrates is the following order FTO> ITO > SL. The photonic efficiency of mesoporous TiO2/FTO substrate is higher 3 and 21 times respectively. In addition, the outstanding photocatalytic activity of mesoporous TiO2/FTO substrate is shown in recycling tests in which no significant reduce in the photonic efficiency was recognized after five repetitive times for 24 hours continuously, indicating a promising materials for potential applications.
Abstract: Nanoparticles of MgAl2O4 are renowned for their dielectric, optical and photocatalytic activities.
Magnesium aluminates were successfully synthesized using simple, easy, environmental friendly and
cost effective sol gel method. Composites of MgAl2O4with graphene nanoplatelets were prepared by
the ultra sonication approach in which ortho-xylene was used as a dispersive medium. The
composition of graphene nanoplatelets was varied as 1%, 2%, 3%,4% and 5%. The fabricated samples
were characterized through versatile techniques such as XRD, SEM, FTIR, Dielectric analyser and
UV-visible spectroscopy. XRD results verified the phase formation of MgAl2O4 nanoparticles. With
increased concentration of graphene nanoplatelets a prominent peak appeared at 26.5° which
represents the graphitic plane (002). Crystallite size approximated by the aid of Debye’s Scherer
formula was 13 ± 2 nm. SEM images depicted the complete anchoring of MgAl2O4 nanoparticles over
the graphene nanoplatelets. The particles size attained through SEM was 17 – 28 ± 2 nm. FTIR further
verified the chemical composition of composite samples. Bands at 695 cm-1, 526 cm-1, 1420 cm-1and
1459 cm-1 corresponds to MgO4, AlO6, C-O and C=C groups. Giga hertz dielectric properties were
extracted for entire samples, considerable enhancement was noticed in all such properties with
addition of graphene nanoplatelets. Dielectric constant value for pristine MgAl2O4 nanoparticles was
6.1 which increased to 478 for 5% graphene nanoplatelets based composite, dielectric loss which was
initially 78.59 inflated to 210.22 for 5% graphene based composite, tangent loss also rose to 4.936
which was 0.106 for MgAl2O4 graphene nanoplatelets, AC conductivity was also enhanced from
0.000108 Sm-1 to 0.5014 Sm-1 for 5% graphene composite. In order to compute the band gap of
samples uv visible spectroscopy was used. Band gap calculated for pure MgAl2O4 nanoparticles was
5.3 eV which reduced to 5.24 eV, 5.16 eV, 5.05 eV and 4.29 eV for 1%, 2%, 3%, 4% and 5% loaded
graphene composites. Moreover, photocatalytic degradation performance was studied through UV
visible spectrogram. The results show that degradation efficiency increased from 75 % for pristine
MgAl2O4 to 89 % when graphene was added to it in form of composite indicating that such
composites are potential candidates for industrial waste water treatment.
Biography: YX Huang graduated from Department of Physics, South China Normal University and obtained Doctor of Sciences in 1986, worked as a Postdoctoral fellow in the Department of Physics, Massachusetts Institute of Technology from 1986-1989. Now he is a Professor of Medical Physics in the Department of Biomedical Engineering, Ji Nan University. He has been the Member of Academic Degree Committee of the State Council of China; the Vice President of Chinese Society of Medical Physics; the Member of Science Committee of International Organization of Medical Physics; the Honorary Presidents of GuangDong Society of Biophysics and GuangDong Society of Biomedical Engineering.
Abstract: We report a novel technique of laser chromosome welding which uses violet pulse laser micro-beam for the welding of chromosome and genetic materials. The technique can integrate any size of desired chromosome fragment into recipient chromosomes by combining with other techniques of laser chromosome manipulation such as chromosome cutting, moving, and stretching. We demonstrated that our method could perform chromosomal modifications with high precision, speed and ease of use while without the requirements of restriction enzymes, DNA ligases and DNA polymerases. Unlike the conventional methods such as de novo artificial chromosome, our method has no limitation on the size of the inserted chromosome fragment. The inserted DNA and its size can be exactly defined and the processed chromosome can retain their intrinsic structure and integrity. With the technology, one can repair/replace defected chromosome or even create a recombinant or artificial chromosome containing all the elements required for successful maintenance in vivo, including telomere, centromere and all the other cis-acting elements with an easier way to a fine degree of control. Therefore, our technique provides a high quality alternate approach to directed genetic recombination, and can be used for chromosomal repair, removal of defects and artificial chromosome creation. The technique may also have applicability on the manipulation of large pieces of synthetic DNA.