31^st Nano Congress for Future Advancements August 29-30, 2019 London, UK

Biography:

I am researcher from 2000. I have completed PhD in 2008 from Nara Women’s University and continued postdoctoral studies with Osaka University and Nara educational University. I have published more than 25 papers in reputed journals. I have a interest in iridium complexes and Ruthenium complexes. Recently I am also interested in metal free emission product.

Abstract:

Triprotonated and diprotonated compounds [(L)H₃]³⁺ and [(L)H₂]²⁺ were prepared by the reaction of (L = terpy, tterpy and Clterpy) with a variety of acid (HF, HCl, HBr, H₂SO₄, and H₃PO₄) in water.  Protonated pyridine rings are hydrogen bonded intramolecularly to the adjacent anion and intermolecularly to the adjacent PF₆^- in compounds.  These hydrogen bonds restrain the nonradiative decay to produce intense emission.  Density functional theory was applied to interpret the planarity in compounds.  The attachment of two protons to the nitrogen in [(terpyH₂)H₂O]²⁺ and[(tterpyH₂)H₂O]²⁺  lead to the strong emission in acetonitrile (F = 0.29 and 0.30, respectively).  The attachment of two protons to the peripheral nitrogens in [(terpyH₂)H₂O]²⁺and intermolecularly hydrogen bonded to the two adjacent F atoms in PF₆^-, which results in exhibiting a strong emission with a large quantum yield.

Biography:

Jianqi Zhang has completed his PhD at the age of 36 years from University of Central Florida and continued postdoctoral studies from Massachusetts Institute of Technology. He is the Professor and Director of Foreign Affairs at Inner Mongolia University of Science and Technology, China. He has published about 80 papers in reputed journals/conferences and 4 books. 

Abstract:

Al₈₈Ce₆TM₆ (TM = Ti, Cr, Mn, Fe, Co, Ni and Cu) amorphous alloys were manufactured by melt-spun technique. The evolution of crystallization, microstructure, mechanical and electrochemical properties of the alloys was investigated by DSC, XRD, TEM, micro-indentation and electrochemical techniques. The compositional dependence of the transition metals (TM) on glass-forming ability and thermal stability was studied in terms of various criteria. The result indicates that the each of the transition metals Ti, Cr, Mn, Fe, Co, Ni and Cu, microalloyed with both Al and Ce spurs the mixture to form uniformly either a completely amorphous phase or a partially amorphous phase in which short range ordered (SRO) quasi-crystalline clusters or/and face-centered-cubic aluminum (FCC-Al) nanoparticles are embedded. Such meta-stably phased microstructures confer the Al₈₈Ce₆TM₆ alloys mechanical hardness 700-950 MPa and corrosion resistance 10^-7-10^-8 A/cm², much higher than the conventional Al crystalline alloys such as AA 2024, AA 6061 and AA 7075 which normally present hardness 500-600 MPa and corrosion resistance 10^-6 A/cm². The results demonstrate Al₈₈Ce₆TM₆ (TM = Ti, Cr, Mn, Fe, Co, Ni and Cu) amorphous alloys have potential applications for aerospace and national defence.

Biography:

Sadrzadeh researches the fundamental and applied aspects of membrane materials and process development, focusing on their applications in industrial/residential wastewater treatment. He has an h-index of 27 (according to Scopus) with his refereed publications cited more than 1900 times. He is currently directing Advanced Water Research Lab (AWRL) at the University of Alberta that is equipped with the membrane and nanoparticle synthesis and characterization equipment as well as membrane filtration systems. There are 15 graduate students and 4 postdoctoral fellows are working under his supervision on cutting-edge membrane technologies.

Abstract:

Membrane separation processes have become one of the fastest emerging technologies for desalination and water treatment due to their distinct advantages over traditional processes. In particular, membrane separation processes have lower operating costs, compact design and high product quality. However, the low thermomechanical strength of polymeric membranes and their vulnerability to fouling has limited the development of sustainable and energy-efficient membrane processes for many water treatment applications. Given that, much research works are currently underway on the development of high-performance membranes to tackle these challenges. The development of nanocomposite membranes combines the low fabrication cost of polymeric membranes with the high thermomechanical properties of ceramic membranes.

The general idea for the synthesis of nanocomposite membranes is to induce the thermal, electrical, hydrophilic, anti-bacterial and molecular sieve properties of nanomaterials to the base membrane.  We used TiO₂ nanoparticles (NPs) to effectively generate highly oxidizing hydroxyl radicals which readily attack and decompose organic contaminants in water. Electrically conductive membranes were fabricated membranes by using ITO and ATO NPs whose surface could be tuned by applying an external electrical field to prevent adsorption of foulants based on electrostatic repulsion. Graphene oxide (GO) nanosheets offered us an exciting opportunity to integrate the antibacterial, electrical properties and mechanical strength of these NPs. We also developed strategies to overcome the major challeng for the fabrication of nanocomposite membranes, i.e., the severe aggregation of the NPs and their weak compatibility with polymers. These two phenomena lead to formation of non-selective voids at the interface of the polymer and NPs, which significantly reduces the rejection percentage.

Biography:

Qian-Dong Zhuang is a Reader in the Physics Department at Lancaster University UK. He is the group leader of MBE Research Laboratory. His current research is focused on novelsemicodnuctor quantum materials and quantum devices. He has published 2 book chapters and more than 90 papers in peer-reviewed scientific journals. He is an Editorial Member of Nature Scientific Reports and IoP Journel of Semiconductors.

Abstract:

The control of optical and transport properties of semiconductor heterostructures is crucial for engineering new nanoscale photonic and electrical devices with diverse functions. One-dimensional structure offers a number of advances in tailoring material composition, optical and electrical properties, bandgap, and quantum confinement. Quantum material of core-shell nanowire is an outstanding example where the shell layer plays a key role in prompting materials properties and device performance.

Here, we report the realization of unique InAsSb-based core-shell nanowires and their application for room temperature infrared photodetection. The advances of these core-shell nanowires will be discussed. We will also demonstrate core-shell nanowire photodetectors with a dramatic dark current reduction in 2 orders of magnitude and a massive photocurrent (6-fold) in comparison with bare InAs nanowire photodetector. Our study demonstrates the potential of core-shell nanowires for the next generation of photodetectors on silicon.

Biography:

Sudip Chatterjee is presently working as an Associate Professor in the department of Basic Science at a premier Institute of India. He had received his Ph.D.degree on some electronic transport properties of nanomaterials from Jadavpur University, Kolkata in 2005 and he continued his post doctoral research at TuDelft, The Netherlands. Presently he is working in the field of characterization and synthesis of bio-nano materials since 2008 and he had carried number of projects as the principal investigator and co investigator under the sponsorship of some premier research institutes. He has published more than 35 papers in reputed international journals. He has worked as a Senior Lecturer in St Xavier’s College, Kolkata, also as an Assistant Professor at Sikkim Manipal Institute of Technology, Sikkim, India and also he has served as the Assistant Professor at the IFHE University, India.

Abstract:

The semiconductor super lattices (SLS) have found wide applications in many electronic device structures and bio devices such as photo detectors, light emitters, avalanche photo diodes, compensatory transistors, tunneling devices, genetic diodes etc. The most extensively studied SL is the one consisting of alternate layers of GaAs and Ga_1-xAl_xAs, owing to its fabrication. The GaAs layers form the quantum wells and the Ga_1-xAl_xAs layers form the potential barriers. We wish to note that, the afore mentioned SLS have been proposed with the assumption that the interfaces between the layers are sharply defined with zero thicknesses so as to be devoid of any interface effects. As the potential form changes from a well (barrier) to a barrier (well), an intermediate potential region exists for the electrons. Thus the influence of the finite thickness of the interface on the carrier dispersion law becomes very important since, the carrier energy spectrum governs all the transport properties. In this paper, we shall investigate the DMR for the most interesting case which occurs in QDSLs of graded interfaces and compare the same with that of the constituent materials by formulating the respective one dimensional electron dispersion laws. The proposed approach has been implemented and tested on an embedded system, and it exhibits a good performance for monitoring / diagnosis applications.

Biography:

Imjeong Ho-Soon Yang has completed her PhD from University of Georgia, USA and postdoctoral studies from Argonne National Laboratory. She is the professor at Deptartment of Physics, Pusan National University, Korea. She has published more than 75 papers in reputed journals.

Abstract:

Quantum dots (QDs) have been attracting considerable interest for both fundamental researches and industrial development due to their spectral and size tenability. They have been ideal candidates for tunable light emitters in various applications such as biological imaging, lasers, light-emitting diodes, and optical amplifiers. Narrowly size distributed QDs with photostability are required to meet the application quality. Synthesis of graphene oxide quantum dots (GOQDs) have been studied intensively as their characteristic property led to wide applications in photovoltaic cells, ultracapacitors, and biosensor. Especially, non-toxic GOQDs are potential material in the field of medicine and biology.

GOQDs with different oxygen content and types were prepared through the photo-thermal reduction process in this work. The oxygen-containing functional groups such as epoxy, hydroxyl, carboxylic, and carboxyl groups are one of the crucial elements for determining the optical properties of GOQDs. Here we report the synthesis of GOQDs through the photo-thermal reduction process with the intense pulsed light (IPL) which decomposes the oxygen-containing functional groups as irradiation energy density varied. Photoluminescence of the photo-thermally reduced GOQDs exhibited a blue shift, which can be explained with decomposition of the oxygen-containing functional groups at the surface of GOQDs. The physical and optical properties were investigated by using Raman spectroscopy, x-ray photoelectron spectroscopy, photoluminescence, UV-vis spectroscopy, and time-resolved photoluminescence. This result suggests that the photo-thermal process with IPL provides an effective reduction of the oxygen-containing functional groups at the surface of GOQDs.

Biography:

Abstract:

Locomotion of bacteria in fluid at small scale is accomplished by cilia and flagella present on its surface. In nature, presence of cilia exhibits various applications such as movement of egg for fertilization in female, mucus and dust removal from lungs and circulation of cerebrospinal fluid in brain. In literature, artificial cilia has been fabricated and used for mixing and movement of fluid in microfluidic applications. In the present study, the branches (cilia) on flagella (paramecium) has been employed as tree branch concept for designing of artificial nanoswimmer and experiments have been performed at scaled up level in silicon oil medium to mimic human body environment. The effects of primary branches have been investigated by fabricating the branched flagella using flexible PDMS (polydimethylsiloxane) biocompatible material suitable for human body and biological applications. It has been observed that by increasing number of primary branches from 14 to 28, increase in deflection approximately 23% has been observed. The observed deflection is correlated to the thrust force developed by the propulsion of flagellated nanoswimmer. The thrust force generated due to planar wave actuation of flagella is being picked up by laser micrometer in terms of displacement of cantilever beam. The work also provides a theoretical model that supports the experimental results. The concept of self- tuning also have been studied through statistical analysis probability density function (PDF) which means variations in deflection data can be decreased by increasing number of primary branches.

The current study focus on how branched density affects the output performance in terms of self-tuning and thrust force generation for different model of nanoswimmer. Two designs of nanoswimmer have been investigated experimentally to prove the hypothesis and results are leading towards possible design by improving the efficiency of nanoswimmer. The statistical analysis is performed to endorse the self-tuning and thrust force conception of designed nanoswimmer via probability density function (PDF) and root mean square (RMS) plot of recorded deflection from experimental study. In literature, the effect of viscosity also can be seen to examine the increase in thrust force for nanoswimmer which is also being considered in the present work.

Biography:

Yoshiharu Mitoma, PhD in Chemical Engineering (1997, Kyushu University), is now full Professor and Dean of Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima. Dr. Mitoma was awarded the Young Chemist Award in Asian Chemical Congress (Federation of Asian Chemical Societies) in 2005 in Seoul, Korea, and the Young Chemist Award at the International Conference on Environmental Science and Technology, in Houston, Texas, USA. He was a peer in the jury for different projects of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and for the Ministry of Economy, Trade and Industry (METI) in Japan. 

Abstract:

The remediation of heavy metals (HMs) and radioactive cesium-contaminated soils followed a rapid upward trend in Japan, especially after the consequently to the tragic events that occurred at the Fukushima Dai-ichi Nuclear Power Plant (FDNPP), provoked by the massive quake and subsequent tsunami, on March 11, 2011. HMs and radioactive cesium-contaminated sites pose a serious hazard to public health and the environment. Therefore, many researchers had focused their research on the development of separation and solidification techniques for pollutants in polluted soils. We have recently shown that nano-sized metallic calcium/calcium oxide (nCa) and/or nano-size iron dispersing (Fe-nCa) mixtures are most effective for HMs immobilization and volume reduction method under dry condition. The efficiencies can be enhanced further to 98-100 wt% by using additional nCa. Moreover, due to the magnetic behavior of the soil treated with the Fe-nCa system, two soil fractions can be easily separated: 36-45 wt% of magnetic soil (with 85-95 % HMs concentration) and 64-55 wt% of non-magnetic soil fraction (presenting lower HMs concentration – only 10-20 %). Further, we also reported that Fe-nCa could easily coat and separate the immobilized pollutants. In the present study we have also used the lighter weighted functional magnetite (Fe₃O₄). Mixing 2% Fe₃O₄ to about 2.8kg of dry (14,300 Bq/kg initial radioactive concentration), contaminated soil afforded subsequently to a strong magnetic separation (two soil fractions: 1.1 kg of magnetic and 1.7 kg of non-magnetic soil). The magnetic part’s radioactive concentration was 23,600 Bq/kg, while the non-magnetic part presented only 7,660 Bq/kg, lower than the 8,000 Bq/kg allowed regulatory threshold.

Biography:

Elisa Ang is a PhD student in the School of Mechanical and Aerospace Engineering at Nanyang Technological University, Singapore. She received her Master’s degree in Applied Mathematics from Delft University of Technology and Computer Engineering from the University of Erlangen-Nuremberg in 2015. Her current research topic is on the analysis of one- or -two dimensional materials in desalination processes. In this topic of 2D materials membrane design, she has published 6 papers in reputed journals and presented in 3 conferences over the past 3 years.

Abstract:

The transverse flow carbon nanotube (CNT) membrane (TFCM) is a membrane design based on CNTs stacked horizontally one on top of another, forming hourglass slits that allow fast water passage while blocking solutes. Using molecular dynamics, we show that TFCM offers permeability a few orders of magnitude larger than conventional polymeric membrane, and even more than twice that of two-dimensional graphene slit membranes. In this presentation, we will delve into the reasons why this simple design enables such high permeability and good rejection performance. We will also look at the TFCM’s performance with variation in CNT size and CNT layers. Though our simulations, we show that the TFCM design has much advantage over its axial flow CNT membrane counterpart. Our computational work provides evidence that transverse or outer flow CNT membrane is a simple and innovative design that could significantly improve future membranes’ performance, reducing the energy cost of membrane separation process like desalination.

Biography:

Hana Abdali is currently a PhD candidate fellow in chemical engineering, Polytechnique de Montréal, Quebec, Canada. She received her BE degree in Chemistry from the University of Dammam, Saudi Arabia and MS Ac degree from Polytechnique de Montréal, Canada in 2007 and 2015, respectively. She is now engaged in research and development of resistive type CO₂ gas sensors.

Abstract:

Nanomaterial have become more relevant because of their widespread and common applications in the several areas including industrial production, environmental studies, medical applications, etc.. Among these nanomaterial, graphene has attracted particular interest due to its exceptional chemical and excellent electronic properties, optimal mechanical stiffness, and electrical conductivity, which are desirable properties in fabrication of gas sensors. Bacterial cellulose (BC) has many structural aspects favourable for several applications, among which high surface area, a large number of mesopores and macropores and nanoscale fibers in three dimensional (3D) structure. These advantages have led to successful covalent intercalation of amino-functionalized graphene (AG) with BC fibres via a one-step esterification.

Conducting polymers including polyaniline (PANI) is easily synthesized and its molecular chain structure can be modified conveniently by copolymerization or structural derivations. Its unique electrical, electrochemical, and optical properties can also be utilized as efficient sensors for

monitoring organic and inorganic compounds. Therefore, it is expected that the AG/BC/PANI nanocomposite can enhance the sensitivity and selectivity of sensors, through the combination of these excellent sensing materials.

In this study, we designed and synthesized a AG/BC/PANI flexible nanocomposite gas sensor. The crosslinking was carried out by using a one-step esterification process to construct crosslinked BC/AG (CLBC/AG) and followed by the growth of PANI chains on the CLBC/AG substrate. The morphology of the samples were characterized by scanning electron microscopy (SEM) and the electrical conductivity variation of the AG/BC/PANI with different reaction times at room temperature was investigated.

Biography:

Amira Mohsen received  her PhD degree in pharmaceutical sciences from Cairo university in 2012. She has her expertise in pharmaceutics and pharmaceutical technology. Her professional interests focus on drug formulation and drug delivery systems. She is currently working as associate professor in pharmaceutical technology department, National Research Centre, Cairo, Egypt. Moreover, she is a member of several projects and has a lot of scientific activities.

Abstract:

Acetazolamide (ACZ), a carbonic anhydrase inhibitor, is used to reduce the eye pressure in people suffering from glaucoma. ACZ has limited aqueous solubility and poor corneal permeation. The objective of the present study was to attain enhanced ocular delivery of ACZ via its incorporation into bilosomes. ACZ loaded bilosomes were prepared by the thin film hydration technique employing Span 60, cholesterol and different bile salts (sodium cholate, sodium deoxycholate, sodium taurocholate and sodium tauroglycocholate). They were further characterized via particle size and zeta potential analysis in addition to transmission electron microscopy. In vitro release studies were performed using diffusion bag technique. The developed formulations exhibited high entrapment efficiencies up to 74.23. They were spherical in shape and their sizes were in the nanometric dimensions ranging from 349.8 nm to 734.6 nm with negatively charged zeta potential values (<-43.4 mV). In vitro drug release profiles revealed sustained release of the drug up to 8 hours. In vivo pharmacodynamic assessment of the optimized ACZ bilosomal formulation, employing male albino rabbits, revealed enhanced and prolonged intraocular pressure lowering effect compared to plain ACZ suspension, marketed ACZ oral tablets as well as marketed dorzolamide eye drops. Furthermore, in vivo ocular irritancy test proved the safety of the optimized bilosomal formulation after ocular application.