Scientific Program

Day 1

Keynote Session:

Kholmurad Khasanov

Moscow State Lomonosov University, Russia

Title: A powerful explosion of light and the synthesis of porous nanomaterial

Biography:

Kholmurad Khasanov has been working as a prime investigator in the physics area for almost 40 years, and achieved one of his most iconic discoveries in 2011, when He designed and started experimenting with his dynamic emitter. He has published about 100 papers in reputed journals. He has collaborated with several international organizations including NASA and "The Smithsonian"; my works can be found in the "Astrophysics Data System" under the Fluid Dynamics section. My experiments show great results in the production of nano-structures, and the application

Abstract:

American scientist D. Fisher paid attention to the "point of infinite compression, a special “singular” point. Mathematically, it corresponds to a function having an explosive derivative. Professor of the University of Munich R. Kippenhan in his work noted that "from the surface of the star quantum electromagnetic radiation rushes into interstellar space." reaching our atmosphere creates converging spherical waves leading to an infinite point of compression, having an explosive character. Our studies have shown that these electromagnetic waves are to a large extent the ultraviolet radiation of the near range of 400-300nm. The near ultraviolet range is often called “black light,” since the human eyes do not recognize it. Black light when colliding with the atmosphere continuum forms converging spherical supercompression waves. These waves when they reach the atmosphere of the earth create an explosive field.

Our dynamic emitter of the original design generates spherical converging shock waves in a supersonic jet, leading to the point of infinite compression "special point" having an explosive derivative. The jet, interacting with the atmospheric background ultraviolet radiation, entering into the resonance mode generates a powerful explosion of black light (Figure 1) [3], the energy of which provides the synthesis of porous nanomaterial. The principle of operation of the emitter in practice has shown that the energy of a powerful explosion of black light in the laboratory and in production is a safe, cost-effective source of energy.

11:30-12:10

Gowra Raghupathy Dillip

Indian Institute of Science, India.

Title: Intentional vacuum annealing induced, surfactant-initiated surprising carbon doping @ zinc oxide decorated graphitic carbon nano fiber hybrid thin films for Interfacial Stress-Grading Applications

Biography:

G.R. Dillip is an INSPIRE Faculty in the Solid State and Structural Chemistry Unit, Indian Institute of Science, India. Previously, he was worked as an Assistant Professor in the School of Mechanical Engineering, Yeungnam University, South Korea. He finished his Ph.D. Degree in Physics from Sri Venkateswara University, India in 2013 and after that he joined at Yeungnam University, South Korea. He has authored ~40 scientific articles in various reputed International Journals, a Book Chapter and also presented his work in both National and International Conferences and participated in several Workshops. He also registered a Korean Patent. His research interests include various defect-mediated studies of carbon based metal oxide nanocomposites/hybrids for energy-related applications (such as Supercapacitors/Batteries) and also rare-earth doped optical materials for solid state lighting devices.

Abstract:

The efficiency of the high-power, high-voltage (HV) insulation system is currently approaching a saturation level due to the limited availability of the high-quality resistive stress-grading material that can withstand ever-increasing applied voltage at very low insulation-wall thickness. A unique non-rectifying, non-linear current-voltage characteristic is observed in ZnO nanoparticle-anchored carbon nanofiber (ZnO-CNF) hybrid thin film devices, which has novel applications in non-linear stress-grading materials for high-voltage devices and overvoltage protectors in multifunctional electronic circuits. A simple chemical precipitation method is used to fabricate the hybrid films, followed by vacuum-annealing at elevated temperatures. Interestingly, the organic surfactant (Triton X-114), used as binder during the film deposition, manifests unintentional carbon-doping into ZnO lattice, which leads to a conductivity inversion of ZnO from n-type in lower-temperature (300 ºC) annealed hybrid into p-type in the higher-temperature (600 ºC) annealed film. The novelty of this work is that, the CNF-ZnO interface acts as a metal-semiconductor (M-S) junction, where high conducting CNF acts as the metal and ZnO NPs as the semiconducting (n- or p-type) counterpart (denoted as MCNF-Sn/p-ZnO junction). The band-energy calculations have revealed that the barrier height at the MCNF-Sn/p-ZnO junction is quite low to manifest non-rectifying characteristics (i.e. the I-V curves are near-symmetric in both forward and reverse directions). Additionally, a large number of C-atoms (from the surfactant) are not only doped into the ZnO lattice, but also reside at the ZnO-CNF interface as trap states. Electrical characterizations reveal that the CNF-ZnO interfaces act as a metal-semiconductor junction with low barrier height, leading to non-rectifying junction properties. Also the surfactant-induced C-atoms create trap-states at the interface which ‘emit’ the trapped charges via interfacial field-assisted tunneling, thus imposing non-linearity (in both forward and reverse directions) on the I-V curves.

5.00

Janardhan Reddy Kodurua

Kwangwoon University, Republic of Korea

Title: Lanthanides-Graphene Oxide Nanocomposites for Sustainable Groundwater Remediation

Biography:

Janardhan Reddy Koduru received his Ph.D. in chemistry from S.V. University, Tirupati, and Andhra Pradesh in 2007. After completing his three years postdoctoral fellowship at Kyungpook National University, South Korea, he worked as assistant professor of chemistry at Dongguk University from 2011-2012. He is currently an associate professor of Environmental Engineering at Kwangwoon University, Seoul, South Korea since 2013.

His research interests include the development of low toxicity nanomaterials or nanocomposites by synthetic chemistry or green routes for sustainable energy and environmental remediation applications. He received the prestigious academic awards and best (oral/poster) presentation awards from various national and international Conference societies. He has published over 70 papers and has submitted three Korean patent applications.

Abstract:

Lanthanide oxides (RE2O3) have been similar properties like transition metal (III) oxides and have good chemical durability and low phonon energy. Recently, the lanthanum(III) (La(III)) composites was utilized for selectively removal of phosphorus1,2 and that resultant studies have been conclude that the La(III) is superior than to Fe(III) or Al(III) in the pH range of 4.5-8.5. However, Gd2O3 have similar behavior like widely used metal oxides for removal of metal ions, such as La(III), Fe(III) and Al(III). In addition, Gadolinium (Gd) and its oxonium ions possess a large magnetic moment3. Moreover, Gd can combine with nitrogen, carbon, sulfur, phosphorus, boron, selenium, silicon, and arsenic at elevated temperatures, forming binary compounds. However, Gd based nanocomposites have not been applied for waste water treatment so-far. Hence, in the present study, prepared hybrid composites, Lanthanum oxide-Graphene oxide (La(III)-GO) and Gadolinium oxide-Graphene oxide (Gd(III)-GO) for groundwater remediation.

U(VI) found as pollutant sources in aqueous environment such as the groundwater and some surface water contexts. Radionuclides not only originates from the nuclear industry but also from other anthropogenic activities such as lignite burning in power stations, ore processing, and the use of fertilizers4,5. LGO hybrid composite was prepared by simple sonication method. As synthesized LGO composites were well characterized using XRD, XPS, FT-IR and FT-Raman. The surface area and morphology of LGO were studied using SEM-EDX and BET analysis. The spectral characterization studies proved the purity of compound. The surface composition and morphology studies results conclude that the prepared LGO were a smart hybrid for favorable adsorptive removal of uranium. The adsorption studies found that the uranium adsorption onto LGO was achieved more than 95%. The overall results conclude that as prepared LGO can be successfully apply for removal of uranium from real groundwater.

T.V.M. Sreekanth

Yeungnam University, South Korea

Title: Microwave irradiation: In-situ conversion of nanoflakes to nanoflowers of ZnCo2O4 on Ni foam for enhanced electro-catalytic activity

Biography:

Dr. Sreekanth received his PhD in Chemistry from S.V. University, India, in 2009, under the supervision of Prof. K.S. Reddy. Afterthat, he joined as an Assistant Professor in the Department of Chemistry, Dongguk University, Gyeongju, South Korea, Later, he moved to College of Mechanical Engineering, Yeungnam University, South Korea. His research interests include metal / metal oxide nanoparticles for Catalytic applications. His recent research activities focus on electrochemical energy storage.

Abstract:

Spinel structure metal oxides provides the effective performance towards the electro-catalytic analysis. Among the spinel structure metal oxides, ZnCo2O4 has effective in the area of photocatalyst, gas sensor, li-ion batteries, supercapacitors and electro-oxidation. The performance of direct methanol fuel cells hinges on the activity of the catalyst. To enhance the electro-catalytic activity, a flower-like nanostructure of ZnCo0O4 assembled on nickel foam (NF) via microwave irradiation process, the whole process was finished within 15 min. The ZnCo2O4 nanoflower is successfully applied in the electro-catalytic oxidation of methanol and its electro-catalytic performance is investigated by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy, which exhibits excellent electro-catalytic activities towards methanol electro-oxidation in alkaline medium, including low onset potential (0.45 V), high current densities (222.3 mA cm-2) at 0.70 V (vs. SCE), and desirable electro-oxidation stability (91%) after 500 cycles in the presence of 1.0 M KOH mixed with 0.5 M methanol. The electrochemical oxidation of MeOH was also observed at higher concentration of MeOH up-to 4.0 M (0.5, 1.0, 2.0, 3.0 and 4.0 moles). The high electrochemical performance is mainly attributed to faster ion/electron transfer and an enhanced electrochemical kinetics. The present simple, and cost-effective synthesis approach can open new era for large-scale applications of the novel materials for different electrochemical applications

Oral Session 1:

Invention And Innovation Of New Concepts In The Field Of Advance Material

Chair

Kholmurad Khasanov

Moscow State Lomonosov University, Russia

Co-Chair

Gowra Raghupathy Dillip

Indian Institute of Science, India.

Janardhan Reddy Kodurua

Kwangwoon University,Republic of Korea.

Title: Lanthanides-Graphene Oxide Nanocomposites for Sustainable Groundwater Remediation

Biography:

Abstract:

Gyeong Hun Baeg

National University of Singapore, Singapore

Title: Silver nanoparticles disrupt germline stem cell maintenance in the Drosophila testis

Biography:

Dr. Baeg Gyeong Hun completed his Ph.D. in Biomedical Science at the Osaka University School of Medicine, Japan and his Postdoctoral studies at Harvard Medical School, Boston. He has also worked as an Assistant Professor in the Department of Pediatrics at New York Medical College, USA. He is currently working as an Assistant professor in the Department of Anatomy at the National University of Singapore, Singapore.

Abstract:

Silver nanoparticles (AgNPs), one of the most popular nanomaterials, are commonly used in consumer products and biomedical devices, despite their potential toxicity. Recently, AgNP exposure was reported to be associated with male reproductive toxicity in mammalian models. However, there is still a limited understanding of the effects of AgNPs on reproduction, particularly on spermatogenesis. The fruit fly Drosophila testis can serve as an excellent in vivo model to elucidate the mechanisms underlying AgNP-induced defects in spermatogenesis, as germ lineages can be easily identified, traced and imaged. In this study, we evaluated AgNP-mediated toxicity on spermatogenesis by feeding Drosophila with AgNPs at various concentrations. We first observed a dose-dependent uptake of AgNPs in vivo. Concomitantly, AgNP exposure caused a significant decrease in the viability and delay in the development of Drosophila in a dose-dependent manner. Furthermore, AgNP-treated male flies showed a reduction in fecundity, and the resulting testes contained a decreased number of germline stem cells (GSCs) compared to controls. Interestingly, testes exposed to AgNPs exhibited a dramatic increase in the levels of reactive oxygen species and showed precocious GSC differentiation. Taken together, our study suggests that AgNP exposure may increase ROS levels in the Drosophila testis, leading to a reduction of GSC number by promoting premature GSC differentiation.

Yoon-Young Chang

Kwangwoon University, Seoul, Korea

Title: Application of Encapsulated Zero-Valent Iron on the Treatment of Cr(VI) in the Presence of Different Contaminants

Biography:

Prof. Yoon-Young Chang is a Professor at Kwangwoon University, Seoul, Korea. His major is Environmental engineering, especially, physicochemical treatment of water and soil containing toxic heavy metals and organic pollutants. He has also made significant contribution in the development of an advanced technologies and reactive materials for surface and ground water remediation along with soil remediation. He has more than 150 publications in peer-reviewed international journals and more than 200 reports in international and national conferences.

Abstract:

The increasing contamination of urban and industrial wastewaters by toxic metal ions is a worrying environmental problem. Among them, Chromium (Cr) is a kind of redox-sensitive pollutants. Especially, hexavalent chromium (Cr(VI)) is known as carcinogen,1 which is relatively toxic compared to trivalent chromium(Cr(III)).2 Nano zero-valent iron (nZVI) has been proven to be an effective material for the reductive precipitation of Cr(VI).3 Inside the reactive barriers, both Fe0 and the Fe2+ can be released from aerobic corrosion of Fe0 as well as redox reaction between Fe0 and Cr(VI). The reduced chromium (Cr(III)) can be precipitated as Cr(OH)3 or chromium-iron oxides / hydroxides / oxyhydroxides on the Fe0 surface.4,5 But, nZVI is easy to corrode by environmental impact due to its rapid reactivity. Considering this property, modification of nZVI is strongly needed. One of the modification methods is encapsulation of nZVI with polymeric material. The microcapsule containing nZVI can exhibit sustained releasing characteristics to enhance the stability and persistence of nZVI. Encapsulation is expected to ensure better contacts between contaminants and encapsulated nanoparticles. In addition successful encapsulation of nZVI is expected to lead to the development of more effective and robust environmental remediation techniques involving co-encapsulation of nanoparticles. The objective of this study is to examine the effectiveness of the encapsulated iron nanoparticles (@nZVI) for the treatment of wastewater contaminated with chromate. Furthermore, when the Cr(VI) is present together with various ions in the water, the reaction characteristics of the nZVI are also investigated. The @nZVI before and after reaction with chromium is characterized using X-ray photoelectron Spectroscopy (XPS), X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FT-IR) and Scanning Electron Microscope (SEM). Batch experiments are performed to investigate the effects of pH, Cr(VI) concentration, contact time and co-presented inorganic species on the removal kinetic and removal efficiency of Cr(VI) by @nZVI.

Ankan Dutta Chowdhury

Shizuoka University, Japan

Title: Electrochemical Biosensor for Virus Detection

Biography:

Ankan Dutta Chowdhury has completed his PhD in the year of 2015 from Saha Institute of Nuclear Physics, under Calcutta University. Later he did 2 years Postdoctoral Studies from National Chiao Tung University, Taiwan. Currently, he has been working as JSPS Postdoctoral fellow in Shizuoka University, Japan. He has published more than 20 papers in peer reviewed journals and two book chapters.

Abstract:

Viruses are a major cause of human diseases which needs an early detection to prevent an outbreak. The development of biosensor would ideally produce a quantitative signal for individual viral particles. In this work, a pulse-triggered ultrasensitive electrochemical sensor has been fabricated using graphene quantum dots (Ankan Dutta Chowdhury and Ruey-an Doong) and gold-embedded polyaniline nanowires, prepared via interfacial polymerization and then self-assembly approach (Ankan Dutta Chowdhury, Rupali Gangopadhyay and Amitabha De). Introducing an external electrical pulse during the virus accumulation step increases the sensitivity towards viruses due to the expanded surface of the virus particle as well as the antibody-conjugated polyaniline chain length, compared to other conventional electrochemical sensors (Ankan Dutta Chowdhury, Kenshin Takemura, Tian-Cheng Li, Tetsuro Suzuki and Enoch Y. Park). Under optimal condition, the proposed biosensor demonstrates its ability to detecting viruses in a wide linear range with a low detection limit of 96.7 copies mL-1. In addition, the virus samples that collected from cell culture supernatant and fecal specimens of infected monkey were also used to confirm its applicability. The sensitivity is similar with that detected by real-time quantitative reverse transcription-polymerase chain (RT-qPCR). The result suggests that the proposed sensor can pave the way for the development of robust, high-performance sensing methodologies for virus detection.

Jae-Kyu Yang

Kwangwoon University, South Korea

Title: Organoclay Hybrid Materials based on clay minerals and nonionic surfactants as interesting adsorbents in water remediation

Biography:

Jae-Kyu Yang is a physico-chemist of the soft condensed matter and is interested in the stability and the microstructures generated from the mixtures of inorganic particles associated with membranes phases made of organic moieties (surfactants, lipids and other biological systems). Such association of different colloidal objects represent original routes for the preparation of nanomaterials showing environmental applications for instance.

Abstract:

Due to their large specific surface area, but also other features such as: ion exchange capacities and outstanding hydration properties clay minerals were used as adsorbent materials, reinforcers in polymer nanocomposites after a chemical modification of their surface. As 2D confinement host matrixes, these layered minerals represent interesting materials to preserve biomolecules or other functional organic species and to orientate them as well for the preparation of thin organic films.

Amphiphilic molecules such as both cationic or nonionic surfactants can be used as chemical modifier to prepare hybrid organoclay materials based on clay minerals, leading to the generation of a hydrophobic environment. The intercalation of the surfactants switches the hydrophilic nature of clay mineral surface to hydrophobic and opens its interlayer space at large value enlarging the possible applications of raw clay minerals. These organic moieties can be also associated with raw clay mineral in solution as original systems for the adsorption of pollutants in water remediation strategies.

In this present contribution, we focus on the preparation of novel organoclays based on nonionic surfactants and discuss and compare their properties and possible uses to conventional cationic organoclay systems (i.e. prepared with alkylammonium cationic surfactants) and raw clay minerals. Non-ionic organoclays with their dual hydrophilic/hydrophobic behaviors, unlike cationic ones showing a hydrophobic surface, and untreated clay minerals displaying a hydrophilic behavior, represent polyvalent materials for the adsorption of a wide range of micropollutants showing different chemical nature.