Program Schedule

Keynote Speakers

Chris G Whiteley
Rhodes University ; Grahamstown SOUTH AFRICA
Title: Computer Simulations for the Interaction of Silver Nanoparticles with Triosephosphateisomerase: Nanomedical Implications for Malaria.

Biography: Chris G Whiteley is Emeritus Professor Biochemistry at Rhodes University, South Africa and Distinguished Research Professor at National Taiwan University & Technology.

Abstract: The fight against infectious diseases can be manifested by consideringdifferences in structure between specific biomedical targets (enzymes) in the human host and the parasite. The interaction of silver nanoparticles (AgNP) with triosephosphateisomerase (TIM) is modelled using a molecular dynamics simulation computer programme. The simulation of the ‘docking’, first as a rigid-body docked complex, and eventually through flexible-fit analysis, creates ten different enzyme-nanoparticle complexes. The rigid-body docked complex is conformationally flexible to accommodate the AgNP that orientates itself within the ‘docking’ site until a more stable structure is formed at convergence. Normalisation of the data obtained from changes to interactive binding energy profiles, rmsd, B-factors, dihedral angles [phi, Δφ; psi, Δψ; chi, Δχ], volume occupied by Cα [ΔVcα], secondary structural elements (α-helix, β-strand, random coil), number of contact residues, their hydrophobicities, solvent accessible surface area and surface electrostatic potentials of each of these AgNP-TIM complexes is computed. Summation of these data narrows the selection to one or two final probable AgNP-TIM structures. Silver nanoparticles (60 nM; 2– 4 nm diameter) selectively inhibited recombinant triosephosphateisomerase from Plasmodium falciparum (PfTIM) with a 7-fold decrease in enzyme catalytic efficiency over the human enzyme (hTIM). These enzymes were expressed, purified and characterised. High specific activity (1207 with a fold purification of ~1.8 and a yield of 48 % were (hTIM) after gel filtration while, in contrast, PfTIM afforded a specific activity of 1387 with a fold purification of ~6.8 and a yield of 57 %.PfTIM had an optimal pH and temperature, Km and Vmax of 5.25, 25 °C, 12.8 mM and 1.13 μ min respectively while for hTIM the pH and temperature optima, Km and Vmax were 6.75, 30 °C; 8.2 mM and 1.35 μ Respective Ki values were 283 nM [hTIM] and 85.7 nM [PfTIM]. Key structural differences between the two enzyme variants, especially with Cys13 at the dimer interface of PfTIM, were significant to suggest unique characteristics allowing for selective targeting of PfTIM by AgNPs.

Nanocomposites / Bionanocomposites Materials

Session Introduction

Walter Kaminsky
University of Hamburg, Germany
Title: Metallocene based polyolefin nanocomposites with special properties

Biography: Walter Kaminsky received his PhD degree in chemistry from the University of Hamburg in 1971. He was a professor for Technical and Macromolecular Chemistry at the University of Hamburg (1979-2008), is now retired and consults in the field of polyolefin nanocomposites, catalysis, and recycling of plastics and scrap tires by pyrolysis. His research focused on synthesis of polyolefin nanocomposites by a high active, soluble metallocene catalyst system and the development of a technical pyrolysis plant for getting valuable fractions from hydrocarbon containing waste. He was President of the German Chemical Society GDCH, Hamburg section, Dean of the Chemical Faculty of Hamburg University, Director of the Institute for Technical and Macromolecular Chemistry, and published more than 400 papers/books and holds 30 patents. He has received many awards and honors such as the European Research Prize, the Carothers Award (USA), the Walter Ahlström Prize of the Finnish Academies of Technology, the Benjamin Franklin Medal (USA), and the Hermann-Staudinger prize and is Honour Doctor of the Aalto University, Finland and Honour Professor of the East China and Zhejiang Universities.

Abstract: In the last years, much research in academic and industrial laboratories has focused on poly-olefin nanocomposites because of their high potential as materials with novel properties. Exceptionally strong polyolefin nanocomposites can be synthesized by in-situ polymerization with metallocene catalysts. The metallocene/methylaluminoxane catalyst, soluble in hydrocarbons, is absorbed on the surface of the nanofiller, then by addition of ethene or propene, a polyolefin film is formed, covering the nanoparticles, layered silicates, or fibers. Polyolefin nanocomposites produced by in-situ generation show better mechanical properties than material produced by mechanical blending. Monospheres (balls of silica, diameter 200-250 nm), carbon fibers (diameter 200 nm, length 0.5-3 mm), and multi-walled carbon nanotubes (diameter 15-25 nm, length 50 µm) were used as fillers. Before polymerization, the fillers were separated by ultra sound and then treated by the catalyst. The thickness of the polyolefins on the surface can be controlled by the pressure of ethene or propene and by the polymerization time. By this method, highly filled polypropylene nanocomposites can be obtained with a silica content of up to 85 wt%. Such combined materials are stiff and hard. Every particle is sur-rounded by a thin film of polyolefin with a thickness of 30 to 100 nm. Carbon fibers and carbon nanotubes are covered with isotactic or syndiotactic polypropylene. Because of the hy-drophobic character of the carbon surface, the polymer is drawing on the fiber. This leads to a reinforced combined polymer with special properties. The crystallization temperature is 10 °C higher and therefore the crystallization rate up to 20 times faster than that of pure syndiotactic polypropylene. The form stability increased by 100 % if 3 wt% of carbon nanotubes are in-corporated.

Takayuki Kato
Ashikaga University, Japan
Title: Molecular Parity Violation of Copper complex

Biography: He had research and development work in Thosiba Silicon Company after getting Master degree in graduate course of Gunma University. He had assistant work in Ashikaga Institute of Technology in 1980, continuously to be lecturer and assistant professor 2006, and associate professor 2007, and associate professor 2017 in Ashikaga University.

Abstract: There were great discussion and papers concerning with Molecular Parity Violation since from ‘Question of parity conservation in weak interactions’ by T. D. Lee, and C. N. Yang, Phys. Rev., 1956. It was followed that hydrogen atom must have optical activity by the chiral WNC (weak neutral current) between electron and proton (F.C Michel, 1965). It was impossible to realize because WNC was too law energy to detect it. Study had been done to amplify APV(atomic parity violation) energy employing heavy atom by Zel’ dovich (1966). R. A. Harris showed a very suggestable theory (1978) that the Hund’s Paradox (tunnel quantum effect) was combined with Quantum Vibration to amplify PVED (parity violence energy difference) resulting in molecular chiral vibrational stage to be appeared. STM (scanning tunnel Microscope) has already realized in physical field. In the context of above history, I was interested in Molecular Parity Violation of copper complex in chemistry field. I designed a square pyramidal five coordinated asymmetric copper complex inspired from structures of phthalocynate-copper (II), hemocyanin and vitamin B12 etc. I synthesized Aqua[(6-carboxyl-2-pyridylamide)hisutaminato]copper (II) 1 and some related copper complexes. We have reported the crystal and molecular structure of 1 defined by X-ray crystallographic analysis (ANALYTICAL SCIENCE, 23, 37, 2007). The single crystal of 1 was racemic complex. The fifth apical H2O ligand of 1 is exchangeable to surrounding molecule such as solvent H2O, MeOH molecule in solution. The asymmetric tetradentate ligand of the basal plane gives planar-R or planar-S chirality to 1 depending on the coordination mode of the apical ligand to central copper atom. It is that the clock wise sense atom order of the basal plane seeing from the apical ligand gives planar-R chirality to 1. The counter clock wise sense atom order of the basal plane gives planar-S chirality to 1. At the same time, this designed asymmetric basal plane would give the chiral quantum vibration mode to the central copper atom because of R. A. Harris suggestion. The PVED of 1 was amplified to planar-R enantiomer priority side in this system. The planar-R enantiomer of 1 was assigned to [α]D + value in chemistry way which will be shown in the Conference. So that, each enantiomer has itself the diastereomeric effect of the chiral copper atom mode and visible chiral ligation mode of the fifth ligand. Racemic 1 gave the mutarotation phenomenon in polarimetry as chiral sign movements in aqueous methanol solution as shown in Figure 1. The [α]D data showed that it started from +2000° (not 0° is important) in planar-R enantiomer priority equilibrium to increase to +2500° and then to decrease crossing 0° resulted to -1240° in new planar-S enantiomer priority equilibrium reached. It is worthy that the very low polarimetry energy (~10-23J/molecule) was conjugated to PVED and moved the chiral equilibrium between planar-R and planar-S enantiomer of 1 resulted in giving us mutarotation phenomenon as an average intensity data. This data would be recorded as a part of MPV phenomenon of 1. It should be known that the MPV of 1 has exists always even if the detection has not been done in this system. Other relative copper complexes showed almost the same kind of phenomena in polarimetry. Hund’s Paradox and Harris suggestion would be conjugated in this system. The heavy door would be opened

King-Chuen Lin
National Taiwan University, Taipei, and Institute of Atomic and Molecular Sciences, Taiwan
Title: Synthesis and characterization of nanomaterials in applications of sensing and catalysis

Biography: King-Chuen Lin is a Distinguished Professor at National Taiwan University. He received PhD from Michigan State University and postdoctoral career at Cornell University. His research interests are photodissociation and reaction dynamics, materials designed for sensors and catalysts, and single molecule spectroscopy. He received Academic Award of Ministry of Education, Taiwan, in 2014, and Richard B. Bernstein Award in International Conference on Stereodynamics-2018. He serves as an Associate Editor for J. Chin. Chem. Soc.(Taipei) and a member of Editorial Board for Scientific Reports. He has published 202 peer-reviewed papers and edited one book on reaction dynamics and chemical kinetics.

Abstract: Palladium nanoparticles (Pd NPs) immobilized on a garlic skin-derived activated carbons (GACs) was synthesized. The morphology, structure, surface compositions, and textural properties of the GACs and Pd@GAC catalyst were examined by a variety of physicochemical characterization techniques which revealed a dispersion of Pd NPs with average particle size of ca. 21 nm on sheet-like graphitized GACs. The Pd@GAC catalyst, which can be facilely prepared with biowaste feedstocks, exhibited excellent catalytic performances for efficient reduction of Cr(VI) with extraordinary stability and recyclability over at least five repeated catalytic test cycles. On the other hand, we report the synthesis, characterization, and catalytic application of ruthenium nanoparticles (Ru NPs) supported on plastic-derived carbons (PDCs) synthesized from plastic wastes (soft drink bottles) as an alternative carbon source. The catalytic activity of Ru@PDC for the reduction of potassium hexacyanoferrate(III), (K3[Fe(CN)6]), and new fuchsin (NF) dye by NaBH4 was performed under mild conditions. Further, we present ultra-sensitive sensing of a prostate-specific antigen (PSA), which is used as a biomarker to detect prostate cancer, using a molybdenum series (MoO3, MoS2, and MoSe2) of two-dimensional nanosheets (2D NSs). The design of a 2D NS-based PSA aptamer sensor system was demonstrated based on a fluorescence turn-on mechanism in the presence of a target. The detection limit of PSA was achieved to be 13 pM for MoO3 NSs, whereas the MoS2 and MoSe2 systems exhibited a detection limit of 72 and 157 pM, respectively. The in vitro bioimaging measurements were also performed using confocal fluorescence microscopy. Herein, PSA detection was successfully demonstrated in human embryonic kidney 293T (HEK) live cells. Moreover, the MoO3, MoS2, and MoSe2 NSs exhibit excellent biocompatibility and low toxicity; thus, these 2D NSs can be used as a promising sensor platform to detect prostate cancer. More chemical and bio-sensing applications will be reported based on the nanomaterial of transition metal dichalcogenides.

Ding-Bang Xiong
State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, China
Title: Graphene/Metal Matrix Composites: Opportunities and Challenges

Biography: Ding-Bang Xiong is an associate professor in the State Key Lab of Metal Matrix Composites, in Shanghai Jiao Tong University, China since 2012. He received Ph.D. degree in material physics and chemistry from Shanghai Institute of Ceramics in 2007. Between 2007–2010, he carried out his postdoctoral research as Alexander von Humboldt fellow in Marburg University, Germany, and between 2010–2012, he did collaboration research in Kyoto University supported by the Japan Society for the Promotion of Science. His current research focuses on fabrication and properties of metal matrix composite materials.

Abstract: As compared to pure metal, metal matrix composites show enhanced mechanical and functional properties, and have been attracting intensive attention. In recent years, graphene (or its derivate) is considering as an ideal and promising reinforcement for metal matrix composites because of its excellent intrinsic properties (such as high mechanical strength and modulus, high thermal and electrical conductivity), superior strengthening efficiency, flexible feature and nanoscale size. The challenges on successful fabricating high performance graphene/metal matrix composites lie in the uniform dispersion of graphene in metal matrix without structural damages, and also strong graphene/metal interface bonding strength. Additionally, more and more researches have paid attention to improve the properties of graphene/metal matrix composites by designing composite architecture, namely spatial distribution and orientation of graphene in metal matrix. In our group, we have been focusing on fabricating advanced graphene/metal matrix composites with enhanced mechanical, electrical and thermal properties. Metal matrix composites usually show higher strength than pure metal, but at the price of decreased ductility and toughness. As inspired by strengthening-and-toughening effect in natural nacre, we have proposed bio-inspiration concept and fabricated graphene/metal matrix composites with a nacre-like “brick-and-mortar” structure. The bioinspired metal matrix composites show very well balanced strength and ductility/toughness. Moreover, by designing on architecture and interface, ultrahigh electrical conductivity has been obtained in graphene embedded in metal matrix, leading to graphene/Cu matrix composites with electrical conductivity even higher than that of silver. Graphene also provide as promising interlayer for high interface thermal conductance in metal matrix composites.

C. Bor Fuh
National Chi Nan University, Taiwan
Title: Functional nanomaterials on analytical and biochemical analyses

Biography: C. Bor Fuh is a Prof. of Applied Chemistry at National Chi Nan University, Taiwan. He received his PhD from University of Utah and worked as a postdoc research fellow at biomedical engineering department of Cleveland Clinic Foundation in USA. He was a guesting professor at Osaka University in Japan. His major fields of research interest include functional nanomaterials, functional nanoparticles, thin channel, magnetic immunoassay and related techniques for analytical and biochemical analyses.

Abstract: Functional nanomaterials have become useful and popular in many technological applications for recent years. The advantages of functional nanomaterials have been exploited and extended in various applications for many years. This presentation would use various functional nanoparticles as examples to illustrate their advantages on applications of material science and biochemical technology. Several functional nanomaterials would be discussed. Biomarker detection using magnetic immunoassay in thin channels would be emphasized and demonstrated for applications. In comparison with other methods, this method has lower detection limit and wider linear range. This technique has great potential to provide a simple, fast, sensitive, and selective analysis for nanoparticles, proteins, and other biomaterials.

Brahim Attaf
Freelance Expert/Researcher, France
Title: Application of carbon nanotube-based composites for innovative design of wind turbine blades

Biography: Dr Brahim Attaf works as a freelance Expert/Researcher in the field of composite materials and structures. He obtained his Engineering degree from the Ecole Nationale Polytechnique (ENP), Algeria, in 1985, and then his PhD degree from the University of Surrey, Guildford, UK, in 1990. He has previously worked as a Lecturer/Researcher at the University of Blida in Algeria (1990–2000), and he was responsible for design office and quality assurance with composite firms in France (2000–2003). Since 2003 he has been independently involved in sustainability research actions leading to ecodesign of composite materials and structures through the integration of environmental and health aspects into product lifecycle. His main research and teaching interests focus on vibration and stability analyses of composite structures subjected to hygrothermomechanical loading using finite-element approach and experimental investigations. Dr Attaf has published five books, many papers in scientific journals and successfully trained/supervised many engineers and postgraduate students (Master’s and PhD’s).

Abstract: In response to global warming issues and energy access challenges, wind power is seen as a key source of clean energy with no emission of greenhouse gases or air pollution. In this context, the technological interest to develop large and more powerful machines is becoming nowadays a major concern for the wind turbine industry worldwide. Thereby obtaining a high electrical power output depends mainly on the swept area of the rotating blades: the larger the size of blades, the more energy is captured. However, such blades are exposed during their service life to severe conditions of loading which may generate negative effects on their structural behaviour and this may lead to structural damage. To achieve a new design strategy of the actual blades made of glass and/or carbon fibre-reinforced composites, carbon nanotube (CNT) materials, arranged in the form of continuous fibres and embedded in a thermoplastic matrix are intended to replace the classical fibres. The main choice of these nano-composites is believed to be related to the ultra-high performance indices in terms of specific stiffness (E/), specific strength (/) and other physicochemical properties such as thermal and electrical conductivity. These competitive advantages make CNTs a very attractive candidate for the reinforcement of offshore wind turbine blades, enabling the production of ultra-mega sources of clean electricity. In addition, CNTs have the potential to be used as sensors for monitoring the internal health of the blade structure. It is in the context of global efforts to fight against climate change that this research study has been undertaken to boost the design strategy for the future generation of wind turbine blades. In addition, this investigation aims to support the EU’s triple energy target (320 EU’s energy objectives) expected to be achieved by 2020; these are: (i) 20% reduction in greenhouse gas emissions; (ii) 20% rise in the share of renewable energies; and (iii) 20% reduction in energy consumption.

Andrey Pavlychev
St. Petersburg State University, St. Petersburg, Russia
Title: Hierarchical Nanostructures: Distortions in Electronic and Atomic Structure in Intact and Osteorthritis Damaged Areas of Bone Tissue

Biography: Andrey A. Pavlychev, Prof. Dr. St. Petersburg State University (SPbU), Solid State Electronics Department. In 1976 he graduated from the Physics Department of SPbU. In 1981 and 1994 he presented his Ph. D. and Doctoral (doct. phys.-math. sci.) dissertations. Since 1996 he is a professor at SPbU. Lecture courses: “Electronic structure of solids”, “Quantum chemistry of polyatomics”, “Nanophenomena in solids”. Basic research interests: Molecular Physics, Condensed Matter, Hierarchical Nanostructures, Material Science, Medical Physics, Quantum Biology. Joint research with scientific groups in Free University (Berlin), Tohoku University and Photon Factory (Japan) and others.

Abstract: Bone is one of the most complicated hierarchically organized nanostructured material in nature. Material science, biological and medical research discloses the complex hierarchy of the skeleton designs from macro- to nanolevels. Nanolevel studies of bones encounter great difficulty mainly because electronic and atomic structure as well as molecular architecture of their nanoblocks are not fully understood. This gap prevents from successful solution of many fundamental and clinically relevant problems such as the development of new methods of medical imaging at subcellular levels and medical diagnosis of skeletal pathology at early stage too. X-ray absorption spectroscopy, as it was shown [1], provides a sensitive evaluation of relationships between hierarchical organization of bone and its local electronic and atomic structure. In this study we combined X-ray diffraction (XRD) and photoelectron spectroscopy (XPS) to investigate atomic and electronic structure of mineralized bone in intact and degenerativelly damaged by osteoarthritis areas. The medial and lateral condyles of the femur resected during total knee arthroplasty in patients with medial compartmental knee osteoarthritis were used as samples. They were thoroughly cleaned, washed in saline and processed for the measurements. We present and discuss the Ca and P 2p^(-1) and O 1s-1 photoelectron lines of bone in the intact and sclerotic areas. Quantum effects in electronic structure of bone tissue are also discussed. These studies demonstrate the structural and spectroscopic characteristics such as the crystallinity, the binding energis and the Gaussian widths of the photoelectron lines, measured for the areas from the distal and proximal sides of femur bone saw cuts. The distinct difference between healthy and arthritic areas is seen clearly. These results open large perspectives for novel methods of medical imaging of the subchondral bone at the subcellular level.

Atif Mossad Ali
King Khalid University, Abha, Saudi Arabia
Title: Synthesis of ZnO-SnO2 Nanocomposites: Impact of Polyethylene Glycol on Optical and Photocatalytic Properties

Biography: Atif Mossad Ali is an Professor of Applied Nanomaterials Science at King Khalid University, Abha, Saudi Arabia

Abstract: Zinc oxide doped tin dioxide (ZnO-SnO2) nanomaterials were prepared by a sol-gel method without and with different amounts (0.5, 1.0 and 2.0 gm) of polyethylene glycol (PEG). The prepared nanocomposites were characterized Viz., for structural, surface and optical properties. The effect of a PEG on the prepared ZnO-SnO2 nanocomposites is investigated. The photocatalytic activities of the synthesized nanocomposites were evaluated by methylene blue dye degradation under visible light illumination. The ZnO-SnO2 nanocomposites prepared with 2.0 gm of PEG showed the highest degradation efficiency of 85.93%, concluding that adding of PEG enhances the photocatalytic performance of ZnO-SnO2 nanocomposites.


Session Introduction

Tom Lindström
KTH, Sweden
Title: Developments in Nanocellulose processing and applications

Biography: Professor Lindström is a visiting scientist from the Royal Institute of Technology (KTH) in Stockholm, Sweden. Lindström has experiences encompassing both academic (KTH), institutional (Swedish Pulp and Paper Research Institute Innventia, now RISE) and has also worked ten years in the Paper/Board industry. Lindströms background training is in polymer and physical chemistry and colloid and surface science, but the focus has been on various unit operations in pulp and papermaking, particularly in the areas of paper chemistry and paper forming issues. His focus has been on manufacture and up-scaling of years. During the past nanocellulosic materials and various industrial applications of these materials. As a senior scientist, he will devote his efforts to the use and integration of nanocellulosic materials in the area of water treatments.

Abstract: There is a whole family of different nanocellulosic nature-based materials, which may be divided into, nanocrystalline cellulose (CNC), nanofibrillar cellulose (CNF) and bacterial nanocellulose (BNC) and algal (Cladophora) nanocellulosics (ANC). The history of these nanocellulosics goes back, at least, to the 1940s. All of these materials have widely different applications, ranging from large-scale papermaking applications to high-end use in, for instance, the medical and electronic materials sector. The presentation will focus on the manufacture and applications of NFC in the commodity materials sector and is a personal account of the evolutionary patterns and challenges on the road to practical commercial applications. There have been extensive research and development activities in the field of nanofibrillar cellulose (CNF) materials during the past decades, although microfibrillated cellulose (MFC) was developed already during the late 1970s at ITT-Rayonier in USA. The developments, however, run to a stand still after ITT Rayonier abandoned their development efforts, but R&D was taken up in the late 80s and in the 90s by efforts in Japan (e.g. Daicel and Japanese scientists), who also became leaders of the current developments in the field of CNF materials, particularly in the areas of TEMPO-oxidation pre-treatments, but also in the area of composite applications and in a vast area of high end applications. The presentation will give a current perspective on nanocellulose developments. The hurdles to be alleviated in order to secure a successful commercialisation of these materials will be highlighted in the presentation.

Junichi Kurawaki
Kagoshima University, Japan
Title: Novel Synthesis of Gold-Chitosan Composite Nanoparticles Using Hg Lamp and Their Catalytic Activity for p-Nitrophenol Reduction

Biography: Junichi Kurawaki (born in Kagoshima, Japan,inMay 1957) received B.S. degree from Kagoshima University and M.S. degree from Kyushu University, Japan, in 1980 and 1982, respectively. In 1989, I have acquired PhD from Kyushu University. In 1984, I have been an assistant professor in College of Liberal Arts of Kagoshima University, Japan. In 1985, I have been a lecturer of Kagoshima University and then associate professor in 1989.Moreover, I have moved to Faculty of Science in Kagoshima University and have been professor in 2007. Since 2011, I have been a vice dean of this Faculty of Science and a head of Natural Science Center in Kagoshima University. ◇Affiliation society is in the following : The Chemical Society of Japan, The Society of Nano Science and Technology, The Japanese Photochemistry Association. ◇Research Field: Molecular spectroscopy, Nano material chemistry, Photochemistry, Colloidal chemistry

Abstract: Gold nanoparticles (AuNPs) exhibit many unique electronic, catalytic, optical, and other physical and chemical properties that their bulk counterparts do not have. AuNPs have been applied in many fields including photonics, micro-electronics, photocatalysis, lithography, and surface-enhanced vibrational spectroscopy. Chitosan is a polysaccharide composed of glucosamine and N-acetylglucosamine. Because of its bio-compatibility, chitosan has found emerging applications in biomedicine. In this study, we report a novel synthesis method of chitosan (Cht) supported gold nanocomposite particles (AuNP-Cht NC) using a simple Hg lamp irradiation. The aqueous solution of 1.0 mM HAuCl4 was ligand exchanged to HAu(OH)4 that raised to pH 7.0 with 4 mM of NaOH to prevent the dissolution of Cht. We confirmed to this ligand exchange by change of absorbance spectrum and the solution color turned from yellow to clear. The as-synthesized AuNP-Cht NC was characterized with UV-vis absorption spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) and the average size of AuNPs in AuNP-Cht NC could be determined to be 18.4±8.0 nm. Furthermore, it has been found that AuNP-Cht NCs effectively catalyze the reduction of p-nitrophenol to p-aminophenol in the presence of NaBH4 and this reduction reaction of the present systems follows the pseudo-first-order rate kinetics.

Paisan Kongkachuichay
Kasetsart University, Thailand
Title: Synthesis of Cu-Zn on graphene-based support for direct methanol synthesis from CO2 hydrogenation

Biography: Dr.Paisan Kongkachuichay is a Professor at the Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand. He obtained his B.Sc. in Chemical Engineering from Chulalongkorn University and M.S. and PhD in the same field from Texas A&M University, College Station, TX, USA. He is working on nanostructured catalysts for CO2 conversion and NOx reduction. He has published over 40 articles in high-rank journals.

Abstract: CO2, a major greenhouse gas, was converted to methanol via a direct hydrogenation using Cu-Zn metal loading on graphene-based support. The nitrogen-doped reduced graphene oxide (N-rGO) was prepared via the chemical exfoliation of graphite and using hydrazine as a reducing agent. The reduced graphene oxide aerogel (rGOae) was synthesized via hydrothermal reduction. The Cu-Zn on graphene-based supports were then synthesized via an incipient wetness impregnation and tested its performance for methanol synthesis from CO2 hydrogenation under the reaction conditions of 15 bar and 250 °C. The effect of bimetallic compounds Cu-Zn loading content was investigated. As a result, the 10 wt% Cu-Zn loading on N-rGO exhibited the highest space-time yield of methanol because it provides the highest surface area. Additionally, the effect of the H2 reduction time was investigated by in situ X-ray absorption near-edge spectroscopy (in situ XANES). It was found that the optimum reduction time of 90 min for a 350 °C-reduction achieved the highest space-time yield of methanol under the same reaction condition by using the 10%CuZn/N-rGO catalyst due to an almost completely reduced catalyst with low sintering. Moreover, it was found that N-rGO support can facilitate the dispersion of Cu-Zn metals. Especially, the nitrogen-doped atoms from the support can create polarity and facilitate the hydrogen dissociation, which can enhance the methanol synthesis from CO2 hydrogenation. Unfortunately, N-rGO can restack, attributing to the low surface area. In order to solve this problem, N-rGO will be modified to be a three-dimensional rGOae. The effects of the hydrothermal reduction temperature of rGOae support and Cu-Zn metal loading contents were investigated. Moreover, the role of each nitrogen by using different nitrogen sources (i.e., ammonia, hydrazine hydrate, and urea) doping to rGOae has been investigated. It was found that the hydrothermal reduction at 140 °C provided the highest surface area (458 m2 g−1), and 15wt%Cu-Zn/rGOae catalyst achieved the highest methanol production (94.53 mgMeOH gcat−1 h−1). Furthermore, 15%CuZn loaded on nitrogen doped graphene aerogel catalyst using urea as a precursor provided the highest space-time yield of methanol (405.49 mgMeOH gcat−1 h−1). It was found that the increase of pyridinic nitrogen can greatly promote the catalytic performance and enhance the methanol production.

A.S. Gouralnik
Institute of Automation & Control Processes FEB RAS, Vladivostok, Russia
Title: Growth of Mg2Si film of improved crystallinity on Silicon surface at 400 0C by ultra-fast deposition.

Biography: Alexander S. Gouralnik Born in 1952 in Samarkand (Uzbekistan). He Graduated in Leningrwd (now Sankt-Petersburg) State University, Physics Departement, during 1976. His Work experience during 1976 – 1979 is Artificial Intelligence Dpt., Lab. of 3D Microelectronics, Institute of Automation and Control Processes (IACP), Far – East Branch of the Russian Academy of Sciences (FEB RAS), Vladivostok, Russia, in 1979 – 1999 Lab. of Microstructure Controlled Growth, IACP FEB RAS and from 1999 – present is Laboratory of Optics & Electrophysics of Nanostructures IACP FEB RAS. Scientific interests : selective and controlled fabrication of preassigned nanostructures; UHV deposition, intermixiing and film formation processes, silicides, semiconductors, layered structures, optoelectronics, thermoelectrics nanomagnetism.

Abstract: Since the most cited works by Vantomme et al. [Phys. Rev. B, 64, 16965 (1996), Appl. Phys. Lett. 70, 1086 (1997)], it has been believed that growth of Mg2Si on Si at T > 200 0C is impossible since at such temperatures Mg re-evaporates from the surface without condensation. We analyzed the Mg concentration on the surface during the deposition process in terms of residence time before re-evaporation and found that the problem can be circumvented by radical increase of the Mg deposition rate [Gouralnik et al., Appl. Surf. Sci. 439, 282 (2018)]. Here we demonstrate growth of Mg2Si by ultra-fast deposition of Mg on Si at T ≈ 400 0C at the deposition rates of 100 – 1000 nm/second. The films have the very best crystal quality. Physics of the silicide film growth and analyses of the film growth kinetics are discussed. Perspectives of applications of such Mg2Si layers for significant improving of solar cell performance in IR region are considered.

Bondar Yuliia
Institute of Environmental Geochemistry, Ukraine,
Title: Development of nanocomposite adsorbents based on polymer fibers for selective removal of heavy metals and radionuclides from contaminated waters

Biography: Bondar Yuliia (04 January, 1961) is senior scientist of the State institution ”Institute of Environmental Geochemistry of the National academy of science of Ukraine” (IEG of NASU, Kyiv, Ukraine). She graduated from Department of Physical Chemistry of the National Taras Shevchenko University of Kyiv (Ukraine) and began to work in the Institute of Geochemistry, Mineralogy and Ore Formation of the NASU (Kiev, Ukraine). In 1994 she got PhD degree in Geochemistry and latter Senior Scientist ( degree. She carried out scientific work in Germany (2001, Philipps- Universitat (Marburg) , 2008 Institut für Geowissenschaften Technische Universität Bergakademie Freiberg ), and in S.Korea (2001, Dyeing technological center (Daegu), 2009, 2010 Yeungnam University (Gyeongsan)). Scientific interests: migration of heavy metals and radionuclides in the environment; radiation modification of polymer materials; synthesis of nanocomposite adsorbents based on modified polymer matrixes for sensing and selective removal of heavy metals and radionuclides from contaminated waters; liquid radioactive waste treatment.

Abstract: In the nuclear era, sustainable development of the fuel and energy complex is inseparably linked with the problem of radioactive waste management, with the study of behavior of radionuclides in the environment, as well as rehabilitation measures in the contaminated areas. Of particular relevance in solving the problems is the development and implementation of new sorption materials for selective extraction of radionuclides from contaminated natural and technological water. Dozens of different organic and inorganic adsorbents have been synthesized, studied and tested for selective removal of radionuclides, but only a few groups of the inorganic adsorbents, have shown constant and good performance. Unfortunately, these inorganic adsorbents are usually synthesized as fine particles, which cannot be directly employed in adsorption systems due to their quick agglomeration, compaction, loss of chemical activity, further difficulties in separation of the used adsorbent and purified solution, and even potential risk to ecosystems and human health caused by the possible release of nanoparticles into the environment. The last achievements in nanotechnology allow overcoming these technical bottlenecks through the synthesis of nanocomposite adsorbents by implantation of the preliminary synthesized inorganic fine particles into the porous solid matrixes (activated carbon, silica, cellulose, sands, polymers and etc.) or by in-situ synthesis of inorganic nanoparticels on the surface (or inside) of appropriate solid matrixes. Natural and synthetic polymer fibers are promising host solid matrixes for synthesis of nanocomposite adsorbents by in situ formation of inorganic nanoparticles on the fiber’s surface. Such composites are expected to combine the unique properties of nanoscaled inorganic particles (high speed of chemical reactions, selectivity) and technological properties of fibrous polymer matrix (flexibility, chemical stability, high specific surface, high hydraulic permeability, and etc.). In this study polypropylene (PP) and polyacrylonitrile (PAN) fibers have been chosen as host solid matrixes for the synthesis of nanocomposite adsorbents because of their low cost, good mechanical strength, chemical and thermal resistance of the polymer base, easy modification of the polymer surface. We developed the strategy of the fibers’ nanocomposite synthesis. It includes a two-stage experiment: chemical/or radiation-chemical modification of polymer surface (in order to anchor the appropriate functional groups on the fibers’ surface), followed by the in situ formation of inorganic nanoparticels using functional groups as nanoreactors. By selecting the nature of the anchored functional groups, the density of their distribution over the fibers’ surface, it is possible to create conditions for the in situ formation of inorganic nanoparticles, as well as to control their size and morphology, density of distribution. Two types of nanocomposite adsorbents based on PP and PAN fibers have been synthesized and tested for selective removal of radionuclides from multicomponent water solutions - potassium nickel hexacyanoferrate-loaded polymer fibers (for 137Cs radionuclides) and manganese dioxides-loaded polymer fibers (for 90Sr and uranium species). FT-IR-ATR, and X-ray diffraction techniques confirmed the formation of the inorganic phase on the polymer fibers’ surface. SEM study revealed that the inorganic phase is formed as nanodimensional aggregates which are rather regular in shape. The synthesized composite fibers were found to be stable in aggressive solutions for long time. They demonstrated fast adsorption kinetics, high adsorption capacity and rather high selectivity. The sorption experiments have shown Кd~ nx104 mg/l for sorption of 137Cs from the multicomponent model solutions with a high concentration of competitive ions (137Сs: (K+Na) ~ 1: nх109) by the nanocomposite adsorbents based on potassium nickel hexacyanoferrate-loaded polymer fibers; Кd ~ 1-3x103 mg/l for sorption of 90Cs from the multicomponent model solutions with a high concentration of competitive calcium and sodium ions (Са/Sr ~ 50/1) by the nanocomposite adsorbents based on manganese dioxide-loaded polymer fibers; Кd (~ nx102 – nx105 mg/l) for sorption of uranium species from the multicomponent model solutions (рН 3-4 and 6-7) by the nanocomposite adsorbents based on manganese dioxide-loaded polymer fibers.

Sohrab Hossain
Universiti Sains Malaysia, Malaysia
Title: Competitive heavy metal ions adsorption using magnetic chitosan-cellulose bio-nanocomposite

Biography: Dr. Md. Sohrab Hossain is currently working as a senior lecturer in School of Industrial Technology, UniversitiSains Malaysia (USM). Dr. Sohrab has obtained his PhD degree in Environmental Technology from UniversitiSains Malaysia. He has expertise in supercritical fluids technology. One of his core research area is the development of the physicochemical properties of bio-nanomaterials using supercritical fluids technology. Dr. Sohrab has published over 60 research articles in high impact indexed journals, patent, book chapters, and presentation at international conferences. He has developed a method in the area of sustainable solid waste management using super-critical fluid sterilization technology, which has worldwide recognized by the researchers. He has won several Gold and Silver Medals as the main and a Co-inventor in exhibitions at the national and international levels including the Malaysia Technology Expo 2014 (MTE-2014) and International Invention, Innovation and Technology Exhibition (ITEX-2013).

Abstract: Heavy metals pollution in the aquatic environment is one of the most serious environmental concerns because of their toxicity, bio-accumulating tendency, poses a threat to human life and the environment. Existing methods for removing metals from industrial effluents are including chemical precipitation, coagulation, solvent extraction, ion exchange, electrolysis, membrane separation and adsorption. Most of these methods suffer from the high capital and regeneration costs of the materials. Among these methods, adsorption is the most preferred method because it is convenient, producing nontoxic by-products and inscrutable to toxic contaminants. Researchers have recently focused on natural polymers such as cellulosic fibre and chitosan base derivative to serve as effective adsorbents to eliminate heavy metals from wastewater in a cost-effective and environmentally friendly manner. However, both cellulose and chitosan present notable disadvantages in heavy metal ion absorption, such as weak mechanical strength, poor chemical resistance, and high crystallinity, which have limited their uses as effective sorbents. To overcome these defects, magnetic chitosan nanoparticles- cellulosic nanofiber- Fe(III) (MCh-CNF-Fe) nanocompositeswere fabricated using cellulosic nanofiber as a reinforcing agent for chitosan nanoparticles, wherein the Fe3O4was utilized as a magnetite. Several analytical methods were utilizedutilized to determine magnetic, morphological, physicochemical and thermal properties of the prepared MCh-CNF-Fe nanocomposite. Subsequently, simultaneous heavy metal ions (i.e. Cr(VI), Cu(II) and Pb(II) ) removal from their tertiary aqueous solution will be conducted using MCh-CNF-Fe nanocomposite.

Nanostructured / nanoporous Materials and devices

Session Introduction

Hideya Kawasaki
Kansai University, Japan
Title: Low-temperature Sintering of Conductive Copper-based Ink for Flexible Electronics

Biography: Hideya KAWASAKI, Professor of the Department of Chemistry and Materials Engineering, Kansai University, received a Doctor degree (1996) in Science from Kyushu University. Since 1999, he worked as an assistant professor at Kyushu University. In 2006, he moved to be an associate professor at the Department of Chemistry and Materials Engineering, Kansai University, and he was promoted to a full professor in 2012. He received Awards for Younger Researchers from Division of Colloid and Surface Chemistry from the Chemical Society of Japan (2003) and the Mass Spectrometry Society of Japan (2011). His current research topics include the fabrication and characterization of colloidal metal nanoparticles/nanoclusters, as well their applications for electronics, sensing, catalysis, biomedical applications, and mass spectrometry. He has published more than 180 papers.

Abstract: Flexible electronics have recently drawn considerable attention due to their promising applications such as flexible display, radio-frequency identification (RFID), sensors for the Internet of Things (IoT), and wearable sensors for human healthcare. Conductive inks for printing conductive electrodes/patterns onto flexible substrates (i.e., printed electronics) is crucial to launch the new era of flexible electronics. The printed electronics allows the use of flexible substrates, which lowers production costs and enables fabrication of flexible electrode. Both organic and inorganic-based conductive inks are used for the printed electronics. Thus, conductive inks are key technology for the development of flexible electronics. Silver-based inks comprising of silver nanoparticles or silver complex have been developed due to high conductivity, low-temperature processes, and high stability. More recently, copper-based conductive ink is of great interest to the printed electronics industry because of their high bulk conductivity, low cost, and low migration tendency. The major issue with Cu-based inks is easy oxidation in ambient air; the presence of copper oxide raises the sintering temperature and dramatically increases the electrical resistivity. To overcome these limitations, our group focuses on low-temperature sintering of Cu-based inks to produce conductive Cu films on flexible polymer/paper substrates, ensuring the durability of sintered Cu films to safeguard their environmental stability and mechanical flexibility. These performances have become the most important task from a practical standpoint for flexible electronics. We have developed novel copper-based inks to allow low-temperature (<150 °C) sintering for the preparation of conductive Cu films: (i) nanoparticle-based inks with specific ligands[1,2,3,6], (ii) precursor-type inks (e.g., inks based on metal−organic decomposition, MOD)[4,5] and (iii) composite inks of micron-sized Cu particles with Cu nanoparticles or Cu complex [7,8]. In this presentation, we will mainly present a first attempt on air-atmosphere sintering of Cu -based inks at low temperatures [7,8].

Ge Wang
University of Science and Technology Beijing, China
Title: Carbon Support for Phase Change Materials

Biography: Ge Wang received her Ph.D. in Chemistry from the Michigan Technological University in 2002. Currently she is a professor and Ph.D. supervisor in the School of Material Science and Engineering at the University of Science and Technology Beijing. In 2012, she became a special chair professor endowed by the Chang Jiang Scholars Program of the Ministry of Education. Her research interests focus on creating complex materials structures with nanoscale precision using chemical approaches, and studying the functionalities including catalytic, energy storage and energy saving properties etc.

Abstract: Energy storage capacity and heat transfer ability are two important indexes of shape-stabilized phase change materials (ss-PCMs). Typically, porous materials can stabilize the PCMs by the surface tension action and capillary forces. However, supporting materials with high porosity usually lead to amorphous structures and low thermal conductivity, which is inadequate for meeting most power conversion targets. Thus, developing supporting materials with large encapsulation capacity and high thermal conductivity still remains a challenge. Recently, our group developed a one design many functions strategy to design 3D porous carbon support for phase change materials. For example, A novel CNT/mesoporous carbon support for phase change materials (PCMs) have been successfully synthesized by carbonizing a core-shell structured CNT/MOFs template. Porous carbon exhibits high porosity and a large specific surface area which is suitable for encapsulating PCMs. CNTs, acting as heat transfer pathways, constitute continuous channels for phonons transfer and realize rapid heat transformation from ss-PCMs to the outside. 3D conductive network carbon has been synthesized by employing direct-calcined CQDs-derived 3D porous carbon from the aldol reaction. Constructing 3D network succeeds in effective regulation of the channels by crosslinking reaction between DVB and acetone derivate, thus better loading macromolecule PEG and fully releasing crystallization behavior. Highly graphitized sp2-hybrid carbon nanosheets, obtained by direct pyrolysis, providing thermally conductive network and substantially improving thermal conductivity. These ss-PCMs exhibit excellent thermal conductivity and power capacity.

Philipp Zimmermann
Leibniz-Institut of Polymer Research Dresden e.V., Germany.
Title: Immobilisation of different nanoparticles on the surface of polymer parts during moulding

Biography: Philipp Zimmermann received his master’s degree in chemical engineering from the HTW Dresden-University of applied Science in 2015. Since then he is a scientific employee at Leibniz Institute of polymer research Dresden e.V. Together with Dr. Jürgen Nagel he works in the field of chemical functionalization of nanoparticles and their immobilization on polymer part surfaces during moulding.

Abstract: Nanoparticles and, particularly, nanoparticle aggregates exhibit some very interesting properties which may be used in advanced devices. Some examples are information storage, sensors, microfluidics, or switchable surfaces. For most of the applications, the nanoparticle structures have to be immobilized reliably on solid surfaces. As a way for immobilization, we followed an approach used for process-integrated surface modification of thermoplastic parts during injection molding. According to that, a layer of nanoparticles was prepared on a solid substrate. This was realized by adsorption from colloid solution, by spray-coating or other methods. Different types of nanoparticles and also microparticles were investigated, like gold, silica, polymers, and inorganic salts. The surfaces of the particles were chemically modified in advance. The layer was characterized by different spectroscopic and microscopic techniques. The particles were randomly distributed over the surface. In some cases chain-like aggregates were formed. The behavior of the layer in contact with the flowing melt was investigated. The substrates were mounted on the surface of a special prepared mould of an injection moulding machine, and the melt was injected. Finally, the surface of the part produced by injection molding was characterized. It was found, that the nanoparticles were organized in a thin layer on the polymer surface. They were not shifted by the flowing melt. No re-mixing with the flowing melt occurred. The distribution on the thermoplastic part surface was also randomly. Even aggregates from the substrate surface were reproduced. This may be a result of the fast cooling of the melt as it comes in contact with the mold. The process is analyzed by thermal simulation. The degree of embedding (see figure 1) depended on the size and surface properties of the particles. Thus, the embedding depth can be controlled. Some of the particle surface area was accessible for small molecules from solution. This was demonstrated by their catalytic activity in a redox reaction and by their adsorption behavior. Those embedded nanoparticle layers may be used in microfluidics or sensor applications. Moreover, the presentation gives an overview about surface modification effects of thermoplastic parts by embedding of different nanoparticles. The contribution addresses aspects of manipulation and engineering of nanoparticle systems under conservation of their typical properties. With the method introduced, the economic manufacture of parts with surfaces functionalized with nanoparticles becomes possible.

Chia-Hua Chan
National Central University, Taiwan
Title: High-Performance Perovskite Solar Cells Fabricated via Marangoni Effect

Biography: Chia-Hua Chan received his PhD from the Department of Chemical and Materials Engineering of National Central University, Taiwan. In 2006, he became a postdoctoral fellow at NCU to research fabricating photonic crystals by nanospheres. In 2010, he joined the Institute of Energy Engineering of NCU as an associate professor. His current research interests are using nanostructures to apply on LEDs and solar cells.

Abstract: In this study, we used Single-Step and anti-solvent methods to fabricate a MAPbI3-based perovskite solar cell. However, using the toluene as an anti-solvent will induce the "Marangoni effect" due to difference of the surface tension at the interface between the dripped solvent and the perovskite precursor. This effect will cause non-uniform distribution of the intermediate phase, which will form unexpected voids inside the perovskite layer leading to a low-quality perovskite film. Therefore, we introduce a simple delayed-annealing method to achieve a high quality and high-coverage perovskite layer, which can significant improve the non-uniform distribution of the intermediate phase. We use the SEM, XRD, AFM and EIS to observe and analyze the quality of perovskite films. In comparison with the control sample, the PCE will increase from 13.58% to 18.02% with the sample annealing at 100℃ for 40 min. Moreover, to replace the traditional toxic anti-solvent and realize a rapid process of forming a high-quality perovskite film, a low-toxic anti-solvent ethyl acetate was chosen to rapidly fabricate high-quality perovskite layers with the advantages of low surface tension and high evaporation rate. After using EA as the alternative anti-solvent, the highest PCE is 16.39% with dripping the ethyl acetate. Although the PCE is lower than using traditional toluene as the anti-solvent, it’s unnecessary treating with annealing process for 40 mins to suppress the Marangoni effect which has benefits to reduce the time and cost of fabricate the perovskite solar cells.

Xiaoyu Jia
Max Planck Institute for Polymer Research, Germany.
Title: Ionic permeability and interfacial doping of graphene on SiO2 measured with Terahertz photoconductivity measurements

Biography: Xiaoyu Jia was born in Shandong, China in 1993. He obtained his bachelor's degree (2015) in theoretical physics from the National Base of Talents in Physics, Shandong University, and master’s degree (2018) in condensed matter physics from State Key Laboratory of Surface Physics, Fudan University. Xiaoyu is currently working as a Ph.D. researcher focusing on Nanooptoelectronic materials, in the group led by Prof. Mischa Bonn at Max Planck Institute for Polymer Research (MPIP) in Mainz, Germany. He is a fellow of Graduate School of Excellence Materials Science in Mainz (MAINZ) since July 2018.

Abstract: Graphene has been extensively used as electrodes in various electrochemical applications, including lithium-ion batteries [1], dye-sensitized solar cells [2] and super-capacitors [3], thanks to its outstanding electrical and mechanical properties and superior chemical stability. Despite its relevance for these various applications, the effect of electrolyte solutions on the electronic properties, among which specifically the conductivity (σ) of graphene, and in return how graphene can sense the ions in the electrolyte, remain poorly understood. In a few available studies using graphene field effect transistors (FETs) for sensing various cations, conflicting results have been reported [4, 5, 6, 7, 8, 9]. Here employing optical pump-THz probe (OPTP) spectroscopy as a contact-free, all optical means, we investigate the impact of a series of cations with various solvation radius (based on chloride salt XCl, with X = Li+, Na+, K+, Ca2+) on the electronic properties. We demonstrate a strong pure electrostatic n-doping effect (over 200 meV) in graphene induced by metal cations in the electrolyte. Furthermore, we study the kinetics of the doping process: it takes 10’s of minutes to achieve full doping, and the doping time is critically depending on the solvation radius of ions with the trend of: K+ < Li+ < Na+ < Ca2+. Our results can be rationalized by assuming that the ionic doping process involves the permeation of cations through defects in graphene, and interfacial diffusion of cations between graphene and the supported substrate SiO2. This process is controlled by the interplay between the size, density of defects (atomic defects, pores, or grain boundaries), and the cation solvation radius. Our report presents not only a new tool to monitor the ionic dynamics at graphene and potentially other materials interfaces, but also offers new insight into graphene’s cation-sensing mechanism, and highlights the importance and impact of cation permeability though grapheme and the ion interfacial dynamics on the graphene’s electronic properties and thus its ionic sensibility.

Tatsuhiko Aizawa
Shibaura Institute of Technology, Japan
Title: Formation of two-phase nano-structured layer into AISI316 tools via plasma nitriding

Biography: Tatsuhiko Aizawa did his PhD in 1980 at University of Tokyo. During 1981-84 acted as Assistant Professor at University of Tokyo. And from 1985-95 he is an Associate Professor at ibid. From 1996-04 as a Professor at ibid. He acted as a Research Professor, University of Toronto and Professor at Shibaura Institute of Technology. From 2018 he is working as an Professor, Director, Surface Engineering Design Laboratory, Shibaura Institute of Technology, Japan. He wrote 15 Books; 550 Research Papers, 76 Patents

Abstract: Low temperature plasma nitriding had a potential to modify the austenitic stainless steel with the nano-structured surface layer. AISI316 stainless steel tool substrate was employed in the present study to demonstrate this possibility to change the authentic, coarse grained microstructure into the two-phase, fine grained surface layer with the average grain size less than 100 nm. First, a mirror-polished AISI316 substrate was plasma nitrided at 673 K for 14.4 ks by 70 Pa; the modified surface layer thickness reached to 60 mm. XRD analysis proved that no chromium and iron nitrided were synthesized as a precipitate in matrix by this nitriding. SEM-EDX was utilized to describe the cross-sectional microstructure from the surface across the nitriding front end to the depth of matrix. Nitrogen content is preserved to be constant by 5 mass % in the nitrided layer. Inverse pole figure mapping by EBSD analysis proves that this nitrided layer has homogeneous nano-structure with fine grain size less than 100 nm and large misorientation angles. Phase mapping showed that this layer turned to be -’-phase with the volume fraction of a’ more than 70 %. Micro-Vickers hardness testing revealed that this layer had higher hardness than 1400 HV in average. This two-phase nano-structuring was preferable to the usage of AISI316 substrate as a die and mold material for stamping and injection molding

Yuan-Liang Zhong
Chung Yuan Christian University, Taiwan
Title: Electron Transport Behavior in Two-dimensional MoS2 Field Effect Transistors

Biography: Yuan-Liang Zhong have completed Ph.D. in Physics at National Tsing Hua University, Taiwan (R.O.C) (2002), He did his Postdoctoral Fellow, Institute of Physics, Academia Sinica, Taiwan (2003~2004) Postdoctoral Fellow, NTT Basic Research Laboratories, Japan (2004~2006), Adjunct Researcher, NTT Basic Research Laboratories, Japan (2006~2007) and Postdoctoral Fellow, Department of Applied Physics, Tokyo University of Science, Japan (2006~2007) and at present he is an Assistant Professor, Department of Physics, Chung Yuan Christian University, Taiwan (2007~2019.7)

Abstract: Semiconducting transition-metal dichalcogenides, MoS2, is a novel material as a channel material of field-effect transistors (FETs). Monolayer MoS2 of 2D materials contains a 2DEG in an atomic layer as a FET ultrathin channel. We synthesized the triangular MoS2 through a chemical vapor deposition method [1] and fabricated the MoS2 FET with back and side gates on silicon-dioxide substrate. Triangular MoS2 FET was applied by different direct electric fields (in-plane and out plane) for measuring current-voltage curves to study the characteristic of devices and the electron transport mobility μ. The temperature dependence of mobility follows a μ ~ T-γ with γ = 1.62 and 1.73 for side and back gate be consistent with theoretical predictions at closed to room temperature, above approximately 175 K. When the temperature was lower than approximately 175 K, we successfully explained the decreasing mobility behavior by using the Wigner crystal phase.1 We also discovered the temperature independence of ripplon-limited mobility behavior at lower temperatures in gain boundary channel. [1] The triangular MoS2 was also observed that conductivity can be actively modulated by the piezoelectric charge polarization-induced built-in electric field under strain variation.2 Our results provide evidence for strain-gating monolayer MoS2 piezoelectric FET by an AFM tip as gate with mechanical load. [2] Further, we also fabricated multi-level nonvolatile molecular memory based on nanochannel MoS2 FET, [3] and fin FET stacked triangular monolayer MoS2 for 3D complementary FET. [3]

Vesna Middelkoop
Flemish Institute for Technological Research - VITO, Belgium
Title: 3D printed nanoparticle-bearing catalyst and adsorbent systems

Biography: We develop innovative 3D printing technologies to tailor the macro-, microstructure and distribution in functional material systems, as a means of controllable deposition of nanoparticle precursor onto support materials. The systems are optimised to directly print and pattern a variety of 3D printed architectures in ceramic, metal and hybrid nanomaterials (e.g. multi-component metal oxides, nanocomposite active catalyst, adsorbent particles into carbon, Al2O3, SiO2 supports within polymer matrix). The technology has shown greatly improved adaptability in terms of functionality and design compared to the conventional randomly packed beds such as powders and granules. Further work is being carried out to develop a series of bespoke components for highly flexible monolithic/multi-channel reactor systems for a wide range of chemistry and energy applications. The model reactor systems that will be showcased are innovatively employed in industrially relevant chemical reactions. An example of this, a monolithic multi-channel system, has been developed using co-printed carbon-supported nanoparticle Pd catalyst to improve organic chemical synthesis. Another system under study is based on graphene-oxide (GO) based 3D structured mixed oxide catalysts that were produced using a green, rapid, chemical synthesis route combining the unique properties of graphene and active nanocomposite particles for CO2 utilisation reactions. In addition to online product analysis, a combination of conventional characterisation and advanced 3D imaging in situ techniques at multiple resolutions were used, such as fast new XRD-CT tools allowing for chemistry and physical form to be investigated under preparation and operando conditions. Pertinent morphological and chemical information on the nanoparticles and support material can be fed back into the further development of the 3D printed geometries.

Abstract: We develop innovative 3D printing technologies to tailor the macro-, microstructure and distribution in functional material systems, as a means of controllable deposition of nanoparticle precursor onto support materials. The systems are optimised to directly print and pattern a variety of 3D printed architectures in ceramic, metal and hybrid nanomaterials (e.g. multi-component metal oxides, nanocomposite active catalyst, adsorbent particles into carbon, Al2O3, SiO2 supports within polymer matrix). The technology has shown greatly improved adaptability in terms of functionality and design compared to the conventional randomly packed beds such as powders and granules. Further work is being carried out to develop a series of bespoke components for highly flexible monolithic/multi-channel reactor systems for a wide range of chemistry and energy applications. The model reactor systems that will be showcased are innovatively employed in industrially relevant chemical reactions. An example of this, a monolithic multi-channel system, has been developed using co-printed carbon-supported nanoparticle Pd catalyst to improve organic chemical synthesis. Another system under study is based on graphene-oxide (GO) based 3D structured mixed oxide catalysts that were produced using a green, rapid, chemical synthesis route combining the unique properties of graphene and active nanocomposite particles for CO2 utilisation reactions. In addition to online product analysis, a combination of conventional characterisation and advanced 3D imaging in situ techniques at multiple resolutions were used, such as fast new XRD-CT tools allowing for chemistry and physical form to be investigated under preparation and operando conditions. Pertinent morphological and chemical information on the nanoparticles and support material can be fed back into the further development of the 3D printed geometries.

Peiqing La
College of Materials Science and Engineering, Lanzhou University of Technology, China
Title: Nanostructured stainless and carbon steels with super strength and good ductility

Biography: Peiqing La is a Professor at State Key Lab of Advanced processing for Non-Ferrous materials, Lanzhou University of Technology, China

Abstract: The 304 and 316L stainless steels and 1020 and 1045 carbon steels with nano/micro-crystalline structure were prepared by an aluminothermic reaction casting method. The microstructural evolution of the stainless steel after annealed with different time and temperature, rolled with different thickness reduction and temperature, first cogged and followed rolled with different thickness reduction and temperature were studied. The microstructural evolution of the carbon steel after annealed with different time and temperature, rolled with different thickness reduction at 600°C. By analysis the grain size of nanocrystalline austenite, submicrocrystalline austenite and ferrite, and their volume fraction in stainless steels; the volume fraction and lamellar spacing of the pearlite, the shape of the cementite in pearlite in carbon steels. We raised the mechanisms of microstructure evolution.

Daniela. Ion-Ebrasu
National Institute for Cyogenics and Isotopic Technologies ICSI-Rm. Valcea, Romania
Title: Composite Graphene Modified Anion-Exchange Membranes for Alkaline Electrolysis

Biography: Ph.D. Daniela Ion-Ebrasu is leading the lab for energy storage technologies based on hydrogen within National Institute for Cyogenics and Isotopic Technologies ICSI-Rm. Valcea, Romania. Her focus is towards PEM fuel cells, water and alkaline electrolysis development, a special accent being put on materials improvement and architectural design (membranes, catalysts and gas diffusion layers). Dr. Ion-Ebrasu is the first author and co-author of over 50 publications in scientific journals of which about 15 are covered by Web of Science, 3 book chapters and three Romanian patents. She received 3 Gold Medals and is member of several Romanian and international associations.

Abstract: Anion Exchange Membrane Water Electrolysis (AEMWE) is expected to lead to a major breakthrough among current water electrolysis technologies, by combining the performance of Proton Exchange Membrane Water Electrolysis (PEMWE) with the less corrosive environment and the robustness of Alkaline Water Electrolysis (AWE). One of major current technical challenges in AEM is low OH- conductivity and thermal stability. Nowadays, graphene is considered one of the most promising candidates for improving the ionic transport properties, isotopic selectivity and conductivity throughout the unique two-dimensional structure. In this paper, we report on the development of graphene composite membranes in comparison with commercial FUMASEP® FAA-3-20, FUMASEP® FAA-3-30 membranes from Fumatech. Commercial graphene was incorporated into the Fumion® solution FAA-3 in NMP (10%), and fabricated by doctor-blade method. The nanocomposite membrane was dried for 24 hours at room temperature under nitrogen controlled atmosphere, and compared with a membrane prepared in the same condition using the ionomer solution. The effects of graphene filler incorporation was studied by ATR-FTIR, TGA, FE-SEM, DMA, water uptake, IEC, broadband dielectric spectroscopy (BDS) and four-points in plane impedance spectroscopy to assess the commercial and graphene-composite AEMs. From the BDS measurements it was noticed that the macroscopic transport quantities (dc conductivity and characteristic frequency rate) for the Fumion® solution membrane are lower by about one decades compared to the FUMASEP® FAA-3-30 membrane. On the other hand, an enhancement of dc conductivity by 7 decades is observed for graphene nanocomposite membrane compared to the one without graphene. The membranes behaviour was investigated under ´real´ electrolyser conditions, by using an in-house 10 cm2 electrolysis cell.

Péricles Lopes Sant’Ana
State University of Sao Paulo, UNESP. Brazil
Title: Analysis of Hydrogenated-carbon (a-C;H) films deposited by Plasma Immersion Ion Implantation on component engines for Automotive Industry

Biography: Péricles Lopes Sant’Ana is Production Engineering (Federal University of Viçosa, Minas Gerais State, Brazil – 2007), Master and Doctor in Materials Science and Technology (State University of Sao Paulo, Brazil). He has 10 years in Research and Development, working with Plasma Surface Treatment and Thin Films Deposition for Automotive industry, Food Packaging and sensors & Devices. Recently he developed hydrogenated-carbon films using Plasma Immersion Ion Implantation, reaching good surface properties combination of adhesion, Roughness, Hardness and friction coefficient, in which are useful for Tribology and automotive industry.

Abstract: The good specific mechanical and tribological properties of hydrogenated-carbon films (a-C:H) have be useful for engine components for automotive industry. However, their use is limited depending on the poor adhesion character to alloy substrates. The major concerning of using DLC layers on engine parts are: (i) to reduce friction; (ii) to increase fuel efficiency and to reduce CO2 emission; (iii) to increase hardness of alloy steel. After polished and ultrasonicated, 16MnCr5 and glass substrates were submitted to PIIID procedures in radiofrequency plasmas (13.56 MHz) generated from atmospheres of methane and argon. Excitation power and total gas pressure were kept constant. It was investigated the effect of methane proportion on the microstructure and mechanical properties of the films using the follow techniques: Raman Spectroscopy (for Hydrogen content and microstructure analysis), Ultra Micro-Tribometer (for friction coefficient) and Nanoindentation (hardness evaluation). Raman analysis confirmed the character as hydrogenated-carbon (a-C:H) of the films growth, and the proportion of 80% methane and 20% argon resulted to the best performance of mechanical properties of the films owing to the increase of hardness in until ten times, and reducing the friction coefficient to about 0.2.