26th International Conference on Advanced Materials, Nanotechnology and Engineering June 22-23, 2020 Brisbane, Australia

Biography:

Dr. Adewale Giwa is a researcher at Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates. He has co-authored over 50 publications and reviewed scientific articles for many journals.

Abstract:

Activated carbon was prepared from date palm leaves, modified with mussel-inspired polydopamine and cationic polyethylenimine by dip coating, and employed for the sorption/dispersion of crude oil in simulated seawater. The activated carbon was prepared from ZnCl2 activating agent using two impregnation ratios, i.e. 1:2 and 1:4. The pristine (unmodified activated carbon) prepared from 1:4 impregnation ratio showed the highest crude oil sorption efficiency of 53% but no crude oil dispersion. Modification of the activated carbon with 10% PDA/PEI increased the dispersion efficiency to 61% while still achieving a sorption efficiency of 30%. The dual sorption-dispersion property of this activated carbon was achieved through the abundant nucleophilic N-H chains in the modifier, which altered the morphology and pore structure of the activated carbon, improved its amphiphilicity, and ensured covalent C-N linkages with the activated carbon. However, a further increase in the % of the modifier from 10% to 20% resulted in a decrease in both sorption and dispersion efficiencies due to salting-in effect. Samples were characterized using Environmental Scanning Electron microscopy, Raman Spectroscopy, Infra-Red IR Attenuated Total Reflectance (ATR) spectra analysis, and Energy Dispersive X-Ray Spectroscopy. The modified activated carbon showed better sorption/dispersion characteristics compared to a commercial activated carbon. This study presents the potential for the formation of pickering emulsions of crude oil in saline water using activated carbon derived from date palm waste.

Biography:

Dr. Adewale Giwa is a researcher at Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates. He has co-authored over 50 publications and reviewed scientific articles for many journals.

Abstract:

Activated carbon was prepared from date palm leaves, modified with mussel-inspired polydopamine and cationic polyethylenimine by dip coating, and employed for the sorption/dispersion of crude oil in simulated seawater. The activated carbon was prepared from ZnCl2 activating agent using two impregnation ratios, i.e. 1:2 and 1:4. The pristine (unmodified activated carbon) prepared from 1:4 impregnation ratio showed the highest crude oil sorption efficiency of 53% but no crude oil dispersion. Modification of the activated carbon with 10% PDA/PEI increased the dispersion efficiency to 61% while still achieving a sorption efficiency of 30%. The dual sorption-dispersion property of this activated carbon was achieved through the abundant nucleophilic N-H chains in the modifier, which altered the morphology and pore structure of the activated carbon, improved its amphiphilicity, and ensured covalent C-N linkages with the activated carbon. However, a further increase in the % of the modifier from 10% to 20% resulted in a decrease in both sorption and dispersion efficiencies due to salting-in effect. Samples were characterized using Environmental Scanning Electron microscopy, Raman Spectroscopy, Infra-Red IR Attenuated Total Reflectance (ATR) spectra analysis, and Energy Dispersive X-Ray Spectroscopy. The modified activated carbon showed better sorption/dispersion characteristics compared to a commercial activated carbon. This study presents the potential for the formation of pickering emulsions of crude oil in saline water using activated carbon derived from date palm waste.

Biography:

Dr.FatemehShamekhi has her expertise in encapsulation methods and optimization techniques of coating components for oral drug delivery. She had her specific focus on nanostructures and their characterization methods as well as their behavior through simulated gastrointestinal tract condition (in vitro models).

She has extensive experience in the academic field which extends to more than 10 years.She is currently a Lecturer at Azad University. She earned her Ph.D. degree in Nano-biotechnology from TarbiatModares University in 2018. Her master degree was in Enzyme Biotechnology from University Putra Malaysia. She published many peer-reviewed papers in Scopus indexed journals with impact factor as well as conference papers.

Abstract:

Increasing prevalence, variable pathogenesis and natural history of progressive type II diabetes, highlight the necessity of immediate development of new therapeutic strategies Glucagon-like peptide-1 receptor agonists are a new class of injectable antidiabetic drugs. Chitosan coated calcium-alginate nanocapsules were developed for oral sustained delivery of liraglutide, a long-acting analog of glucagon like peptid-1. The aim of such drug delivery system is to recover diabetic patient compliance which otherwise demands prolonged repeatedly injections. The effect of coating components including sodium alginate, calcium chloride and chitosan concentrations on the particle size was studied based on response surface methodology. The beads were characterized through dynamic light scattering (DLS), scanning and transmission electron microscopy (SEM and TEM) as well as fourier transform infrared spectroscopy (FTIR). It was shown that the diameter of the formed beads was most dependent on the encapsulation technique and alginate concentration. SEM revealed spherical and smooth particles of up to 100 nm diameter for optimum composition of alginate 0.5%, chitosan 0.5% and calcium chloride 0.5% in the ratio of 3:1:1. The resulting bead formulation had a loading efficiency of 92.5% and loading capacity of 54.16 %. In-vitro release studies in simulated gastrointestinal conditions were carried out in a sequential technique and the amount of drug release was found to be 39.1% after 8 hours. The MTT results of developed nanocarrier revealed up to 52.05% viability enhancement compared to free drug in 0.3 mg concentration. The results of this study demonstrated that chitosan coated calcium-alginate nanoparticles hold promise as a potential natural biodegradable polymer-based oral carrier of liraglutide for better management of diabetes. 

Biography:

Dr. Jyothilakshmi. R, is currently working as Asst. Professor in the Department of Mechanical Engineering, M. S. Ramaiah Institute of Technology, Bangalore. She has completed her BE in  Industrial and Production Engg, PESCE, Mandya, Mysore University. Completed her M.Tech Degree in Production Engineering Systems Technology from National Institute of Engineering, Mysore, Visvesvaraya Technological University, Karnataka with first rank and Gold Medal.

Abstract:

Cellulose is a biopolymer found in plant cell walls that can be derived from biomass sources such as sugarcane. It is one of the major constituents of plant cell walls along with hemicelluloses and lignin. Cellulose is composed of long unbranched fibers of glucose held together by hydrogen bonds. It is widely used in paper, plastics, coatings & casings mostly due to it’s film making capabilities. The current work employed alkaline extraction followed by acid hydrolysis method to extract nano-cellulose from sugarcane bagasse. This research project focused on extraction of the polymer from a suitable source and preparation of films with mechanical integrity and desirable chemical properties. Reinforcement of said films with nano-fillers like nano-silica and clay were carried out to enhance their mechanical properties. Further development on these films would contribute to eliminating plastics and replacing them with better and sustainable materials.

The composites were cast, characterized and tested for their tensile strengths to determine their Modulus of Elasticity and were compared with each other.

Biography:

A.K.M.Kafi has completed his PhD at the age of 29 years from Dong-A University and postdoctoral studies from The University of Tokyo and the university of Sydney. He has published more than 40 papers in reputed journals.

Abstract:

A novel amperometric H2O2 biosensor based on immobilization of Hemoglobin with MPNFs of SnO2 and Au nanoparticle (Au NP) onto glassy carbon electrode with chitosan have been proposed in this work. Multiporous nanofibers of SnO2 were synthesized by electrospinning method from the tin precursor by controlling the concentration. Hb was then co-immobilized with the SnO2 and Au NP nanofibers on the surface of glassy carbon electrode by using chitosan. The MPNFs of SnO2 play a significant role in facilitating the electron exchange between the electroactive center of catalase and the electrode surface. Cyclic Voltammetry and amperometry were used to study and optimize the performance of the fabricated H2O2 biosensor. The AuNP/SnO2-MPNFs/Hb/Ch/GCE biosensor displayed a linear amperometric response towards the H2O2 concentration range from 1 to 120 M with a detection limit of 0.05 M (based on S/N=3). Furthermore, the biosensor reported in this work exhibited acceptable stability, reproducibility, and repeatability.

Biography:

Dr Neil Fellows is a Reader in the Engineering in the School of Engineering, Computing and Dr Neil Fellows is a Reader at Oxford Brookes University and is lead for the Materials, Mechanics and Design research group. Neil carried out his PhD at Cranfield University investigating the behaviour of ceramic armours subjected to high velocity impact prior to taking up a Research Assistant position at the University of Oxford investigating the high strain rate deformation of Remco Iron. Neil then obtained a lectureship at Oxford Brookes University. Neil’s key research interest is the performance of composite materials and structures subjected to static and dynamic loading. Neil has over 35 journal publications.

Abstract:

Metal matrix composite (MMC) materials can provide very desirable material and component properties. MMCs can be divided into those that are reinforced by long continuous fibres (such as carbon, alumina, silicon, boron and carbide) or those reinforced by discontinuous fibres (particulates). The addition of fibres and particulates enables the property of the base metal (matrix) to be enhanced. The strength properties of MMC’s are known to be heavily influenced by the manufacturing process, caused by changes in the matrix microstructure and through the introduction of residual stresses. It is very difficult to measure the residual stresses within MMCs which leads to uncertainty in terms of the prediction of those stresses. To overcome these issues an indirect method to predict the residual stresses, through matching numerical and experimental curvature, is presented in this paper. The MMC chosen for investigation is Aluminium 6061 reinforced with silicon carbide long fibres. The numerical models presented are for an aluminium plate with internal layers of silicon fibre that have been arranged in 0°/90° or +55°/-55° directions, such that the plates are non-symmetrical about the midline. The numerical models take into account the material property changes due to creep and thermal loading.  To test the numerical models ability to predict curvature, aluminium plates were manufactured to the same specifications using the same manufacturing process conditions as used in the models. The curvatures between the models and manufactured plates showed good correlation, giving confidence in the models ability to predict the residual stresses for more complex components

Biography:

Jyoti Jain is an active researcher of the field, fiber reinforced composites. She has done her B.tech in Food Technology from SHUATS, formerly Allahabad Agricultural Institute, in 2012, M.Tech Chemical Engineering from MNIT Jaipur in 2014 and currently pursuing her Ph.D. from Indian Institute of Technology Roorkee, India. She has currently over 18 publications in reputed International and National journals and conferences. She also has an active membership of the Institution of Engineers (IE) and IIChE. She is an active reviewer of world class esteemed journals like Journal of Applied Polymer Science, Food Research International, Polymer and Polymer Composites.
 

Abstract:

In recent years, researchers are taking much interest in natural fibers because of their low weight, low cost, biodegradability, and sustainability to the environment. The substitution of synthetic fibers with natural plant based fibers has been taken a keen interest in various applications in automobile, construction, aerospace, and sports industry. There are various types of plant origin fibers, for instance, coir, pineapple, banana, sisal, wheat straw, bagasse, etc. Various combinations of these natural fibers with different thermosetting, thermoplastic, and biodegradable polymers were developed and characterized for their different properties for specific application. Among all these fibers, the highest cellulose content is observed in pineapple leaf fibers, i.e. 70-80%. In this research paper, pineapple leaf fibers were used to reinforce with epoxy resin before and after surface treatment with alkali. Thermal conductivity of these composites were analysed for their automobile and electrical applications where thermal insulation or poor conductivity is required. Thermal conductivity of composites decreases with the increase in fiber content in the composites because of the poor conductivity of natural fibers in compared to epoxy polymer. So, with the increase in the concentration of natural fibers, it starts decreasing. The same factor applies true for alkali concentration, with the increase in alkali concentration, the hemicellulose and lignin content of natural fibers decreased or totally removed, which results in further more concentration of cellulosic material in composites which again helps in poor conductivity of composites. Scanning Electron Microscope of these composites shows the better compatibility after mercerization process.

Biography:

Mr.Ibrahim Kandil is a Civil Engineer consultant, BSc. 1977, Alexandria university, Egypt. He has+30 years of extensive experience in structural engineering & Soil mechanics with all its applications. worked as an executive director and consultant for large and diverse projects in Egypt & Gulf region, has engineering studies in buildings restoration and maintenance. has +300 Courses "CEUs" From :AIA, ACI, PCA, ASTM, USGBC, AISC, McGraw Hill Constr., CED Inc., WP council, BD+C university, NFBA, Gr. Builder College, NIBS, Green CE Inc., RON BLANK &Associates Inc., BUILDER College, WBDG. And Civil Engineer Consultant ( Saudi council of engineers ).

Abstract:

We aim to reach concrete structures (low to medium rise) resist external environmental factors (hot climates - humidity - coastal environment - earthquake - frost areas - noisy areas- industrial areas - weather fluctuation - stormy areas.. etc), characterized by high fire resistance (externally and internally), achieves higher structural balance rates, higher sustainability rates & higher durability with longer life than counterparts. All of that achieved by using lightweight high performance structural concrete with totally environmentally friendly materials that donot involve any harmful substances, we called it :(KanCrete) it is the concrete of the future because, with all these features we do not use any (unconventional) materials, as they are composed of (coarse &  fine aggregates) and (ordinary or resistive cement) have the same composition proportions as any conventional concrete, but with the addition of some elements to get all of these advantages, Without a significant increase in cost. (KanCrete) density = (1600 to 1850 kg / m3), reducing 25 % to 35% of conventional concrete weight, Compressive strength = 423 to 523 kg/cm2, with 40% to 75% more than conventional concrete, Heat gain %age = 2.47% to 2.58%, with heat transfer resistance 25 times of insulated conventional concrete, Not permeable to liquids and harmful substances & Chemically balanced in the face of harmful environments. we obtain fully structural system integral components and members, with full distribution of loads in various loading states, high stable & tough structure system.

Biography:

My name is Kebena Gebeyehu Motora. I have studied Bachelor of Science in Chemistry at Jigjiga University from 2008–2011 and graduated on 2nd July, 2011. I have studied my Masters in Jimma University from Sep 2011 to Nov 2013 and graduated by masters of Science in Analytical Chemistry. After graduation I was employed at Mettu University and I have been working there as a lecturer and researcher until September 2017.  Starting from September 2017, I am studying my Ph. D at National Taiwan University of Science and Technology and I will graduate this year.

Abstract:

Full-spectrum light-driven Ag₃VO₄/WO_2.72 nanocomposites were prepared using a simple precipitation method. The nanocomposites were characterized via X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FE-SEM), ultraviolet-visible (UV-Vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), photoluminescence (PL) spectroscopy, Brunauer-Emmett-Teller (BET) analysis, and electrochemical impedance spectroscopy (EIS). The photocatalytic performance of the nanocomposites for the photodegradation of methylene blue (MB) and Rhodamine B (Rh B) were examined. The Ag₃VO₄/WO_2.72 nanocomposites exhibited outstanding photocatalytic performance for the photodegradation of Rh B and MB, and they were stable under irradiation with UV, visible, near-infrared (NIR), and solar light. A nanocomposite prepared with Ag₃VO₄ and WO_2.72 in a 1:2 molar ratio (AgV-WO-2) exhibited particularly high photodegradation efficiency. AgV-WO-2 photodegraded 99% of the Rh B and 98% of the MB in aqueous solutions under solar and visible light. Under UV light, 96% of the Rh B and 89% of the MB were degraded, while 40% of the Rh B and 38% of the MB in solutions irradiated with NIR light were removed. The photocatalytic performance of the nanocomposites for the photoreduction of chromium (VI) was also studied. AgV-WO-2 exhibited a photoreduction efficiency of 90% under solar light irradiation. The activities of the AgV-WO-2 nanocomposite for the photodegradation of Rh B and the photoreduction of Cr (VI) were compared to those reported for other catalysts. The photocatalytic activity of the Ag₃VO₄/WO_2.72 nanocomposite was better. It is thus a promising photocatalyst for the removal of Rh B, MB, and chromium (VI).

Biography:

Yoganandan Govindaraj has completed his PhD from National Institute of Technology-Calicut in year 2017 and currently doing post doctoral programme in Indian Institute of Technology-Bombay. He has about 11 papers in reputed journals and a patent (PCT) filled in US and EPO as credit for his research interest. His research interest includes electrochemistry, materials chemistry, surface modification for metals and non metals, Corrosion etc.

Abstract:

Polyaniline (PANI) was electrochemically deposited on mild steel substrate. Autogeneous transition in physical and chemical structure in nanometer scale showed anomalous ehaviour in the wettability of the surface. Surface morphology showed the formation of nano dentritic structure on naturally aged PANI coated surface. Spontaneous changes in the backbone of the polymer was also observed due to oxidation. Electrochemical impedance spectroscopy results exhibited a continuous increase in resistance of the PANI layer due to self-oxidation. Surface topography of naturally aged PANI surface was more smooth and homogeneous as compared to that of as pereaed condition. Water contact angle measurement using different liquids showed the surface energy of PANI has decreased >70% after 30 days of exposure in the ambient environment. A gradual increase in water contact angle of >150⁰ on electropolymerized PANI surface was observed over the period indicated superhydrophobic surface. A self-assembled ono layer formation was explained with the help of SEM, FT-IR, Raman, XPS and contact angle measurements. The findings are explained based on the cassie-Baxster mechanism of micro-nano-cluster formation over PANI surface during continuous exposure.

Biography:

Dr. Ioana Cozmuta is Co-Founder aned CEO of G-Space Inc, a women-owned business focused on the development of new materials by liberating the potential design space from the limiting effects of the gravitational force. Dr. Cozmuta’s is based on a nineteen years career in academia, at NASA and in the start-up world. She holds a Ph.D. in Applied Physics from the University of Groningen, the Netherlands and post-doctoral specializations in computational chemistry and material design from the California Institute of Technology respectively Genomics and Biotechnology from Stanford University.

Abstract:

Materials power key technological breakthroughs in foundational industries  (communications, consumer electronics, aerospace, automotive, energy, etc) of the 21^st century, rapidly approaching the limits of Moore's law for processor speed and capacity, bandwidth of traditional silica fibers. At the same time, advances in areas such as quantum computing, AI, and IoT will require new materials with performance envelopes beyond traditional limits - lighter, cheaper, more powerful. The era of digital transformation demands dramatic performance improvements in data transmission (petabytes/s/km) and storage (zetta-bytes), sensing (sensitivity, resolution, response time, dynamic range) and mechanical flexibility, requiring novel advanced engineered materials. Estimates of the industrial impact of Advanced Materials innovations over the next decade exceed $3 Trillion. There exists a body of past evidence showing that there are chemical formulations and areas in the phase diagrams of known materials that are unstable under the effect of body forces such as gravity. G-Space is a terrestrial AI platform for rapid prototyping and commercialization of gravity-independent new materials. At G-Space, the gravitational force is turned into a design parameter that unlocks areas of the phase diagram inaccessible otherwise. G-Space sees this demand for novel materials as an incredible commercial opportunity that also positively shapes the society.

Biography:

Chunyuan Lu received his Master’s degree from Pusan National University in 2015. He is currently a PhD student under the supervision of Prof. Hwan Kyu Kim in the department of advanced materials chemistry at Korea University. His current research interests include the design and synthesis of organic semiconductors, device fabrication of perovskite and dye-sensitized solar cells.

Abstract:

Three phenothiazine-based A−π–D−π–D−π–A-type small molecules containing various terminal acceptor units, which act as Lewis base blocks, have been synthesized via an efficient and step-economical, direct C–H arylation strategy in the aim toward the development of hole-transporting materials (HTMs) with multifunctional features (such as efficient hole extraction layer, trap passivation layer, and hydrophobic protective layer) for perovskite solar cells (PrSCs). Optical-electrochemical correlation and density functional theory studies reveal that dicyanovinylene acceptor in SGT-421 downshifted the highest occupied molecular orbital (HOMO) level (−5.41 eV), which is more proximal to the valence band (−5.43 eV) of the perovskite, whereas N-methyl rhodanine in SGT-420 and 1,3-indanedione (IND) in SGT-422 destabilized the HOMO, leading to an increased interfacial energy-level offset. SGT-421 exhibits superior properties in terms of a sufficiently low-lying HOMO level and favorable energy-level alignment, intrinsic hole mobility, interfacial hole transfer, hydrophobicity, and trap passivation ability over spiro-OMeTAD as a benchmark small-molecule HTM. As envisaged in the design concept, SGT-421-based PrSC not only yields a comparable efficiency of 17.3% to the state-of-art of spiro-OMeTAD (18%), but also demonstrates the enhanced long-term stability compared to the spiro-OMeTAD because of its multifunctional features. More importantly, the synthetic cost of SGT-421 is estimated to be 2.15 times lower than that of spiro-OMeTAD. The proposed design strategy and the study of acceptor–property relationship of HTMs would provide valuable insights into and guidelines for the development of new low-cost and efficient multifunctional HTMs toward the realization of efficient and long-term stable PrSCs.

Biography:

Mr.Israa Medlej has completed her PhD at the age of 26 years from Messina University, Italy in collaboration with Lebanese University. For her Ph.D. studies she also received a scholarship sponsored by the University of Santiago de Compostela, Spain (Erasmus Project). Her main expertise includes magnetism, spintronics, and the implementation of experimental techniques for the characterization of magnetic microparticles. Israa also received a scholarship in 2016 sponsored by the University of Lorraine, Saint Avold (France) to do her internship of Matser 2 in Condensed Matter Physics. She has published papers in reputed journals

Abstract:

Magnetic skyrmion are topologically protected [1],[2] non-uniform configuration of the magnetization which can behave as particles [3]. They can be easily manipulated (nucleated, shifted and detected) by spin-polarized current, and for this reason they offer a wide range of applicability fields [2]. In this work, we study the skyrmion dynamics driven by the spin-Hall effect in a synthetic antiferromagnet within a micromagnetic framework. We show that, in presence of thermal fluctuations at room temperature, the skyrmion motion is not deterministic [4]. In other words, this motion follows stochastic law of motion (casual sequence of 0 and 1), and therefore it is natural to think skyrmions as building blocks of random bit generators if combined with a device designed for this scope (see figure 1(a)). The parameters used in our study are the same as in [5]. We have shown, via a full micromagnetic simulations, the possibility to move skyrmions randomly in presence of spin-Hall effect and thermal fluctuations in a synthetic antiferromagnets, where the skyrmion hall effect is absent [5]. We have observed that, under the steady action of the current, skyrmions stochastically divided in the two output branches of our device starting from a continuous nucleation in the input branches (see figure 1 (b)). Our results are also robust to the presence of defects in the form of randomly distributed grains of the perpendicular anisotropy. Our achievements open the path for the design of random bit generators based on skyrmions.