Sergey S. Bukalov
Raman Spectroscopy Center of the Russian Academy of Sciences, Russia
Biography: S.S. Bukalov has got his Ph.D in physics from the Physical Department of St.Petersburg University, his Dr.Sci in chemistry from the Institute of Organoelement Compounds, Moscow. In 1989 he has founded the Scientific and Technical Center on Raman Spectroscopy of the Russian Academy of Sciences and is the Head of this Center. He has published more than 200 papers in reputed journals and was the member of the Organizing Committee of International Conferences on Raman Spectroscopy . His main research activity is application of Raman spectroscopy on its modern level to various fields of chemistry (molecularl structure of carbon modifications, organometallics, polymers, industrial materials) and physics (molecular dynamics, phase transitions).
Abstract: Polydialkylmetallanes are high-molecular-weight polymers with homoatomic main chain, consisting of either Si, or Ge, or Sn atoms. They are of interest not only from theoretical point of view because they behave as conjugated systems, exhibiting electron delocalization along the main chain formed by σ-bonds only, but also as perspective materials for modern microelectronics due to their unique electronic structure and industrially promising properties. Their potential industrial applications as photoresists, one-dimensional semiconductors, and materials for non-linear optics are mentioned in the literature. The most important feature of polydialkylmetallanes is that they undergo phase transitions (PT) of order-disorder type [1-3]. Three types of ordering can occur thereby:
1. Intermolecular ordering, that is, a change in phase state. Polymetallanes can be amorphous, mesomorphic and crystalline.
2. Ordering of the main polymer chain; the latter can be either disordered statistically, or
adopt various ordered conformations. A change in backbone conformation leads to an abrupt change in parameters of electronic absorption band (such a phase transition is called thermochromic) and in all important physical properties of the polymer.
3. Ordering of the side alkyl chains which can have various conformations due to hindered internal rotation about the C-C and C-El bonds.
It was of interest to elucidate the nature of PT of various polymetallanes as depending on the nature of R and El, using adequate and complementary methods of optical spectroscopy: UV and IR absorption spectra and pre-resonance Raman spectra, recruiting also DSC and WAXD techniques. As a result of studying numerous objects, it was found that the three types of ordering are not necessarily interrelated.
The most common are the so-called ‘thermochromic phase transitions’ (TPT), these are mostly transitions from crystalline phases, containing macromolecules with the most ordered (all-A or all-T) backbones and ordered alkyl tails, into mesomorphic state with partly disordered or helical backbones and disordered alkyl tails. These TPT involve all the three types of ordering
However, in some cases PT were observed that consist in expansion of the crystal unit only, without change in its symmetry. These transitions do not involve changes in the backbone conformation, whereas the extra volume of the unit cell allows "melting" of the side chains. For several polymetallanes, structural (not phase!) transitions were found which take place within mesomorphic or amorphous states and involve partial ordering of the main chain (thermochromism) without side chain ordering.
1. Bukalov S.S, Leites L.A. “Raman study of order-disorder phase transitions in polydialkylmetallanes of the typy [R2M]n – organometallic polymers with the main chain consisting entirely of either Si, or Ge or Sn atoms”, 2000, Proceedings of SPIE , 4049, 2-9.
2. Bukalov S.S., Leites L.A., West R., “Regularities fnd peculiarities of solid polydialkylsilane order-disorder phase transitions as studied by optical (UV, Raman and IR) spectroscopy”, 2011, Silicon, 2, 235-245,
3. S. S. Bukalov, L. A. Leites et.al., Russian Chemical Bulletin, International Edition, 2014, Vol. 63, No. 11, 1-12,
The authors are greatly indebted to R. West (University of Wisconsin, Madison, USA), M.P. Egorov (IOCh RAS) and T.D. Tilley (University of California at Berkeley, USA) for delivering samples of polysilanes, polygermanes and polystannanes, respectively, synthesized in their Laboratories.
Abstract: Mucin is the major glycoprotein that is responsible for the viscoelastic properties of mucus gel that lines the stomach epithelial surface. The rheology of mucin is influenced by infection with the gastric ulcer and cancer causing bacteria, Helicobacter Pylori whichswim across the mucus lining and colonize in the harsh acidic environment of the stomach. In this talk we present results on microrheology obtained by tracking spherical tracer particles in culture broth solution and in solutions of pig gastric mucin. The elastic and viscous moduli obtained by tracking particles in the mucin solutions are found to decrease in the presence of bacteria. We also examined the Brownian motion of the bacteria themselves and found that both motile and immotile bacteria can be used to probe the local rheology of mucin solutions and gels. We observed that in mucin solutions motile bacteria display super-diffusive anomalous Brownian motion implying that bacteria reduce the effective viscosity of the mucin solution. In contrast, the immotile bacteria exhibit regular diffusive Brownian motion. Results at different pH will be presented.
Biography: Professor Lin Geng received his Ph.D, in Materials Science and Engineering from Harbin Institute of Technology, China, in 1990, and has been the vice dean of the School of Materials Science and Engineering, Harbin Institute of Technology, China, since 2005. He has published more than 300 papers in the field of Metal Matrix Composites, including aluminum matrix composites and titanium matrix composites.
Abstract: The present work is a comprehensive treatment of structure-property relation of in situ TiB whisker reinforced Ti6Al4V (TiBw/Ti64) matrix composites with a network microstructure. A range of TiBw/Ti64 composites with varying the network degree were successfully fabricated by reaction hot pressing, where TiB whiskers were in situ synthesized along the “grain boundaries” of as-received spherical titanium particles and subsequently formed into a unique network microstructure. The network degree can be controlled by changing the Ti64 particle size and the overall volume fraction of TiBw reinforcement. The results of mechanical testing indicate that the mechanical properties of TiBw/Ti64 composites with a network microstructure are controllable and foreseeable by controlling the network degree. The strength and stiffness increase but the ductility decreases with increasing the network degree
Biography: Qiang Guo received the B.Sc. degree in microelectronics from Peking University, China in 2005, and received the M.Eng. degree in materials science and engineering from Massachusetts Institute of Technology (MIT), in 2006. He obtained the PhD degree in 2010 from National University of Singapore, under the Singapore-MIT Alliance (SMA) program. Between 2010-2012, he was a postdoc in the Department of Applied Physics and Materials Science in California Institute of Technology (Caltech). Since Oct. 2012, he has been an associate professor in the School of Materials Science & Engineering, in Shanghai Jiao Tong University, China. His main research focus is the mechanical properties of micro-/nano-scaled metallic materials.
Abstract: Bulk graphene-reinforced Al matrix composites of various reinforcement concentrations were fabricated via a modified powder metallurgy approach. These composites possess a nanolaminated, brick-and-mortar architecture, where layers of ~200nm-thick pure Al platelets are stacked in a staggered arrangement, and are separated by graphene sheets, each containing 4-5 graphene monolayers. The composite containing 1.5 vol. % graphene were shown to have an uniaxial tensile strength of 302±3MPa, about 50% higher than that of unreinforced Al matrix prepared using the same fabrication route (201±6MPa). Moreover, the composite possess a uniform elongation of 3.4±0.2%, only slightly lower than that of the Al matrix (4.3±0.4%), and have a significantly lower strain hardening capability. Combined with post-mortem and in situ transmission electron microscopic (TEM) analysis, our findings were interpreted in terms of the uniform distribution of graphene in the Al matrix, the effective load transfer between the graphene sheets and Al platelets, and the interaction between mobile dislocations and the graphene-Al interfaces.
Biography: Mr. Ghulam Ali is a final year PhD candidate at Center for Energy Convergence Research, Korea Institute of Science and Technology, Seoul, South Korea. He received his M.Phil degree in solid state physics from the University of the Punjab in 2010. During PhD program, he is doing his research work on the synthesis and electrochemical properties of cathode materials for lithium, sodium and magnesium ion batteries. Moreover, he is specialized in characterizing the cathode materials using synchrotron x-ray based advanced techniques such as EXAFS and NEXAFS at Pohang accelerator laboratory (PAL), South Korea and has more than three years experience to work at PAL. His research work has been published in high ranked journals such as Nanoletters, journal of material chemistry A (front page cover image), ACS Applied Materials & Interfaces, Electrochimica Acta and more.
Abstract: In recent years, numerous efforts have been made to develop high performance rechargeable batteries to use for large scale applications such as electrical energy storage systems (ESS). Lithium ion batteries have been the most popular and widely used batteries in portable devices like cell phones, laptops, etc. However, it has some constraints to be used for large scale applications as the cost for the raw materials for lithium is expensive. There have been ongoing studies searching for alternative shuttle ions and sodium can be one of the possible substitutes since it is more abundant and cheaper.
High performance materials with large sodium storage capacities are required for the realization of sodium-ion batteries. Vanadium pentoxide (V2O5) is considered as promising active material due to its unique crystal structure with large interlayer spacing of 4.4 Å. It is known that layered V2O5 is electrochemically active when the electrode was applied in NIBs but exhibiting less noticeable performances. Herein, we designed the novel composite electrodes which consist of V2O5 nanoparticles and carbon and investigated the electrochemical energy storage mechanism of the electrode materials. Due to the incorporation of carbon-based material, the charge transfer resistance was significantly improved compared to the electrode with V2O5 alone. Accordingly, the nano sized V2O5/C composite has shown a superior reversible capacity as well as high rate capability. The electrodes with fully charged-discharged states have been further investigated by ex situ XRD and the result reveals the reversible sodium de/intercalation. Ex situ TEM analysis of the fully discharged electrode shows both crystalline and amorphous phases of Na2V2O5. In addition, NEXAFS spectroscopy is employed to monitor the oxidation stage changes of vanadium ions upon Na+ insertion/extraction and it is found that the redox (V4+/V5+) is responsible of the delivered capacity.
Abstract: Lithium ion batteries (LIBs) are the best available technology today to push forward the production of eco-friendly electric vehicles (EVs) to reduce the emission of CO2 into the atmosphere. In addition, they are promising for efficient utilization of renewable energy sources which needs to be stored for usage. The transformation from conventional vehicles run by fossil fuels to battery powered EVs are mainly hindered by the high upfront price of the EVs which is mainly due to the high cost of the battery packs used in these vehicles. Hence, cost reduction of LIBs is one of the major strategies to bring forth the EVs to compete in the market with their gasoline counterparts. Cathode materials account for more than 40% of the total cost of LIBs and hence the cost reduction should primarily focus on alternative low cost cathode materials. In this work, Graphene/ MOPOF (Metal Organophosphate Open Framework) nanocomposites, G/K2[(VO)2(HPO4)2(C2O4)] with ~4 V of operation has been developed by a cost effective room temperature synthesis that eliminates any expensive post-synthetic treatments at high temperature and devoid of inert atmospheres like Ar/Ar-H2. Though the pristine MOPOF material can undergo reversible lithium storage, it encounter capacity fading due to intrinsic poor conductivity. Enhanced lithium cycling with minimal capacity fading was witnessed with the graphene nanocomposite owing to the increased electronic conductivity and enhanced Li diffusivity. GITT studies to examine the Li ion conduction in the material revealed the good Li ion diffusion coefficients in the framework, which are of the order of some layered oxide cathodes.
Biography: Dimitrios Vlachos is a physicist working for more than 25 years in the field of surface science. His current interests are mainly focused on the development and characterization of metallic and oxide nanostructures on surfaces. He also interested on how this kind of surface systems interact with gases such as H2, O2, CO2 and water. The investigation of these systems is carried out from the structural and electronic point of view, based on a wide variety of surface analytical techniques in my home laboratory in the University of Ioannina in Greece, and the use of synchrotron radiation facilities in laboratories in abroad such as Max-lab in Sweden and ELETTRA in Italy.
Abstract: In this work, we investigate the growth of Cs overlayer on the SrTiO3(100) surface (STO) at room temperature by means of Auger electron spectroscopy, low energy electron diffraction, electron energy loss spectroscopy, thermal desorption spectroscopy and work function measurements . According to the results, cesium grows in a single amorphous layer, showing different morphology from that on other insulating substrates. The Cs overlayer approximates a two-dimensional metallic phase. No indications for the reduction of the substrate and a Cs–O compound are found. Thermal annealing desorbs part of the metallic Cs, inducing at the same time the surface diffusion of the Cs adatoms to higher binding energy states. The growth and adsorption kinetics of Cs on the STO, shows substantial differences to that of other alkalis such as K  and Li . The reasons for that are discussed.
Having characterized the cesium overlayer on the STO(100) surface, our next step was to study the adsorption of water on that surface system. The interest on water-surface interaction originates not only from fundamental scientific reasons, namely to understand better wetting and corrosion phenomena, but also from environmental concerns underlining the increasing importance of hydrogen as a fuel for green energy production. Despite the scientific effort, our knowledge of water adsorption with additives on surfaces remains incomplete. Thus here, we investigate experimentally the role of cesium as a promoter for water adsorption on the STO surface. In general, strontium titanate is a perovskite with outstanding catalytic properties in photoelectrolysis of water . The motivation of this work is the well known enhancement of the catalytic properties of metal oxides by the addition of alkali species. The results show that water neither dissociates nor interacts strongly with the predeposited cesium on the surface. In addition, no any Cs-H2O compound, was detected, concluding that water adsorbs non-dissociatively on the cesiated STO surface. In contrast, much earlier experiments showed partial dissociation of water and oxidation of the clean STO substrate , while rapid dissociation of water has also been observed on cesium covered MgO(100) surface .
The situation was different when we tried simultaneous adsorption of Cs and H2O on the STO(100) surface. Those experiments resulted in the detection of Cs2O, only if the corresponding Cs coverage was equivalent or larger than 1 monolayer. In that sense, a prerequisite minimum amount of Cs is necessary in order to react with H2O and form cesium oxide. Thus, we conclude that under certain experimental conditions, coadsorption of Cs with water can dissociate the molecule of H2O, resulting in the oxidation of cesium.
Abstract: Aluminosilicate oxynitride and cubic boron nitride (cBN) composites having excellent mechanical properties and chemical stability in room temperature to high temperature applications. In the present study, cubic boron nitride (cBN)reinforcedalpha-Sialonnano-composites were preparedusing spark plasma sintering (SPS) technique. The starting powders including Sialon precursors and various particles size of cBN (10, 20 and 30 wt.%) were homogeneously mixed by probe sonication before sintering. The effect of SPS processing parameters on the densification and mechanical behavior of these nano-composites were investigated. These cBN enabled in the densiﬁcationsialon composite samples were analyzed for phase identification by X-ray diffraction. As well as, composite samples were evaluated to find cBN to hBN transformation in the Sialon matrix sintered at 1500C. Field emission scanning electron microscopy(FESEM) used for morphology and hardness and fracture toughnesswere measured.
Abstract: The field of nanotechnology is increasingly leading to the elaboration of multifunctional materials for various applications (electronics, photonics, catalysis, biomedicine, sensing...). Owing to their very small size, nanoparticles (NPs) show significantly higher properties than the homologous bulk material such as optical or superparamagnetic properties among others. Additional properties can be merged trough the specific surface coating with organic molecules. We decided to create a new material with novel properties, not present in either the nanoparticle or the bulk form of the material.
Here, we actively add and tune physico-chemical properties to the existing one of iron oxide nanoparticles (NPs).We describe the bottom-up construction of a photoluminescent, superparamagnetic and microporous network. This array was built by threading a viologen-based ditopic ligand, diphenylviologen, DPV2+, into the cavity of cucurbituril (CB) macrocycles adsorbed on the surface of the NPs (CBNPs).
The CBNPs are used as building blocks to fabricate functional nanostructures via self-assembled architectures due to molecular recognition on the NP surface. Evidences for the formation of 1:2 inclusion complexes involving DPV2+ and two CB macrocycles was first obtained in solution by 1H NMR and emission spectroscopies. The same mode of interaction between DPV2+ and CB occurs on the surface of CBNPs and results in nanoparticle self-assembly. Samples of the DPV2+CBNP network were characterized by measuring N2 adsorption/desorption which established the presence of defined pores. Viologen-mediated self-assembly of CBNPs did not affect the core structure (i.e. the crystallinity) of the iron-oxide nanoparticles, yet their superparamagnetic properties were enhanced. This result reflects increased aggregation and stronger random dipole-dipole interactions between the nanoparticles. Self-assembled CBNPs were found to be fluorescent in solution and in the solid state as a consequence of the inclusion of the viologen ligand within the cavity of CB. Fluorescence lifetime measurements of CBNPs in the solid state in the absence and the presence of DPV2+ support the hypothesis that DPV2+ drives the self-assembly of these 3D nanoparticle arrays.
This facile supramolecular approach to NP self-assembly provides a platform for the synthesis of hybrid materials with ordered structures and properties such as superparamagnetism, luminescence and, potentially, selective porosity. This magnetic, porous and fluorescent self-assembled network can provide a useful tool to the elaboration of the next generation of nano-devices for spintronic, magnetic magneto-electronic and biomedical applications.
Biography: Muna Khushaim is an Assistant professor at physics department in Taibah university (Al-Madinah, Saudi Arabia). She had completed her Bachelor degree in Science and Education in 2002 from the department of physics,College of Education (Saudi Arabia). In 2007, she had completed her Master degree in Theoretical Nuclear Physics from King Abdul-Aziz University (Saudi Arabia). Recently in 2015, she has awarded the PhD degree in material science and engineering from King Abdullah university of science and technology (KAUST) (Saudi Arabia). During her research, Dr. Khushaim became exposed to many sophisticated analytical techniques including different methods. She is an expert of atom probe tomography technique in the GCC area. The main topic in her research is to investigate the link between the physical properties of complex industrial metallic materials such as aluminum based alloys and the arrangements of their components at atomic scales.
Abstract: Aluminum alloys and intermetallic are being widely investigated as potential aerospace materials. These alloys offer the promise of low density, improved specific strength, high ductility, high fracture toughness and high stiffness to weight ratio. Different light weight elements such as Si, Ca and Mg are commonly added to improve the strength and the ductility of this material. In this study, metal flux has been employed as a synthesize method for a single phases. The considerable potential of aluminum liquid is demonstrated as a powerful synthesis solvent of important intermetallic phases such as:〖 Mg〗_2 Si, 〖Al〗_2 Mg and CaMgSi.
The mechanical properties of the synthesized system have been estimated through the hardness analysis using nano- indentation hardness test. The microstructure evolution and the phase analyses were examined using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The interactions between single crystals and the eutectic microstructure of molten flux is rather complex and yet to be fully understood. Thus, tracing of local chemistry on atomic scale is crucial.The atom probe tomography technique is utilized to characterize the intermediate reaction steps of the flux-grown intermetallic phases. The study proposed a direct approach to investigate the involved reactions during the formation of the synthesized intermetallic phase.
Abstract: The main objective of this research is to investigate the fracture analysis of jute sandwich compositeswith 32 Vol% fiber weight content fabricated by modifying the hand lay-up technique with resin pre-impregnation into the jute fiberin the vacuum. This was carried out through open hole tension testwith different ratios of the specimen width, W to hole diameter (D=10.2 mm) with three different values (1.7, 2.3, 3) using the characteristic distance(do) principle based on the microstructure of these composites applying Whitney-Nuismer mathematical model. Therefore in this work, the physical meaning of dowas validated for different W/Dratios through the microstructure of the composites based on the calculated do.This was carried out through calculating and comparing thefiber pull out lengths from hole side up to doand from doto the end side of the specimen. The results showedthat the average fiber pull out length wasshorter after the crack reaches do than that over the characteristic distance do whichvalidated and confirmedthat after the crack reachesdo the brittle fracture has beenoccurred.
Biography: Arwa Albar is currently a Ph.D student in Material Science Engineering, King Abdullah University of Science and Technology, Saudi Arabia. Her research is based on first principle a calculation which is used to investigate the electronic, magnetic, and structural properties of oxide materials under defects and interfaces.
Abstract: The electronic properties of stoichiometric SnO/SnO2 interfaces are investigatedusing density functional theory. Metallic states are demonstrated to be formed betweenthe two insulating oxides, independent of the interface termination. The propertiesof the metallic states are studied and the mechanisms responsible for their creationidentified. Besides the defects that are always present in the experiment, the observedinterface metallicity contributes significantly to the conductivity of mixed phasesamples
Abstract: One of the primary complexities affecting the flow of cement bulk powder is the formation of cohesive arching at the outlet of the hopper, causing blocking of the silo opening and bridge formation. In this context, the interactions of particles lead to a high degree of consolidation of the cement powder and an increase of adhesion force due to the small size and the large surface area of the cement particles. A simple concept is established which outline these complications and try to find out an issue to prevail over this undesirable property of cement flow. The results from the consolidation test and the flow properties (cohesion) show that the cement powder flow is mainly controlled by internal forces (Van der Waals) and external forces (elastic and plastic), these forces have a direct influence on the powder structure, leading to a variable packing behavior.
Biography: Hadi has a bachelor degree in Computer Science and Masters in Information Technology.Currently he is a M.Sc. student at Concordia Institute for Information Systems Engineering at Concordia University in Montreal working as a research assistant in fields of innovation networks. So far, he collaborated in several other publications of the same field focusing on collaboration networks and scientific output of researches. His current research interests involve the investigation of science and technology interactions trough study of citation networks.
Abstract: In today’s world, relationship between domains of science and technology is getting stronger as science contributes to technology in different ways. The interaction between scientific and technological domains is happening in complex innovation processes in which new technological ideas emerge as a result of new discoveries in science. This research aims to investigate interactions between various emerging scientific and technological domains and their influences in the development of both patents and publications in the field of nanotechnology.
The study uses real data of the journal articles and patentsin nanotechnology between 1995 and 2008 which we clustered into scientific and technological domains. In clustering phase, terms and phrases were located in each record using singular value decomposition algorithm and then documents were assigned to cluster labelsby applying standard vector space model algorithm on them.To achieve our research goals, in next step, we built the network of nanotechnology article-patent citations and investigated various network topological parameters over all nodes. The patent-article network is built on citation links among different nodes of patents and articles, while patent nodes cite a set of NPLs (Non-Patent Literature) and NPLs are also citing another set of articles as their references. Focusing on the role of NPLs, we studied trend of network topological parameters likebetweenness centrality and degree centrality while looking at correlation between them. We highlighted leading patents in technology and leading articles in NPLs and their cited articles set which could be seeds of innovation in nanotechnology.
Our main results of this research are focused on the role of NPLs as gate-keeper nodes in bridging ideas from scientific to technological domains. Comparing NPL citation counts to articles and patents, results show higher range of NPLs’ contribution to the development of scientific fields than technological domains in Canadian nanotechnology. We also highlighted most cited and citing NPLs nodes of article-patent citation network as significant nodes in connecting science and technology. Using average of citations per article metric, we calculated the rate in which different technological domains influenced by scientific NPLs and also the impact of NPLs on development of different scientific and technological domains. Regarding the contribution of top cited NPL articles in development of scientific domains, we discovered a positive correlation between citation count and betweenness centrality measure of articles, which indicates the more an article is cited by patents and other articles, the more influence it has on the transfer of ideas from scientific to technological domains. We also observed thatcitation count value of journals in our citation network has a positive relation with the number of scientific domains it contributes to. In addition, we discovered the positive relation between patent citations count and journal’s impact factor. This is interesting to us since we can see the more articles of a specific journals are cited by patents, the more impact factor the articles of that journal have. In other words, impact factor not only shows the impact of articles on development of scientific domains, it also shows how the articles of a journal have impact on development of technological domains.Regarding the NPL’s contribution to development of technological domains, we found a positive relation between NPL journals’ citations to technological clusters and the number of technological clusters they cover. Results showed the increasing trend of journals’ contribution to different technological domains as citation count value of journals increases.
It is worth to mention that this study is the first to examine the flow of ideas from scientific to technological fields which uses a citation network of both patent and article nodes,and investigating leading articles and patents which play a crucial role in keeping this knowledge flow alive in nanotechnology related sub-fields.
Nanophotonics and Optics
Molecular Electronic and Optoelectronic
Electronic, Optical, and Magnetic Materials
Abstract: Fluorophores are often used in bioanalytical and medical applications as labels and sensors but their applications are not limited to these areas. There have been continuous research efforts to increase fluorescence intensity of these reporting labels and probes. One approach to achieve high fluorescence intensity is to incorporate several fluorophores into a single reporting or sensor entity which chemical and physical properties are controlled. Nanotechnology made possible these new designs. The most stable sensor and reporting label can be made if the fluorophores are copolymerized into the nanoparticle. Silica nanoparticles are one of the most economical ways to achieve these goals. Fluorescent dye copolymerized silica nanoparticles can be made of using almost any desired fluorophores, or more than one type of fluorophores, that can be modified to have suitable functional moiety for covalent binding to the silicate monomer used during the silica nanoparticle synthesis. Although fluorescent silica nanoparticles can be made by simply saturating commercially available porous silica nanoparticles with fluorescent dyes; solid or porous silica nanoparticles containing covalently copolymerized dyes have much superior properties as no leaching would occur. For example using appropriate functional moieties, absorption and fluorescence properties of the nanoparticle would change when complexes to metal ions, to detect pH changes, bind to biological molecules, etc. NIR dyes that are copolymerized in these structures have significant spectral advantages over visible dyes as the NIR spectral region (650-900 nm) offers reduced background interference and larger penetration depths. Fluorescent dyes confined to such small volume (20-100 nm diameter) often prone to self quenching. This can significantly be reduced by using dyes that have larger Stokes’ shift. This presentation discusses facile synthesis of dye copolymerized silica nanoparticles. This can be achieved for example by using dye modified TEOS during the silica nanoparticle synthesis. The molar ratio of TEOS and modified TEOS will determine the fluorescent dye load in the silica nanoparticle. Dependent on the functional groups present in the reporting dye to be used to prepare the modified TEOS and its spectral properties, the resulting silica nanoparticle can be used for many applications. Several advantages emerge from using silica nanoparticle protected sensors; such as higher dye stability and brighter fluorescence. Several applications will be discussed including chemical, biological and medical uses of these fluorophore copolymerized silica nanoparticles.
Biography: Prof. G. D. Sharma was born in 1957. He received his Ph.D. degree in Physics from Indian Institute of Technology, New Delhi, India. After that he joined as Assistant Professor in November 1985 at Department of Physics, JNV University, Jodhpur and was promoted to the post of Professor in same department in 2003.During 1990–1991, he worked as postdoctoral fellow in the Department of Electrical Engineering, The State University of New Jersey, USA, and worked on organic photovoltaic devices. At present, he is working as Director (Academic and Research) of JEC group of Colleges, Jaipur Engineering College campus, Kukas, Jaipur, since April, 2009. His research area includes organic solar cells based on conjugated polymers, small molecules, and dye sensitized solar cells. He had national and international research collaboration, published more than 210 research papers in international journals. 16 students have completed their Ph.D. degree under his supervision. He has completed many research projects funded by Government of India and Joint International projects, with Greece, Spain, South Korea, United Kingdom, Russia and Japan. He is visiting Professor in many international Universities and research Institute. He had frequently visited many countries like USA, Greece, Spain, Switerzerland, France, Japan, Singapore, Egpt, United kingdom, South Korea, Austria, Pourtgal and Finland and delivered many invited lectures.
Abstract: At present, a considerable amount of research work is inclined toward potential alternatives for diminishing sources of fossil fuels. The enormous amount of solar energy reaching to the earth surface alone can fulfill the world increasing demand of energy. Solar cells are the devices that convert solar energy directly into electrical energy. Among the several solar cells, dye sensitized solar cells (DSSCs) represent one of the most promising devices for future large scale power production from renewable energy sources. In these solar cells, the sensitizer is one of the key components harvesting solar radiation and converting it into electricity. The electro-chemical, photophysical, and ground and excited state properties of the sensitizer play an important role for charge transfer dynamics at the semiconductor interface. Over the last 20 years, ruthenium complexes and donor-bridge-acceptor organic sensitizers endowed with anchoring groups have maintained a clear lead in generating power conversation efficiencies ~12 % with cobalt complex as a redox mediator . However, the relatively high cost and environmental concerns associated with the use of Ru-dyes have prompted researchers to develop Ru-free organic dyes which are highly economical, easier to process and could be modified or functionalized as desired as an alternative choice of sensitizers . In particular, the design and development of donor–acceptor -conjugated (D––A) dyes with both electron donating (D) and electron-accepting (A) groups linked by -conjugated bridges, which possess high molar extinction coefficients, are expected to be one of the most promising metal free organic sensitizers  and reached power conversion efficiency (PCE) of 12 % . Porphyrin-based D––A dyes provide a highly flexible platform for the development of panchromatic sensitizers . The validated DSSC efficiency record under standard air mass 1.5G reporting conditions using porphyrin sensitizers stands presently a landmark PCE of 13 % . In this talk we have discussed the molecular engineering aspect of meso-substituted porphyrins, in particular donor-π-bridged chromophore-acceptor porphyrin sensitizers (“push− pull”) and metal free organic dyes and their photovoltaic performance in DSSCs
Abstract: Within the past decade, research on ultracold
atoms has moved from the investigation of their
fundamental properties to the application of ultracold
samples in quantum simulation and precision
metrology. The ability to tailor external
potentials freely and to manipulate the interaction
strength within the samples has led to numerous
advances in the field. In particular
mixed quantum gases have attracted considerable
interest, since they offer a wealth of research
opportunities. These include the creation of
deeply bound dipolar molecules , the investigation
of few-particle physics [2, 3], the observation
of quantum phases in optical lattices 
and precision measurements . Such mixed
quantum gasses can generally be realized by
using a single atomic species in multiple quantum
states, by using multiple isotopes of the
same species, or by using different atomic species.
Thus it is possible to realize Bose-Fermi,
Bose-Bose or Fermi-Fermi mixtures. Since
cooling techniques to achieve ultracold temperatures
have become available for an increasing
number of atomic species, this leads to a considerable
number of possible mixtures. Here, we
present the production of dual-species Bose-
Einstein condensates of 39K and 87Rb. Preparation
of both species in the |F = 1, mF = −1>
state enabled us to exploit a total of three Feshbach
resonances which allows for simultaneous
Feshbach tuning of the 39K intraspecies and the
39K-87Rb interspecies scattering length. Thus
dual-species Bose-Einstein condensates were
produced by sympathetic cooling of 39K with
87Rb. A dark spontaneous force optical trap was
used for 87Rb, to reduce the losses in 39K due to
light-assisted collisions in the optical trapping
phase, which can be of benefit for other dualspecies
experiments. The tunability of the scattering
length was used to perform precision
spectroscopy of the interspecies Feshbach resonance
located at 117.56(2) G and to determine
the width of the resonance to 1.21(5) G by
rethermalization measurements. The transition
region from miscible to immiscible dual-species
condensates was investigated and the interspecies
background scattering length was determined
to 28.5 a0 using an empirical model. This
paves the way for dual-species experiments
with 39K and 87Rb BECs ranging from molecular
physics to precision metrology.
Abstract: AgI thin films were deposited on amorphous commercial glass substrates with chemical bath deposition. The structure of the films was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Structural properties were calculated with Scherrer formula which were grain size (D), dislocation density (δ) , the number of crystallites per unit area (N), lattice parameters along the (111) at pH: 2, (300) at pH: 3, (300) at pH: 4, (001) at pH: 5 and (001) at pH: 6 plane. While γ-AgI phase was observed at the lower pH (pH: 2 - 4), iodine concentration increased above pH: 5 - 6 and γ-AgI phase transformed to β-AgI phase on XRD spectrum. Optical properties scanned between pH: 2- 6 values at 6 hour deposition time were investigated with UV-VIS spectrophotometer. The transmission and reflection values of AgI films scanned between pH: 2- 6 are 32, 35, 3, 11, 9 % and 27, 25, 61, 45, 49 % in 550 nm, respectively. The refractive index had the highest at pH: 5 value. The film thicknesses are decreased with increased pH values, and The film thickness affected the refractive index and extinction coefficient
Nanotechnology for Energy and the Environment
Biography: Professor Zulkhair Mansurov is a General Director of the Institute of Combustion Problems of the Ministry of Education and Science of the Republic of Kazakhstan.
Zulkhair Mansurov successfully defended PhD and Doctor of Sciences dissertations in 1973 and 1990, correspondingly. In 1981 Zulkhair Mansurov got 10-months scientific probation at the University College of London, Great Britain.
Professor Mansurov’s scientific activity includes study and investigations of kinetics and mechanisms of hydrocarbon combustion and structure of cool soothing flames: catalytic carbon formation and its applied aspects. In 2002 group of scientists headed by Professor Mansurov has received Diploma for discovery of “Phenomenon of low-temperature cool-flame soot formation”, issued by the Russian Academy of Natural Sciences, Russian Federation, International Academy of the Inventors Association.
Professor Zulkair Mansurov’s professional career includes longstanding activity in INTAS Council of Scientists. He is a Editor-in-Chief of “Combustion and Plasmochemistry Journal” and “Eurasian Chemico-Technological Journal” issuing in English, indexed at Scopus.
Abstract: This paper presents the results of investigation the synthesis of metal oxide nanoparticles in hydrocarbon flames and their application for improving the efficiency of solar cells.
Metal oxide nanoparticles have synthesized on the nichrome wires in thickness of 3 mm in the diffusion counter-flow propane-oxygen (φ=1) flame. The X-ray spectroscopy shows the component of the nichrome wire: nickel (70 %), iron (21 %) and chrome (8.72 %). The investigation of the influence processing time of the wire in flame show that with increase processing time of the wire in flame rising the size of metal oxide nanoparticles. The flame treatment of the wire in during the 5 seconds led to synthesis of metal oxides nanoparticles with size of 70 nm. The flame treatment of the wire in during the 5 and 10 minutes led to synthesis of chrome (III) oxide (Cr2O3) and metal oxides (NiO, Ni2O3, Cr2O3 Fe2O3, and FeO) nanoparticles with size of 300 and 700 nm, respectively.
It was studied the influence the synthesized metal oxides nanoparticles with different size to increasing the efficiency of solar cells. The result of investigation show that coating the surface of the silicon solar cell with size of nanoparticles of metal oxide 300 nm led to increase the output load voltage up to 4-7%, short-circuit current up to 20-28%, which in the aggregate resulted in increased efficiency of solar cells by 2-3%.
It has proposed the theoretical analysis of the mechanism of the influence of metal oxide nanoparticles to increase the efficiency of the solar cell.
Biography: Victor Hugo Morales Bermudez PhD. Bachelor degree from the Faculty of the Autonomous University of the State of Mexico Biology.Master of Science in Immunobiology at the School of Biological Sciences at the Autonomous University of Nuevo Leon.Currently Doctor of Science from the Faculty of Medicine of the National Autonomous University of Mexico.
Abstract: Polysaccharides and other cationic polymers have recently been used in the industry, pharmaceutical research and the biomedical sciences for their properties to control the release of antibiotics, proteins, peptide drugs, vaccines and DNA. Among them, chitosan is an excellent polymer that has attracted attention in the biomedical fields since it possesses well known beneficial biological properties including biocompatibility, low toxicity, biodegradability, mucoadhesiveness, haemostatic ability and antimicrobial/antifungal activities. Chitosan is one of the most widely used non-viral vectors gene delivery and will be an excellent vehicle to treatment of cancer. Our intention is use the chitosan conjugates with the IL-12-gene to release the gene into tumor cells as cervical cancer treatment. Nanoparticles were generated with Plasmid pNGVL3-mIL-12by coacervation method using 0.25%, 0.50% and 0.75% of chitosan and 50 g of plasmid DNA. Plasmid DNA encapsulation efficiency in the microparticles was approximately 89-98% into the polymers. The high MW chitosan was the best polymer able to encapsulate the plasmid DNA (98%). We observed increase the viscosity with the concentration of DNA-chitosan and with the molecular weight of the polymer. Chitosan microparticles provide a good polymer to encapsulate the DNA and protection of degradation.
Biography: Dr. Ramesh Chaughule has completed his PhD from Tata Institute of Fundamental Research, Mumbai, India, and a pioneer institute in India. Also he graduated in Electronics and Telecommunication Engineering. Presently he is an Adjunct Professor at Ramnarain Ruia College, Mumbai, India. Dr. Chaughule has pioneered in the field of NMR and MRI. He was deputed to Indonesia by IAEA several times as an IAEA expert in the field of NMR. He is an awardee of many international Fellowships to carry out research programs in different countries. Besides number of research publications and book chapters to his credit, Dr. Chaughule has edited several books on MRI and Nanotechnology published by American Scientific Publishers, USA. He has organized several international conferences in India
Abstract: One of the most challenging problems in restorative dentistry is polymerization shrinkage and low strength due to their inferior mechanical properties. The introduction of resin material Bisphenol A glycidyl methacrylate, or Bis-GMA, has changed its chemical structure dramatically, to overcome the problem of shrinkage, thermal expansion, and low strength to some extent. The introduction of nanotechnology led to the discovery of nano-filler particles. Hybrid composites were developed by combining inorganic glass fillers of various sizes to provide better strength and smooth finish. Nanocomposites are composed of two or more materials that include a matrix material and nanoscale particles. The properties are improved drastically by reducing the size of fillers based on nanotechnology. The properties of nanocomposites (good translucency, contouring and surface finish) are excellent and can restore lost or damaged dental tissues. In addition, such materials should have bioactive and biocompatible properties at the interface between the material and tissue to prevent micro-leakage and ingress of bacteria. The composite resins consist of three basic phases - the organic phase (matrix), the dispersed phase (filler) and the interfacial phase (coupling agent). The resin matrix is a mixture of methacrylate/acrylate monomers. During the application the monomers of resin matrix are polymerized to crosslinked polymer structure by free radical nonlinear polymerization process. In order to achieve a strong covalent interaction in between the organic matrix and inorganic fillers, coupling agents are used. The coupling agents tend to promote bonding or adhesion between the filler particles and matrix and helping in the transfer of load and stresses. A commonly used coupling agent is gamma methacryloxy propyl trimethoxysilane (MTPS). One side of the coupling agent tends to bond with hydroxyl groups of silica particles and other is copolymerized with polymer matrix.
A study of the modification of dental nanocomposites with nanosized fillers is presented. TiO2 has good antibacterial properties that depend on the surface of the material and decrease in size of the nanoparticles. It is not toxic so it was selected as an additive to the dental nanocomposite material. The principal aim of this study was to synthesize dental nanocomposites with different sizes, treated, nano-TiO2 fillers in resin matrix for potential application in posterior restoration and to evaluate their mechanical properties. The incorporation of TiO2 (titania) nanoparticles, via a silane chemical bond, to the dental acrylic resin matrix shows an increase in the wear resistance, flexural strength and surface hardness properties of the dental nanocomposites. For comparison, a commercially available dental resin was reinforced with untreated and treated nano-TiO2 particles with various sizes.
Biography: Hans-Peter Deigner currently is Professor of Pharmacology and Vice Dean of the new faculty of Medical and Life Sciences (Furtwangen University, Germany, http://www.hs-furtwangen.de/ ), also holds an affiliation with Fraunhofer, IZI (Leipzig, Germany). During the past years he applied metabolomics to identify and develop biomarkers at Fraunhofer Institute IZI / EXIM, Rostock, Germany and Biocrates AG, Innsbruck, Austria.
Hans-Peter has extensive experience in omics and biomarker research including several senior management positions positions in Biotech companies. He authors about 75 peer reviewed articles and 40 patents / patent applications and is a regular reviewer for numerous scientific journals and funding agencies. While holding senior management positions in biotech industry he has developed novel molecular diagnostics from the idea via the prototype to the final commercial product. From 2004-2006 he took up a chair in Biomedicinal Chemistry, University of East Anglia, Norwich, UK. Hans-Peter Deigner graduated in pharmaceutical chemistry, Heidelberg University, Germany and after a position as research associate at Harvard Medical School returned to Heidelberg to finish his habilitation and to work as group leader and senior lecturer/associate professor. His current research interests comprise the integration of omics data and its combinatorial use in biospecimen & biomarker research, systems biology, molecular diagnostics and individualized therapy
Abstract: Color multiplexing or simultaneous data readout without the need of spatial separation is a popular and convenient approach in current research. The opportunity to multiply the amount of analytes per sample by using a combination of dyes in molecular probes offers the potential to enhance scope and usability of conventional analytical techniques such as immunoassays. Gold nanorods can be conjugated to capture molecules like antibodies to form effective bioprobes. Their high extinction coefficients ensure a very high signal intensity and subsequently high sensitivities.
We here report on the generation, characterization and combinatorial use of gold nanoparticles including gold nanorods in multiplex assays. Their optical properties in the near infrared (NIR) range allow quantifiable signal separation due to sharp absorbance bands. The performance, signal separation and detection limit in multiplexing assays based on absorbance spectrometry is further improved by applying statistics to data processing and thus final readouts. The combination of various gold nanorods (3 and more) as multiplexing dyes with close spectral range (eg. 700-1200nm) and partial overlap is demonstrated offering an interesting alternative approach to conventional fluorescence tags making complex light and color filter setups expendable.
Biography: Dr. Farhat Afrin received her Ph.D. from Indian Institute of Chemical Biology, Kolkata, India where she worked on liposomal vaccines and drugs against visceral leishmaniasis. For 16 years, she was a Faculty member in the Department of Biotechnology, Hamdard University, New Delhi, India. She also worked at National Institutes of Health, Bethesda, MD, USA and Centre for Immunology and Infection, University of York, UK. She is a recipient of several honors including American Association of Immunologists Young Faculty Travel Grant, Commonwealth Academic Staff fellowship, Indian Council of Medical Research International fellowship for Young Indian Bio-medical Scientists and Department of Biotechnology Overseas Associateship. Her research interest is parasite immunology with emphasis on nanoparticles for vaccines and immunotherapeutics of Leishmania infection. She has published over 55 papers in Journals of International repute and is an Academic Editor and reviewer of several journals.
Abstract: Leishmaniasis encompasses an array of clinical syndromes ranging from self-resolving cutaneous to mucocutaneous and severe visceral manifestations, which result from infection of macrophages in the dermis, the naso-oropharyngeal mucosa, and the reticuloendothelial system, respectively. Cutaneous and mucosal leishmaniasis can cause substantial morbidity, whereas visceral leishmaniasis (VL) or kala-azar is systemic and can be life threatening. In the absence of effective vector control measures and vaccines, chemotherapy remains the mainstay in the control of VL, a neglected disease of poverty. There is a pressing need for alternate rescue therapy due to escalating drug refractoriness, coupled with adverse effects, emergence of HIV co-infection, and resurfacing in the form of post kala-azar dermal leishmaniasis after apparent cure. The Leishmania parasites evade host defensive machinery, encumbering antigen presentation to T cells, and eventually leading to subversion of cell-mediated immunity (CMI). Thus, a promising therapeutic approach would entail administration of antileishmanial compounds, which can concurrently rejuvenate an effective T-helper-1 response, for subsequent macrophage activation to eliminate intracellular Leishmania amastigotes.
Sesquiterpene lactones exhibit a wide spectrum of antimicrobial activities. Artemisinin belongs to a class of sesquiterpenes with potent antileishmanial activity but has limited access to infected cells, being a highly lipophilic molecule. Association of artemisinin with liposome is a desirable strategy to elude the problem of poor accessibility, thereby ameliorating its efficacy in a murine model of experimental VL. Nanoliposomal artemisinin (NLA) was prepared by thin film hydration method and optimized using Box-Behnkehn design. The NLA was free from concomitant signs of toxicity, both ex vivo on murine macrophages as well as in vivo in healthy BALB/c mice. NLA significantly denigrated the intracellular infection of L. donovani amastigotes ex-vivo as well as in vivo. Protection coincided with modulation of CMI as evidenced by the positive delayed type hypersensitivity response, lymphoproliferation after antigen recall in vitro, induction of Th1 signature cytokines and protective antibody isotypes. This nanoliposomal drug delivery system for artemisinin with synergistic Th1 immunopotentiation may serve as a promising alternative intervention against VL.
Abstract: Chemotherapy seeks to minimize tumor progression and increase patient survival. However, the main problem is to find a balance between the drugs therapeutic effect on cancer cells and their deleterious effect on healthy cells. Due to their high hydrophobicity or rather their high hydrophilicity, these molecules must be injected in high and frequent doses, to avoid a rapid elimination and overcome their lack of specificity. Unfortunately, the high chemotherapeutic doses have side effects that patients find difficult to tolerate. Additionally, the diagnosis and imaging of tumor evolution remain a challenge.
In this aim, we developeda theranostic platform consisting of iron oxide (γ-Fe2O3) nanoparticles (NPs) coated with water soluble and biocompatible cucurbituril (CB) macrocycle (Figure 1). The inner cavity of CB is hydrophobic, and allows the encapsulation and the transportation of hydrophobic drugs. Nile Red (NR), a hydrophobic dye, was first loaded into the cavities of the surface-adsorbed CBs, and intracellular delivery of the dye to colon cancer cells was observed by confocal laser scanning microscopy. Powerful anticancer drugs (Paclitaxel, Doxorubicine and Cis-Platine) had been successfully encapsulated improving drastically their solubility. In vitro results demonstrate that encapsulation of drugs in the CB cavities on the NP surfaces facilitates the cellular internalization of the drug, thereby enhancing its anti-cancer properties particularly during hyperthermia sessions, combining chemotherapy to thermotherapy.
Abstract: Silica (SiO2) has been considered as one of the most promising materials for anode of lithium ion batteries (LIBs) owing to its low discharge potentials and high theoretical specific capacity. Furthermore, SiO2 is a resource abundant, low cost and environmental friendly material. However, the practical use of SiO2 nanostructure is hindered by its intrinsic poor electric conductivity and large volume changes during repeated charge-discharge processes. To overcome these drawbacks, we fabricated a SiO2/3D porous carbon nanocomposite by a facile and environmentally friendly synthesis route. The structural and electrochemical characteristics of the composite anode material have been investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and electrochemical measurements. It is found that carbon matrix with three dimensional porous structure is favorable for the short transport of both electrons and Li ions, leading to good conductivity and fast charge/discharge rates. Moreover, the porous structure of the matrix could efficiently alleviate the volume expansion of SiO2 during Li intercalation. As a result, the SiO2/porous carbon nanocomposite demonstrated a high reversible capacity of 498.8 mAhg-1, good cycling performance (a specific capacity of 434 mAhg-1 after the 50th cycle at a current density of 100 mAg-1) and high rate capability (187.4 mAhg-1 even at 5 Ag-1).
Biography: Dr. Mohammad Amjad Kamal is a Distinguish Adjunct Professor at the King Fahd Medical Research Center (KFMRC), King Abdulaziz University, Jeddah, Saudi Arabia. He is leading a highly productive and collaborative world-wide research team. Dr. Kamal's biochemical research has culminated in more than 220 publications in internationally respected journals, and 64 abstracts at international conferences. His research involves ongoing collaborations with numerous international scientific teams and, as an example among many successful projects, was pivotal in supporting the development of novel experimental drugs to treat Alzheimer's disease from conception in the laboratory to the clinic with his longtime collaborator, “Dr Nigel H. Greig” (Chief, Drug Design & Development Section, NIA, NIH, USA).
Dr. Kamal migrated to Australia in 1998 and was awarded a prestigious U2000 Postdoctoral Fellowship in 2000 by the University of Sydney, School of Molecular and Microbial Biosciences. Amongst numerous projects, Dr. Kamal also collaborated on the molecular biological research project "Type 2 diabetes and Alzheimer's disease" at the University of Technology, Sydney - the commonalities underpinning these two disorders that impact a huge proportion of the world population remain an area of his current scientific focus. At present, he is also editing two eBooks (https://sites.google.com/site/globesciencement/).
Abstract: Applications of nanotechnology in modern medicine are a hot topic of today’s research for the diagnosis and treatment of various diseases such as neurodegenerative disorders and cancer. Nanomedical approaches for cancer diagnosis are also among the popular approaches in latest research. For a successful application, it is necessary to use highly selective and appropriate nanomaterials such as nanofabrication, nanocomposites, carbon nanomaterials and multifunctional materials. There are various nanotechnologies such as Nanodevices for different disciplines, e.g. Tissue Nanoengineering, Nanomedicine, Biomedical Engineering, Nanobiotechnology, Nanophotonics, Nano-Optics, Medical Robotics and Mechatronics, etc. Therefore, it is essential to setup a worldwide legislation to make international policies in order to regulate that body for safe applications and risks-free management of nanotechnological devices, especially their application in the medical field.
Biography: Atsushi Nagai has completed his Ph.D at the age of 28 years from Yamagata University and postdoctoral studies from Kink, Kanagawa, and Kyoto Univeristies. He have been the assistant professor of Kyoto Univeristy unitil 2010. After that, He is now Assistant Professor and visiting assistant professor at IMS and UTSW, respectively. He has published more than 65 papers in reputed journals
Abstract: New -conjugated oligomers with high crystallinity were prepared from the simple solvothermal reaction of squaric acid and diaminopyrenes. The oligomers were bonded at the 1,3- and 1,6-positions of the pyrene units, which greatly affected their planer configuration and resulting mechanochromic properties. Oligomers containing a charge transfer (CT) complex were selectively synthesized in one step. Upon mechanical grinding in the solid state, the color changed from orange to deep metallic green. However, this property was lost in solution. To overcome this limitation, we envisioned ordering the CT complexes into a templated design, on a polymer backbone to promote enhanced tumor retention for imaging applications. It is known that the modular structure of CT complexes coupled with environmental dependence on CT properties allows the control over crystal structure and optical properties by alternating CT interactions between electron donors and acceptors. Because small molecule CT complex particles have shown utility in biomedical imaging,29 we were inspired to design CT complexes based on supramolecular self-assembly of natural polymers, which would enable enhanced tumor retention for in vivo imaging applications. Next presentation introduces newly the preparation of CT complex-connecting cellulose. The blue and red emission of CT complexes appended to a cellulose template was induced by using nanoprecipitation, in which a DMSO solution of CT-cellulose was precipitated drop wise into a large amount of water under stirring to form nanoparticles with an aggregation-induced emission effect. Furthermore, due to the biocompatible nature of the CT emission-active material, the cellulose-CT NPs were nontoxic to cells in vitro and could be used for biological imaging.
Nanotechnology for Energy and the Environment
Biography: Dr. Ahmed obtained his Bachelor degree in Chemical Engineering from King Saud University, Riyadh, Saudi Arabia, his Master (2001), and Ph. D. (2004) from Graduate School of Engineering, Mie University, Japan.
Dr. Ahmed was appointed as a full time research in Mie Industry and Enterprise Support Center (MIESC), Japan from (4/2005 – 6/2007). Full time researcher in Anotsu Research Institute for Environmental Restoration (ARIER), Mie, Japan from 7/2007- 4/2009). From 5/2009 joined TATI University College, Terengganu, Malaysia as a lecturer, became the Dean of Chemical Engineering Technology, at the same university from 8/2012 to 2/2013. From 3/2013 till 12/2014; he was promoted as the Dean of Research Management Centre (RMC), in the same university. Currently he is a Senior Lecturer in the Department of Chemical Engineering Technology, TATI University College supervising students final year projects and monitoring different research grants.
Besides his research and academic activities including publications, funded projects, supervision of postgraduate students and undergraduate projects, he is also an accomplished expert in the sustainability, industrial wastes, and wastewater treatment processes, carbon dioxide chemistry, fuel production, analytical atomic spectrometry, pollution prevention, physical‒chemical treatment. Moreover, he has received prestigious scholarships and awards such as; awarded the Japanese government (MEXT, scholarship 1998-2004), Japan Society for the Promotion of Science fellow (JSPS June 2011-March 2012). In Malaysia awarded different medals in national and international levels such as ITEX, MTE, and PECIPTA for his significant contribution to cleaner environment.
Abstract: In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing both as several minerals and being produced synthetically. Notable examples include quartz, crystal, fumed silica, silica gel, and aero gels. Applications range from structural materials to microelectronics to components used in the food industry.
Silica exposure remains a serious threat to nearly 2 million U.S. workers, including more than 100,000 workers in high risk jobs such as abrasive blasting, foundry work, stonecutting, rock drilling, quarry work and tunneling. Crystalline silica has been classified as a human lung carcinogen. Additionally, breathing crystalline silica dust can cause silicosis, which in severe cases can be disabling, or even fatal. The respirable silica dust enters the lungs and causes the formation of scar tissues, thus reducing the lungs' ability to take in oxygen. There is no cure for silicosis. Since silicosis affects lung function, it makes one more susceptible to lung infections like tuberculosis. In addition, smoking causes lung damage and adds to the damage caused by breathing silica dust.
in water supply, silica can exist in a dissolved, particulate or colloidal form. A colloid is a very fine suspended particle which does not settle readily. In high enough concentrations, silica has a tendency to form scale deposits. This is especially true in high temperature boiler applications and in the power generation field where silica can deposit on turbine heads. Treatment for silica depends on the form it’s in. In the particulate form, silica can be removed by simple filtration. The colloidal form may require chemical addition such as magnesium salts followed by filtration or reverse osmosis (RO). In the dissolved form, RO and anion exchange work well, however anion exchange is not generally practiced in domestic applications as it requires caustic soda to strip the silica back off. Needless to say, silica removal is not as easy as it appears.
As contribution to solve the mentioned problems in industrial wastewater, coagulation and flocculation experiments were carried out to assess the ability of coagulant made mainly from paper sludge ashes (PSA) for the removal of high concentration colloidal silica wastes from microelectronics industry. Three different parameters were checked, pH, coagulant dosage, and temperature. High removal efficiency was obtained when pH was higher than 8, therefore no need to adjust pH before treatment since waste is produced with high pH values. The optimum coagulant dosage was 0.25 g of PSA per 1gram of silica at concentration of 1.8% colloidal silica. Temperature was carried out under mild conditions from (10-40 oC). Increasing the coagulant dose at 10 oC or lower could help to achieve clear effluent. Long-term operating data were gathered by using continuous flow system for treatment actual wastes. Average results obtained for the fluent for TN, TP, T. Si, COD, BOD and S.S were 11, < 1, < 50, 10, 12 < 50PPM, 16 PPM, and <100 PPM respectively which are comply with the most international environmental regulations.
Biography: Yassine HASSOUNI is an Head, Theoretical Physics Laboratory at Faculty of Science, UM5A, Morocco
Abstract: In this work we deal with Klauder’s approach, which is based on the construction of coherent states of the Heisenberg algebra. This algebra appears in many areas of modern theoretical physics and as an example we notice that the one-dimensional quantum oscillator algebra is an important tool in the second-quantization approach.
The Hamiltonian of the physical system under some consideration, in our context, belongs explicitly to the set of generators of the algebra, the other generators in this set being the step operators of the system.
The version of the Generalized Heisenberg Algebra (GHA) is written using a general function called the characteristic function of the algebra, which is connected with the energy spectrum ofthe physical system under consideration. It was shown that there is a class of quantum systems described by this GHA. This class is characterized by those quantum systems having energy eigenvalues written as successive energy levels and the characteristic function is a different function for each physical system.