Download or read book Silica Coated Nanocomposites written by Masih Darbandi and published by . This book was released on 2007 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Silica Coated Nanocomposites written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses on the development of colloidal synthetic approaches for silica encapsulation of nanocrystals as well as synthesis of hollow silica nanospheres and one-pot synthesis of silica coated nanocomposites. A series of experiments was performed which different nanoparticles were silica coated via microemulsion rout. The nanocomposites prepared were characterized by TEM, EDAX, SAED, XRD, absorption and luminescence spectroscopy. Luminescent semiconductor nanocrystals attracted increasing interest over the past several years, because of their intrinsic and size dependent optical properties. There has been a tremendous focus on the potential applications of these particles in areas such as tunable LEDs, QD lasers, luminescent materials and biolabeling. However, highly luminescent and photostable CdSe/ZnS core/shell quantum dots are not water dispersible because of their hydrophobicity. In the present work to create water dispersible quantum dots by an appropriate surface functionalization, monodispersed silica-coated CdSe/ZnS were synthesized by using the W/O microemulsion of NP-5/ Cyclohexan/ Water system. By hydrolysis of TEOS with ammonia in the presence of QDs, the silica coated nanoparticles were obtained in the microemulsion. In the composite nanoparticle, only single QD was located at the center of a spherical silica particle. The thickness of silica layer was 15 nm. Elucidating the coating mechanism was attempted. Possible mechanisms include a phase transfer by ligand exchange and a surfactant-supported mechanism. It was not possible to elucidate the encapsulation mechanism completely, but the experimental results point in the direction of a ligand-exchange/phase-transfer mechanism. I believe I have developed a simple general approach for creating nanocomposites with complex morphologies which can be used for a variety of materials, such as CdSe, etc. Therefore for prove this generality PbSe and YV(0.7)P(0.3)O4:Eu3+, Bi3+ has been chosen for e.

Download or read book Novel Nanomaterials written by George Kyzas and published by BoD – Books on Demand. This book was released on 2018-04-18 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Nanomaterials" is a special topic of recent research and is a milestone of nanoscience and nanotechnology. Nanoscale materials are a series of substances/compounds, in which at least one dimension has smaller size than 100 nm. Nanomaterials have a broad area of development, which is growing rapidly day by day. Their impact on commercial applications as well as on the respective academia and education is huge. The basic points of this book can be divided into synthesis of nanomaterials and their applications. For example, special mention is about metal-oxide nanostructures, nanocomposites, and polymeric nanomaterials. Also, synthesis, characterizations, various processes, fabrications and some promising applications are also developed and analyzed.

Download or read book Polymer Layered Silicate and Silica Nanocomposites written by Y.C. Ke and published by Elsevier. This book was released on 2005-07-13 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer-Layered Silicate and Silica Nanocomposites includes advanced materials and nanocomposites based on silica and layered silicates obtained from resources in China. Using nanotechnology, these inorganic materials can be filled, in-situ polymerised and combined with polymers with nanoscale dispersions. In this book, many practical examples are presented to show how to prepare the nanocomposites. Several kinds of polymer (PET,PBT,PE,PP,etc.)-layered silicate and silica nanocomposites are prepared and investigated based on our research works, inventions and applications. They are prepared and modified aiming at their applications to such fields as, functional films, barrier materials, coatings, and engineering plastics. Their structure-property relationship, especially the nano effects from them are investigated under different techniques to show how the critical load of the inorganic phase has the effect on the final properties of the nanocomposite materials. Obviously, this new generation of materials has revolutionary effects on the traditional materials or industry as petroleum. Some of the prospects of them are thus included. - Focus on the inorganic phase, which is of wide practical and industrial significance - Dealing with many first report of the nanoeffect, nanostructure and its functional properties - Especially, it covers the particle assembly and self-assemble by interaction with polymer matrix

Download or read book Silica based Organic inorganic Hybrid Nanomaterials Synthesis Functionalization And Applications In The Field Of Catalysis written by Rakesh Kumar Sharma and published by World Scientific. This book was released on 2019-11-05 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Currently the field of nanocatalysis is undergoing many exciting developments and the design of silica-based organic-inorganic hybrid nanocatalysts is a key focus of the researchers working in this field.This book aims to present a succinct overview of the recent research progress directed towards the fabrication of silica-based organic-inorganic hybrid catalytic systems encompassing the key advantages of silica nanoparticles and silica-coated magnetic nanoparticles in an integrated manner. Featuring comprehensive descriptions of almost all approaches utilized for the synthesis of nanomaterials including some latest techniques such as flow and microwave-assisted synthesis that enable large-scale synthesis, it proves useful not only to academics but also industrialists. It also includes a systematic discussion on the vital characterization techniques employed for authenticating the structure of these.The title also offers an enormous amount of knowledge about the fusion of nanotechnology with green chemistry that strives to meet the scientific challenges of protecting human health and the environment.

Download or read book Silica and Clay Dispersed Polymer Nanocomposites written by Md Rezaur Rahman and published by Woodhead Publishing. This book was released on 2018-06-13 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of 'polymer nanocomposites' has recently gained considerable attention from both the academic and industrial community, especially in the area of nanoscience. This is mainly due to their enhanced improvements in physico-mechanical, thermal and barrier properties compared to micro and more conventional composites. Their nanoscale dimensions, biodegradable character, cost-effectiveness and sustainability have constituted a stimulus for this increasing interest. Currently there is no limit to the possibility of applications. However, despite all this progress, it is still difficult to achieve uniform dispersion between the filler and the matrix, as agglomerations form far too easily and the production of polymer nanocomposites with high mechanical and thermal properties is still limited. The authors of this proposed book, are of the opinion, that with the increase in scientific publications and the rapid progress in processing possibilities to produce nanocomposites based on various nanoscale fillers (silica/clay), a book that collects all of these scientific findings in one place would be timely and of great interest to both students and scientific researchers, who are concerned with the production, and application of nanocomposites as new innovative materials. The authors aim is to present the latest research findings on the fabrication, properties and applications of nanofillers as reinforcement in polymer nanocomposites. Particular emphasis will be placed on the introduction of various nanofillers (silica/clay) into different elastomeric polymer matrices that will enhance the properties of these materials and their applications. The book will provide an up-to-date review of major innovations in the field and act as a reference for future research in materials science and engineering, which is highly topical due to the demand to produce more sustainable and eco-friendly innovative advanced materials from elastomeric polymers. - Emphasis on silica/clay as outstanding reinforcing potential in elastomeric polymer matrices - Up-to-date on the most relevant innovations in the field of silica/clay nanocomposites and their extensive applications in advanced material science - Establishes the most suitable fabrication methods, properties and applications as a solid foundation in materials science and engineering disciplines - Includes the incorporation of dual nanofillers that significantly improve the properties of nanocomposites

Download or read book Nanosynthesis Techniques of Silica Coated Nanostructures written by Kwok Wei Shah and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Core-shell nanomaterials are fast-emerging hybrid nanocomposites in area of nanotechnology, materials science and biochemistry, which are fast attracting research attention. Nanostructured nanomaterials are utilized in wide industry fields such as electronics, biopharmaceutical, biomedicine, optics and biocatalysis. Owing to the additional exterior shell-coating material, the primary core material's functionality, biocompatibility, chemical stability and colloidal dispersibility can be greatly enhanced. Silica, in particular, is found to be an excellent exterior shell-coating material, has been widely researched for the synthesis of core-shell nanocomposite materials. So far, there have been numerous publications devoted to silica-coating techniques using hydrophobic silanes, such as tetraethylorthosilicate (TEOS) or tetramethyl orthosilicate (TMOS), via the classic Stober method. Recently, there has been strong interest in the use of water-soluble silanes such as MPTMS (3-(mercaptopropyl)-trimethoxysilane), MPTES (3-(mercaptopropyl-triethoxysilane), MTMS (3-(methyltrimethoxysilane)) and sodium silicate for water-based silica-coating techniques have gained much attention, due to the fast-growing need to focus on process simplicity, large-scale fabrication and environmental-friendly synthesis techniques of silica-based core-shell nanomaterials. Hence, this chapter focuses on the recent development on silica-coating techniques for colloidal nanoparticles, particularly on water-based techniques and morphologies. In summary, we emphasize the importance of advanced nanomaterials in today's world and envisage there will be more breakthrough research on aqueous silica-coating techniques for silica-encapsulated core-shell nanomaterials.

Download or read book Silica Coated BaTiO3 P VDF CTFE Nanocomposites for Electrical Energy Storage written by Wuttichai Reainthippayasakul and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The nanocomposites of ferroelectric polymers with ceramic nanoparticles are considered to be fascinating materials for electrical energy storage applications owing to the combination of their benefits. Ceramic nanofillers, like BaTiO3 nanoparticles, can offer high dielectric permittivity, while ferroelectric polymer, like poly(vinylidene fluoride-co-chlorotrifluoroethylene) or P(VDF-CTFE), can provide high breakdown strength, lightweight, good flexibility and processability. In order to improve the compatibility and energy storage properties of the nanocomposites, the surface modification of the nanoparticles is a crucial role. The core-shell particle/polymer nanocomposites consisting of silica-coated BaTiO3 (BT@SiO2) nanoparticles as dielectric fillers and P(VDF-CTFE) as ferroelectric polymer matrix could be successfully fabricated by solution casting method. The BT@SiO2/P(VDF-CTFE) nanocomposites clearly exhibit improved dielectric properties and electrical breakdown strength compared to the pristine polymer and the nanocomposites with unmodified BT nanoparticles. The enhancement in dielectric properties of the nanocomposites is attributed to the introduction of BaTiO3 nanoparticles, whereas the improvement of breakdown field has been rationalized on the effects of insulating silica shells by increasing the electrical resistivity and mechanical strength of the materials. These developments confirm that the nanocomposites of ferroelectric polymers with silica-coated nanoparticles can be decent materials for energy storage devices.

Download or read book Cutting Edge Enabling Technologies for Regenerative Medicine written by Heung Jae Chun and published by Springer. This book was released on 2018-10-24 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores in depth the latest enabling technologies for regenerative medicine. The opening section examines advances in 3D bioprinting and the fabrication of electrospun and electrosprayed scaffolds. The potential applications of intelligent nanocomposites are then considered, covering, for example, graphene-based nanocomposites, intrinsically conductive polymer nanocomposites, and smart diagnostic contact lens systems. The third section is devoted to various drug delivery systems and strategies for regenerative medicine. Finally, a wide range of future enabling technologies are discussed. Examples include temperature-responsive cell culture surfaces, nanopatterned scaffolds for neural tissue engineering, and process system engineering methodologies for application in tissue development. This is one of two books to be based on contributions from leading experts that were delivered at the 2018 Asia University Symposium on Biomedical Engineering in Seoul, Korea – the companion book examines in depth novel biomaterials for regenerative medicine.

Download or read book Nanocomposite Particles for Bio Applications written by Tito Trindade and published by CRC Press. This book was released on 2011-08-08 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a concise state of the art of the synthesis and properties of nanocomposite particles with interest for diverse bio-applications. Contributions are mainly related to the chemical design of nanocomposite particles, their properties as well as their constituent materials, and the tailoring of bio-interfaces that may be relevant to the fields of clinical diagnosis and drug delivery procedures, among other bio-applications.

Download or read book Inorganic Rganic Elastomer Nanocomposites from Integrated Ellipsoidal Silica coated Hematite Nanoparticles as Crosslinking Agents written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the synthesis of nanocomposites with integrated ellipsoidal silica-coated hematite (SCH) spindle type nanoparticles which can act as crosslinking agents within an elastomeric matrix. Influence of the surface chemistry of the hematite, leading either to dispersed particles or crosslinked particles to the elastomer matrix, was studied via swelling, scattering and microscopy experiments. It appeared that without surface modification the SCH particles aggregate and act as defects whereas the surface modified SCH particles increase the crosslinking density and thus reduce the swelling properties of the nanocomposite in good solvent conditions. For the first time, inorganic SCH particles can be easily dispersed into a polymer network avoiding aggregation and enhancing the properties of the resulting inorganic- rganic elastomer nanocomposite (IOEN).

Download or read book Nanocomposite Coatings and Nanocomposite Materials written by Andreas Öchsner and published by Trans Tech Publications Ltd. This book was released on 2009-02-11 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters BCI (WoS). Nanocomposite materials are formed by mixing two or more dissimilar materials at the nanoscale in order to control and develop new and improved structures and properties. The properties of nanocomposites depend not only upon the individual components used but also upon the morphology and the interfacial characteristics. Nanocomposite coatings and materials are among the most exciting and fastest-growing areas of research; with new materials being continually developed which often exhibit novel properties that are absent in the constituent materials. Nanocomposite materials and coatings therefore offer enormous potential for new applications including: aerospace, automotive, electronics, biomedical implants, non-linear optics, mechanically reinforced lightweight materials, sensors, nano-wires, batteries, bioceramics, energy conversion and many others.

Download or read book Silicon Based Hybrid Nanoparticles written by Sabu Thomas and published by Elsevier. This book was released on 2021-09-24 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon-Based Hybrid Nanoparticles: Fundamentals, Properties, and Applications focuses on the fundamental principles and promising applications of silicon-based hybrid nanoparticles in nanoelectronics, energy storage/conversion, catalysis, sensors, biomedicine, environment and imaging. This book is an important reference source for materials scientists and engineers who are seeking to understand more about the major properties and applications of silicon-based hybrid nanoparticles. As the hybridization of silicon nanoparticles with other semiconductors or metal oxides nanoparticles may exhibit superior features, when compared to lone, individual nanoparticles, this book provides the latest insights. In addition, the silicon/iron oxide hybrid nanoparticles also possess excellent fluorescence, super-paramagnetism, and biocompatibility that can be effectively used for the diagnostic imaging system in vivo. Similarly, gold-silicon nanohybrids could be used as highly efficient near-infrared hyperthermia agents for cancer cell destruction. - Outlines the major thermal, electrical, optical, magnetic and toxic properties of silicon-based hybrid nanoparticles - Describes major applications in energy, environmental science and catalysis - Assesses the major challenges to manufacturing silicon-based nanostructured materials on an industrial scale

Download or read book Polymer Nanocomposite Films and Coatings written by Mayank Pandey and published by Elsevier. This book was released on 2024-01-22 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Nanocomposite Films and Coatings: Processes, Fundamental Properties and Applications presents a comprehensive review on the fundamental chemistry, physics, biology and engineering aspects of polymer nanocomposite films and coatings.The content of the book covers design configuration, synthesis and processing methods, structure, fundamental properties, and a wide range of applications in diverse research fields. Various unresolved issues and new technical challenges regarding regulatory affairs, safety considerations and environmental and health impact are also discussed in detail.The book will be a valuable reference resource for scientists, engineers, and postgraduate students, working in the field of polymer composites and nanocomposites helping them to find solutions to both fundamental and applied problems associated with this important research field. - Presents recent research developments in the synthesis, processing, functionalization, and properties of polymer nanocomposite films and coatings - Covers applications in electronics and optoelectronic devices, sensors and actuators, solar energy, food packaging, anticorrosion, anti-wear, antifouling, electromagnetic interference shielding, dielectric, aerospace, and textile industries as well as in biomedical fields for antibacterial, antifungal, and drug delivery applications - Includes comprehensive coverage with a global, internationally recognized author-base

Download or read book Nanocomposite Science and Technology written by Pulickel M. Ajayan and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, nanocomposites have captured and held the attention and imagination of scientists and engineers alike. Based on the simple premise that by using a wide range of building blocks with dimensions in the nanosize region, it is possible to design and create new materials with unprecedented flexibility and improvements in their physical properties. This book contains the essence of this emerging technology, the underlying science and motivation behind the design of these structures and the future, particularly from the perspective of applications. It is intended to be a reference handbook for future scientists and hence carries the basic science and the fundamental engineering principles that lead to the fabrication and property evaluation of nanocomposite materials in different areas of materials science and technology.

Download or read book Sol Gel Nanocomposites written by Massimo Guglielmi and published by Springer. This book was released on 2014-07-05 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides comprehensive coverage of nanocomposite materials obtained by the sol-gel method, from synthesis to applications and including design tools for combining different properties. Sol-gel nanocomposites are of great interest in meeting processing and application requirements for the development of multifunctional materials. These materials are already commercialized for a number of applications from scratch-resistant and anti-adhesive coatings to optical materials with active and passive properties. Biomedical applications, holographic recordings, fuel cells and hydrogen storage, resists and catalysts are among the potential uses. The novel mechanical, optical and electronic properties of nanocomposite materials depend not only on the individual component materials, but also on their morphology and nanoscale interfacial characteristics. Sol-gel is a highly versatile method for obtaining both the matrix and the filler of the nanocomposite and for chemically adjusting the interface to optimize structure and properties. Although nanocomposites are widely discussed in the literature, the focus has been mainly on polymer nanocomposites. This book addresses nanocomposites based on inorganic or hybrid organic-inorganic matrices, with an emphasis on the scientific principles which are the basis for nanocomposite sol-gel synthesis and applications. A didactic approach is followed, with different topics developed from a fundamental point of view together with key examples and case studies. First comprehensive treatment of nanocomposites obtained by sol-gel methods Focuses on nanocomposites with inorganic and hybrid organic-inorganic matrices Describes design tools to optimize structure and properties for various applications Covers synthesis, processing, characterization, and modeling Uses first principles to describe the influence of interfacial characteristics on materials properties Presents case studies for both films and bulk applications Provides examples of products on the market, with descriptions of the scientific principles at the base of their success Includes contributions from recognized leaders in this multidisciplinary area.

Download or read book Nanomaterials and Polymer Nanocomposites written by Niranjan Karak and published by Elsevier. This book was released on 2018-10-24 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials and Polymer Nanocomposites: Raw Materials to Applications brings together the most recent research in nanoparticles and polymer nanocomposites for a range of applications. The book's coverage is comprehensive, starting with synthesis techniques, then moving to characterization and applications of several different classes of nanomaterial and nanoparticle in nanocomposites. By presenting different nanomaterials, such as metal and metal oxides, clay and POSS, carbon nanotubes, cellulose and bio-based polymers in a structured manner, the book enables an efficient comparison of properties and capabilities for these advanced materials, making it relevant both for researchers in an academic environment and also industrial R&D. This book is particularly distinctive because it centers on the raw materials on which the nanocomposites are based, the biological properties of the range of materials discussed, and the environmental and economic considerations of different polymer systems. - Presents a thorough, up-to-date review of the latest advances and developments in the field of nanomaterials and polymer nanocomposites, with a particular focus on raw materials - Includes comprehensive coverage from historical backgrounds, synthesis techniques, characterization, and a detailed look at new and emerging applications for polymer nanocomposites - Provides a range of different material classes, including metal and metal oxides, biopolymers, graphene and cellulose, among others