Download or read book Periodic Mesoporous Organosilica and Silica written by Wendong Wang and published by . This book was released on 2011 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodic mesoporous material is a class of solids that possess periodically ordered pores with sizes of 2--50 nm. After a brief introduction to the synthesis, structure, property and function of periodic mesoporous materials in general in Chapter 1, a specific type of periodic mesoporous material, periodic mesoporous organosilica (PMO), is examined in detail in Chapter 2. Chapter 3 and Chapter 4 focus on the application of periodic mesoporous organosilica as low-dielectric-constant (low-k) insulating materials on semiconductor microprocessors. Specifically, Chapter 3 introduces a vapor-phase delivery technique, vacuum-assisted aerosol deposition, for the synthesis of PMO thin films; Chapter 4 studies one property crucial for the application of low-k PMO in detail--hydrophobicity. The focus of Chapter 5 turns to a novel sandwich-structured nanocomposite made of periodic mesoporous silica and graphene oxide. In Chapter 6, progress towards the synthesis of periodic mesoporous quartz is summarized. A conclusion and an outlook are given in Chapter 7.
Download or read book Periodic Mesoporous Organosilicas written by Chang-Sik Ha and published by Springer. This book was released on 2018-11-07 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the fundamental properties, preparation routes and applications of a novel class of organic–inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). Mesoporous silicas are amorphous inorganic materials which have silicon and oxygen atoms in their framework with pore size ranging from 2 to 50 nm. They can be synthesized from surfactants as templates for the polycondensation of various silicon sources such as tetraalkoxysilane. In general, mesoporous silica materials possess high surface areas, tunable pore diameters, high pore volumes and well uniformly organized porosity. The stable chemical property and the variable ability for chemical modification makes them ideal for many applications such as drug carrier, sensor, separation, catalyst, and adsorbent. Among such mesoporous silicas, in 1999, three groups in Canada, Germany, and Japan independently developed a novel class of organic–inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). The organic functional groups in the frameworks of these solids allow tuning of their surface properties and modification of the bulk properties of the material. The book discusses the properties of PMOs, their preparation, different functionalities and morphology, before going on to applications in fields such as catalysis, drug delivery, sensing, optics, electronic devices, environmental applications (gas sensing and gas adsorption), biomolecule adsorption and chromatography. The book provides fundamental understanding of PMOs and their advanced applications for general materials chemists and is an excellent guide to these promising novel materials for graduate students majoring in chemical engineering, chemistry, polymer science and materials science and engineering.
Download or read book Mesoporous Silica based Nanomaterials and Biomedical Applications written by and published by Academic Press. This book was released on 2018-09-20 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cancer Therapy and Diagnosis, Part A, Volume 43 in The Enzymes series, highlights new advances in the field, with this new volume presenting interesting chapters on Mesoporous silica nanoparticle synthesis, Periodic mesoporous organosilica, Nanovalves and other nanomachine-equipped nanoparticles and controlled release, Two-photon light control and photodynamic therapy, Biodegradable PMO nanoparticles, Cationic mesoporous silica and protein delivery, Drug loading, stimuli-responsive delivery and cancer treatment, Animal models and cancer therapy, siRNA delivery and TWIST shutdown for ovarian cancer treatment, and TBC (mesoporous silica nanoparticles and cancer therapy or biodistribution of MSN). Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in The Enzymes series Updated release includes the latest information on Cancer Therapy and Diagnosis
Download or read book Novel Periodic Mesoporous Silicas written by Krystyna Czechura and published by . This book was released on 2010 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Silica and Zeolite Based Materials written by Abderrazzak Douhal and published by Elsevier. This book was released on 2019-07-04 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry of Silica and Zeolite-Based Materials covers a wide range of topics related to silica-based materials from design and synthesis to applications in different fields of science and technology. Since silica is transparent and inert to the light, it is a very attractive host material for constructing artificial photosynthesis systems. As an earth-abundant oxide, silica is an ideal and basic material for application of various oxides, and the science and technology of silica-based materials are fundamentally important for understanding other oxide-based materials. The book examines nanosolvation and confined molecules in silica hosts, catalysis and photocatalysis, photonics, photosensors, photovoltaics, energy, environmental sciences, drug delivery, and health. Written by a highly experienced and internationally renowned team from around the world, Chemistry of Silica and Zeolite-Based Materials is ideal for chemists, materials scientists, chemical engineers, physicists, biologists, biomedical sciences, environmental scientists, toxicologists, and pharma scientists. --- "The enormous versatility of silica for building a large variety of materials with unique properties has been very well illustrated in this book.... The reader will be exposed to numerous potential applications of these materials – from photocatalytic, optical and electronic applications, to chemical reactivity in confined spaces and biological applications. This book is of clear interest not only to PhD students and postdocs, but also to researchers in this field seeking an understanding of the possible applications of meso and microporous silica-derived materials." - Professor Avelino Corma, Institute of Chemical Technology (ITQ-CSIC) and Polytechnical University of Valencia, Spain Discusses the most important advances in various fields using silica materials, including nanosolvation and confined molecules in silica hosts, catalysis and photocatalysis, and other topics Written by a global team of experts from a variety of science and technology disciplines Ideal resource for chemists, materials scientists, and chemical engineers working with oxide-based materials
Download or read book Synthesis and Applications of Novel Periodic Mesoporous Organosilicas written by Chun Xiang Lin and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanomaterials for Cancer Therapy written by Challa S. S. R. Kumar and published by Wiley-VCH. This book was released on 2006-07-24 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first comprehensive overview on nanotechnological approaches to cancer therapy brings together therapeutic oncology and nanotechnology, showing the various strategic approaches to selectively eliminating cancerous cells without damaging the surrounding healthy tissue. The strategies covered include magnetic, optical, microwave and neutron absorption techniques, nanocapsules for active agents, nanoparticles as active agents, and active and passive targeting, while also dealing with fundamental aspects of how nanoparticles cross biological barriers. A valuable single source gathering the many articles published in specialized journals often difficult to locate for members of the other disciplines involved.
Download or read book Modern Inorganic Synthetic Chemistry written by Ruren Xu and published by Elsevier. This book was released on 2017-02-11 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Inorganic Synthetic Chemistry, Second Edition captures, in five distinct sections, the latest advancements in inorganic synthetic chemistry, providing materials chemists, chemical engineers, and materials scientists with a valuable reference source to help them advance their research efforts and achieve breakthroughs. Section one includes six chapters centering on synthetic chemistry under specific conditions, such as high-temperature, low-temperature and cryogenic, hydrothermal and solvothermal, high-pressure, photochemical and fusion conditions. Section two focuses on the synthesis and related chemistry problems of highly distinct categories of inorganic compounds, including superheavy elements, coordination compounds and coordination polymers, cluster compounds, organometallic compounds, inorganic polymers, and nonstoichiometric compounds. Section three elaborates on the synthetic chemistry of five important classes of inorganic functional materials, namely, ordered porous materials, carbon materials, advanced ceramic materials, host-guest materials, and hierarchically structured materials. Section four consists of four chapters where the synthesis of functional inorganic aggregates is discussed, giving special attention to the growth of single crystals, assembly of nanomaterials, and preparation of amorphous materials and membranes. The new edition’s biggest highlight is Section five where the frontier in inorganic synthetic chemistry is reviewed by focusing on biomimetic synthesis and rationally designed synthesis. Focuses on the chemistry of inorganic synthesis, assembly, and organization of wide-ranging inorganic systems Covers all major methodologies of inorganic synthesis Provides state-of-the-art synthetic methods Includes real examples in the organization of complex inorganic functional materials Contains more than 4000 references that are all highly reflective of the latest advancement in inorganic synthetic chemistry Presents a comprehensive coverage of the key issues involved in modern inorganic synthetic chemistry as written by experts in the field
Download or read book Periodic Mesoporous Organosilica written by Steven Edward Dickson and published by . This book was released on 2011 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is currently a great interest in the field of porous organosilica materials because of the high surface areas (> 1000 m2/g) and narrow pore size distributions which are beneficial for applications such as chromatography, chiral catalysis, sensing or selective adsorption. Periodic mesoporous organosilicas (PMOs) represent an interesting class of hybrid silica materials because of the wide variety of bridging organic groups which can be incorporated within the precursors [(OR)3Si-R-Si(OR)3] giving rise to materials with exceptional properties. We have synthesized and characterized various aromatic PMOs composed of supporting structural monomers (phenylene- or biphenylenebridged) and functional stilbene monomers (cis and trans) (1, 2). The effect of the different synthetic procedures and varying amounts of functional stilbene monomer on the properties of the materials was examined. The functional transstilbene component was determined to be well distributed in a phenylene-bridged PMO using P123 as a pore template from TEM techniques with Os staining. The trans-stilbene linkers were completely transformed to aryl aldehydes through ozonolysis with dimethylsulfide workup. Further transformation of the carbonyl functionality to an aryl imine showed a moderate level of success. Enantiomeric forms of a novel, chiral PMO precursor (CM) were synthesized and incorporated into biphenylene-bridged PMOs. Under basic pH conditions templated with C18TMACl, although very low levels of CM are incorporated, enantiomeric forms of chiral, porous materials are obtained as was verified by distinct mirror-image circular dichroism spectra. Powder XRD patterns suggest that a tightly packed asymmetric biphenylene arrangement may be necessary for the optical activity. Preliminary results using these materials as a chiral chromatographic phase are promising. Finally, a thin film morphology of an ethane-bridged PMO incorporating a thiol ligand, (3-mercaptopropyl)trimethoxysilane, was prepared on a fibre optic cable and used as a component in a heavy-metal sensing application.
Download or read book Mesoporous Silica based Nanomaterials and Biomedical Applications Part B written by and published by Academic Press. This book was released on 2018-10-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cancer Therapy and Diagnosis, Part B, Volume 44 in The Enzymes series highlights new advances in the field, with this new volume presenting interesting chapters on Mesoporous silica nanoparticle synthesis, Periodic mesoporous organosilica, Nanovalves and other nanomachine-equipped nanoparticles and controlled release, Two-photon light control and photodynamic therapy, Biodegradable PMO nanoparticles, Cationic mesoporous silica and protein delivery, Drug loading, stimuli-responsive delivery and cancer treatment, Animal models and cancer therapy, siRNA delivery and TWIST shutdown for ovarian cancer treatment, and TBC (mesoporous silica nanoparticles and cancer therapy or biodistribution of MSN).
Download or read book Mechanical and Dielectric Properties of Self assembled Periodic Nanoporous Silica and Organosilica Materials microform written by Hatton, Benjamin D. (Benjamin David) and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years self-assembled, organic supramolecular or colloidal arrays have been used as templates for the design of a wide range of novel nanostructured porous materials, using sol-gel chemistry. Herein, mesoporous silica and organosilica films, and colloidal crystal (opal) films, have been synthesized, and various mechanical and dielectric properties investigated. Highly-ordered, periodic mesoporous organosilica (PMO) thin films were synthesized from bridged silsesquioxane precursors of the type (EtO) 3SiRSi(OEt)3 (where R is an organic group), and a novel three-ring [(EtO)2Si(CH2)]3 precursor. Detailed structural characterization has been performed using PXRD, SAXS, SEM, and TEM. PMO films may have important applications as low dielectric constant (k) materials in microelectronics. Capacitance measurements showed that k decreased with organic content to & sim;1.8. A novel 'self-hydrophobization' behaviour has been demonstrated, using a bridge-terminal transformation of the organic groups at 400--550°C, to lower k and make the films highly resistant to moisture adsorption. A series of novel dendrimer and 'semi-dendrimer' PMO thin films have been synthesized using cationic and block copolymer templates, to further increase the organic content. As a result, the number of organic bridges attached to each Si is increased as a series, from 0 to 4.A series of spin-coated mesoporous silica films were synthesized using a surfactant template, using evaporation-induced self-assembly (EISA). The porosity was controlled by the surfactant/silica molar ratio, thermally-induced collapse at 300--900°C, and deposition within the channels. The Young's modulus (E) and hardness (H) were measured using nanoindentation, and the results have been compared with conventional models for porous materials. A series of molecular mechanics atomic models of mesoporous silica were used to simulate the elastic and plastic deformation as a function of pore diameter. Finally, chemical vapour deposition (CVD) was used to sinter silica opal films to systematically control the optical Bragg diffraction and the structural connectivity. SiCl4 and Si(OMe)4 vapour were used to deposit silica layers to grow necks between silica spheres. Nanoindentation was used to measure E and H as a function of the silica deposition.
Download or read book Supported Ionic Liquids written by Rasmus Fehrmann and published by John Wiley & Sons. This book was released on 2014-03-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book gives a timely overview about the fundamentals and applications of supported ionic liquids in modern organic synthesis. It introduces the concept and synthesis of SILP materials and presents important applications in the field of catalysis (e.g. hydroformylation, hydrogenation, coupling reactions, fine chemical synthesis) as well as energy technology and gas separation. Written by pioneers in the field, this book is an invaluable reference book for organic chemists in academia or industry.
Download or read book Synthesis and Characterization of Periodic Mesoporous Organosilica Materials written by Alufelwi Maxwell Tshavhungwe and published by . This book was released on 2005 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pore Control in Mesoporous Silica for Cargo Delivery and Sensing Applications written by Melissa Mei-Lee Russell and published by . This book was released on 2013 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mesoporous silica materials can range from films to nanoparticles. Due to the Si-OH groups on the surface of the materials they can be functionalized to control the pore openings. Some examples of these functionalizations are the attachment of polymers or molecules that serve as a pore cap. This leads to a wide variety of applications because of their ability to contain cargo molecules. The work covered in this thesis focuses on the development of different mesoporous silica materials for the purpose of trapping various cargo molecules for cargo delivery and sensing applications. The first project discusses the thermal trapping and release of cargo molecules of a mesoporous silica film with a thermal sensitive polymer attached to the surface. The second project focuses on a light activated polymer attached to MCM-41 silica nanoparticles and the delivery of fluorescent molecules inside of cells. The third project discussed in this thesis utilizes hollow mesoporous silica nanoparticles to crystalize a perchlorate sensor inside the core to be used as "smart sand" for perchlorate detection. The last project focuses on periodic mesoporous organosilica (PMO) nanoparticles and their ability to trap and release cargo molecules. This research demonstrates the versatility of mesoporous silica materials and its potential in both microscopic and macroscopic applications.
Download or read book Synthesis of Periodic Mesoporous Silica Thin Films written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanoporous Materials III written by M. Jaroniec and published by Elsevier. This book was released on 2002-05-15 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoporous Materials III contains the invited lectures and peer-reviewed oral and poster contributions to be presented at the 3rd Conference on Nanoporous Materials, which will be hosted in Ottawa, Canada, June 2002. The work covers complementary approaches to and recent advances in the field of nanostructured materials with pore sizes larger than 1nm, such as periodic mesoporous molecular sieves M41S and FSM16 and related materials including clays, carbon molecular sieves, colloidal crystal templated organic and inorganic materials, porous polymers and sol gels. The broad range of topics covered in relation to the synthesis and characterization of ordered mesoporous materials are of great importance for advanced adsorption, catalytic and separation processes as well as the development of nanotechnology. The contents of this title are based on topics to be discussed by invited lecturers, which deal with periodic mesoporous organosilicas, stability and catalytic activity of aluminosilicate mesostructures, electron microscopy studies of ordered materials, imprinted polymers and highly porous metal-organic frameworks. The other contributions deal with tailoring the surface and structural properties of nanoporous materials, giving a detailed characterization as well as demonstrating their usefulness for advanced adsorption and catalytic applications.
Download or read book Periodic Mesoporous Silica Gels written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
