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Diffusion And Defects In Tio2
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Book Synopsis Diffusion and Defects in TiO2 by : David J. Fisher
Download or read book Diffusion and Defects in TiO2 written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2013-08-30 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide, already used millennia ago as a medicine and as an adjunct to brass production, has assumed a new importance in the modern world because of its native n-type semiconducting properties. It has, for instance, a relatively large (3.3eV) band-gap at room temperature. This leads to higher breakdown voltages, resistance to high electric fields, lower electronic noise and superior performance at high temperatures and powers. The band-gap can also be tailored by alloying with magnesium or cadmium oxides. The material exhibits other useful properties, such as a good transparency, a high electron mobility and a strong room-temperature luminescence; all of which are invaluable to the manufacture of the liquid-crystal displays of modern consumer goods. The present compilation comprises nearly 500 accounts of research on the diffusional behaviour of dopants and on the defects present in the wurtzite or zincblende structures. It is hoped that this handy compendium of data will be of value to those working on the tailoring of ZnO properties; especially with regard to the controversies concerning its doping behaviour.
Download or read book Diffusion and Defects in TiO2 written by and published by . This book was released on 2013 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide, already used millennia ago as a medicine and as an adjunct to brass production, has assumed a new importance in the modern world because of its native n-type semiconducting properties. It has, for instance, a relatively large (3.3eV) band-gap at room temperature. This leads to higher breakdown voltages, resistance to high electric fields, lower electronic noise and superior performance at high temperatures and powers. The band-gap can also be tailored by alloying with magnesium or cadmium oxides. The material exhibits other useful properties, such as a good transparency, a high electron mobility and a strong room-temperature luminescence; all of which are invaluable to the manufacture of the liquid-crystal displays of modern consumer goods. The present compilation comprises nearly 500 accounts of research on the diffusional behaviour of dopants and on the defects present in the wurtzite or zincblende structures. It is hoped that this handy compendium of data will be of value to those working on the tailoring of ZnO properties; especially with regard to the controversies concerning its doping behaviour. Review from Book News Inc.: Paragraph-long abstracts of 451 articles describe diffusion and defects in the naturally occurring oxide known variously as titanium dioxide, titanium(IV) oxide, and titania. They are arranged in topical sections on diffusion, conductivity, electromigration, dislocations, grain boundaries, planar defects, point defects, stacking faults, surface defects, surface reconstruction, and twins. A few tables and graphs are included.
Book Synopsis Solid State Chemistry and Photocatalysis of Titanium Dioxide by : Maria K. Nowotny
Download or read book Solid State Chemistry and Photocatalysis of Titanium Dioxide written by Maria K. Nowotny and published by Trans Tech Publications Ltd. This book was released on 2010-06-07 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters BCI (WoS). The goal of this special volume was to provide a unique opportunity to exchange information, to present the latest results and to review relevant issues affecting contemporary diffusion research. The large number (over 232) of peer-reviewed papers emphasizes the considerable academic and industrial interest in this field.
Book Synopsis Defects and Diffusion Ceramics Abstracts by : David J. Fisher
Download or read book Defects and Diffusion Ceramics Abstracts written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2006-03-15 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eighth volume in the series covering the latest results in the field includes abstracts of papers which appeared between the publication of Annual Retrospective VII (Volumes 242-244) and the end of June 2006 (journal availability permitting).
Book Synopsis New Mechanisms for Defect Engineering in Titanium Dioxide by : Alice G. Hollister
Download or read book New Mechanisms for Defect Engineering in Titanium Dioxide written by Alice G. Hollister and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The technologically useful properties of a solid often depend upon the types and concentrations of crystalline defects it contains. The concentrations of various defects can alter the electrical properties of a solid. Currently, defect engineering is applied extensively within the microelectronic industry but has not been utilized much in catalysis research. However, defects can be useful in altering the effectiveness of catalysts (including photocatalysts), the performance of photo-active devices, the sensitivity of solid-state electrolyte sensors, and the efficiency of devices for converting sunlight to electrical power. TiO2, in particular, is widely used as a catalyst and photocatalyst and is being explored for applications in sensor technology and coatings. This thesis involves identifying new mechanisms for defect engineering in titanium dioxide based on surface-bulk coupling, photo-stimulation, and interaction of charged defects at the surface. While titanium dioxide is utilized as a model, the principles observed for titanium dioxide will translate well into other metal oxide semiconductors. Through isotopic oxygen bulk diffusion studies done in an ultrahigh vacuum chamber, it has been observed that having a surface free from contamination increases the self-diffusion of oxygen in titanium dioxide. Photo-illumination effects were also observed for the defects in titanium dioxide. In addition an 18O pile-up in dopant concentration at the surface is evidence of an interaction between charged defects and the charged surface. Two models have been developed to help understand these mechanisms.
Download or read book Diffusion and Defect Data written by and published by . This book was released on 2003 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Defects and Diffusion in Ceramics XIII by : David J. Fisher
Download or read book Defects and Diffusion in Ceramics XIII written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2012-09-19 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasingly pressing requirements of environmental and natural resource protection, while achieving sustainable development, bring more opportunities to the fields of civil engineering, architecture, hydraulic engineering and infrastructure development. This book highlights the latest developments in, and applications of, advanced and sustainable materials, innovations in civil and hydraulic engineering, innovations in architecture and building construction, and innovations in bridge and underground engineering.
Book Synopsis Solid State Chemistry and Photocatalysis of Titanium Dioxide by : Maria K. Nowotny
Download or read book Solid State Chemistry and Photocatalysis of Titanium Dioxide written by Maria K. Nowotny and published by Trans Tech Publication. This book was released on 2010 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this special volume was to provide a unique opportunity to exchange information, to present the latest results and to review relevant issues affecting contemporary diffusion research. The large number (over 232) of peer-reviewed papers emphasizes the considerable academic and industrial interest in this field.
Book Synopsis Charged Semiconductor Defects by : Edmund G. Seebauer
Download or read book Charged Semiconductor Defects written by Edmund G. Seebauer and published by Springer Science & Business Media. This book was released on 2008-11-14 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defects in semiconductors have been studied for many years, in many cases with a view toward controlling their behaviour through various forms of “defect engineering”. For example, in the bulk, charging significantly affects the total concentration of defects that are available to mediate phenomena such as solid-state diffusion. Surface defects play an important role in mediating surface mass transport during high temperature processing steps such as epitaxial film deposition, diffusional smoothing in reflow, and nanostructure formation in memory device fabrication. “Charged Defects in Semiconductors” details the current state of knowledge regarding the properties of the ionized defects that can affect the behaviour of advanced transistors, photo-active devices, catalysts, and sensors. Features: group IV, III-V, and oxide semiconductors; intrinsic and extrinsic defects; and, point defects, as well as defect pairs, complexes and clusters.
Book Synopsis Nanostructured Photocatalyst via Defect Engineering by : Vitaly Gurylev
Download or read book Nanostructured Photocatalyst via Defect Engineering written by Vitaly Gurylev and published by Springer Nature. This book was released on 2021-10-28 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book helps readers comprehend the principles and fundamentals of defect engineering toward realization of an efficient photocatalyst. The volume consists of two parts, each of which addresses a particulate type of defects. The first, larger section provides a comprehensive and rigorous treatment of the behaviour and nature of intrinsic defects. The author describes how their controlled introduction and consequent manipulation over concentration, distribution, nature and diffusion is one of the most effective and practical methodologies to modify the properties and characteristics of target photocatalytic materials. The second part of the book explains the formation of extrinsic defects in the form of metallic and non-metallic dopants and gives a detailed description of their characteristics as this approach is also often used to fabricate an efficient photocatalyst. Filling the gap in knowledge on the correlation between introduction of defects in various semiconducting materials and their photocatalytic performance, the book is ideal for graduate students, academics and researchers interested in photocatalysts, defect engineering, clean energy, hydrogen production, nanoscale advanced functional materials, CO2 deactivation, and semiconductor engineering.
Book Synopsis Concentration Dependent Diffusion of H(+) in TiO2: Analysis of Electronic Effects in Ionic Diffusion by : O. W. Johnson
Download or read book Concentration Dependent Diffusion of H(+) in TiO2: Analysis of Electronic Effects in Ionic Diffusion written by O. W. Johnson and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion of charged impurities or defects in a non-metallic crystal generally results in changes in the electron Fermi level relative to the lattice energy bands and impurity levels, thus producing substantial internal electric fields. These fields in turn exert a force on the diffusing ion, hence modifying the diffusion process. A self-consistent treatment describing such diffusion processes in materials with band gap = or> 1.5 eV is developed. The problem of interdiffusion of two similar ions (as in an isotope exchange experiment) is also analyzed. Detailed calculations for both single ion diffusion and interdiffusion of H and D in TiO2 are presented. Experiments leading to accurate determination of the field-free diffusion parameters for H in TiO2, both by the isotope exchange technique and by ionic conductivity measurements, are reported. In addition, single diffusion measurements have been carried out. Criteria for applicability of our analysis are discussed, as well as the relationship of this analysis to previous, more restricted treatments of the internal field problem. (Modified author abstract).
Book Synopsis Defect Disorder, Semiconducting Properties and Chemical Diffusion of Titanium Dioxide Single Crystal by : Maria Nowotny
Download or read book Defect Disorder, Semiconducting Properties and Chemical Diffusion of Titanium Dioxide Single Crystal written by Maria Nowotny and published by . This book was released on 2006 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diffusion of H and D in TiO2: Suppression of Internal Fields by Isotope Exchange by : O. W. Johnson
Download or read book Diffusion of H and D in TiO2: Suppression of Internal Fields by Isotope Exchange written by O. W. Johnson and published by . This book was released on 1974 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of H and D diffusion in TiO2, using the isotope exchange technique described in the preceding paper, are reported. Use of this technique resulted in diffusion which was accurately described by Fick's law, as predicted theoretically, in sharp contrast to single ion diffusion, where dramatic departures from classical diffusion theory were observed. Ionic conductivity measurements are reported, which agree well with the bulk diffusion measurements, and permit extension of the temperature range of the measurements for c-axis diffusion from 125 to 750C, corresponding to a range of more than 4 orders of magnitude in D. The measured diffusion parameters were found to be essentially independent of sample purity, although it was observed that significant concentrations of lattice defects sharply inhibited H diffusion. (Modified author abstract).
Book Synopsis Oxide Semiconductors for Solar Energy Conversion by : Janusz Nowotny
Download or read book Oxide Semiconductors for Solar Energy Conversion written by Janusz Nowotny and published by CRC Press. This book was released on 2016-04-19 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide semiconductors, including titanium dioxide (TiO2), are increasingly being considered as replacements for silicon in the development of the next generation of solar cells. Oxide Semiconductors for Solar Energy Conversion: Titanium Dioxide presents the basic properties of binary metal oxide semiconductors and the performance-related properties
Book Synopsis Defects and Surface-Induced Effects in Advanced Perovskites by : Gunnar Borstel
Download or read book Defects and Surface-Induced Effects in Advanced Perovskites written by Gunnar Borstel and published by Springer Science & Business Media. This book was released on 2000-03-31 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex oxide materials, especially the ABO3-type perovskite materials, have been attracting growing scientific interest due to their unique electro-optical properties, leading to photorefractive effects that form the basis for such devices as holographic storage, optical data processing and phase conjugation. The optical and mechanical properties of non-metals are strongly affected by the defects and impurities that are unavoidable in any real material. Nanoscopically sized surface effects play an important role, especially in multi-layered ABO3 structures, which are good candidates for high capacity memory cells. The 51 papers presented here report the latest developments and new results and will greatly stimulate progress in high-tech technologies using perovskite materials.
Book Synopsis Black Tio2 Nanomaterials For Energy Applications by : Xiaobo Chen
Download or read book Black Tio2 Nanomaterials For Energy Applications written by Xiaobo Chen and published by World Scientific. This book was released on 2016-12-08 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'This book not only provides a fundamental technical background on black TiO2 and the synthesis of this material, it also covers state-of-the-art applications and will provide the reader with current information on property behavior and show the direction of the latest research for this interesting material for energy applications.'IEEE Electrical Insulation MagazineThe transformation of titanium dioxide (TiO2) nanomaterials from white to black using disorder engineering has meant a dramatic increase in their performance in photocatalytic experiments. The efficiency with which black TiO2 nanomaterials can use sunlight to split water molecules for the production of hydrogen is significantly improved compared to using white crystals, and this pure hydrogen can then be used in batteries and fuels. The black TiO2 nanomaterials are also very promising in CO2 conversion, water treatment, and in air quality control.This book aims to present the recent progress on the research of black TiO2 nanomaterials, and how they can be used in a number of clean energy applications. The text covers a number of research topics, including the synthesis of black TiO2 nanomaterials (nanoparticles, nanowires and nanotubes) and their properties, the effect of point defects and ordered/disordered morphology, the applications in charge storage and photoelectrochemical water splitting, use in lithium ion batteries and in microwave absorption. Also included is a theoretical analysis of this research, thereby providing a comprehensive review of the subject for students, researchers and practitioners in catalytic science, materials science, nanotechnology, green technology, and chemistry.
Book Synopsis Nonstoichiometric Oxides by : O.T. Soerensen
Download or read book Nonstoichiometric Oxides written by O.T. Soerensen and published by Elsevier. This book was released on 2012-12-02 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonstoichiometric Oxides discusses the thermodynamic and structural studies of nonstoichiometric oxides. This eight-chapter text also covers the defect-defect interactions in these compounds. The introductory chapters describe the thermodynamic properties of nonstoichiometric oxides in terms of defect complexes using the classical thermodynamic principles and from a statistical thermodynamics point of view. These chapters also include statistical thermodynamic models that indicate the ordered nonstoichiometric phase range in these oxides. The subsequent chapters examine the transport properties, such as diffusion and electrical conductivity. Diffusion theories and experimental diffusion coefficients for several systems, as well as the electrical properties of the highly defective ionic and mixed oxide conductor, are specifically tackled in these chapters. The concluding chapters present the pertinent results obtained in nonstoichiometric oxide structural studies using high-resolution electron microscopy and X-ray and neutron diffraction. Inorganic chemists and inorganic chemistry teachers and students will greatly appreciate this book.
