Diffusion And Defects In Tio2

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Diffusion And Defects In Tio2

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Author :
language : en
Publisher:
Release Date : 2013

Diffusion And Defects In Tio2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

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.

Diffusion And Defects In Tio2

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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2013-08-30

Diffusion And Defects In Tio2 written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08-30 with Technology & Engineering categories.

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.

Solid State Chemistry And Photocatalysis Of Titanium Dioxide

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Author : Maria K. Nowotny
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2010-06-07

Solid State Chemistry And Photocatalysis Of Titanium Dioxide written by Maria K. Nowotny and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-06-07 with Technology & Engineering categories.

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.

New Mechanisms For Defect Engineering In Titanium Dioxide

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Author : Alice G. Hollister
language : en
Publisher:
Release Date : 2010

New Mechanisms For Defect Engineering In Titanium Dioxide written by Alice G. Hollister and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

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.

Defects And Diffusion Ceramics Abstracts

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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2006-03-15

Defects And Diffusion Ceramics Abstracts written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-03-15 with Technology & Engineering categories.

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).

Surface Reactions On Stoichiometric And Defective Titanium Dioxide

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Author : Enrique Farfan-Arribas
language : en
Publisher:
Release Date : 2004

Surface Reactions On Stoichiometric And Defective Titanium Dioxide written by Enrique Farfan-Arribas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Black Tio2 Nanomaterials For Energy Applications

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Author : Xiaobo Chen
language : en
Publisher: World Scientific
Release Date : 2016-12-08

Black Tio2 Nanomaterials For Energy Applications written by Xiaobo Chen and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-08 with Science categories.

'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.

Concentration Dependent Diffusion Of H In Tio2 Analysis Of Electronic Effects In Ionic Diffusion

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Author : O. W. Johnson
language : en
Publisher:
Release Date : 1974

Concentration Dependent Diffusion Of H In Tio2 Analysis Of Electronic Effects In Ionic Diffusion written by O. W. Johnson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.

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).

Defects And Diffusion In Ceramics Xiii

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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2012-09-19

Defects And Diffusion In Ceramics Xiii written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-19 with Technology & Engineering categories.

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.

Defects At Oxide Surfaces

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Author : Jacques Jupille
language : en
Publisher: Springer
Release Date : 2015-02-09

Defects At Oxide Surfaces written by Jacques Jupille and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-09 with Science categories.

This book presents the basics and characterization of defects at oxide surfaces. It provides a state-of-the-art review of the field, containing information to the various types of surface defects, describes analytical methods to study defects, their chemical activity and the catalytic reactivity of oxides. Numerical simulations of defective structures complete the picture developed. Defects on planar surfaces form the focus of much of the book, although the investigation of powder samples also form an important part. The experimental study of planar surfaces opens the possibility of applying the large armoury of techniques that have been developed over the last half-century to study surfaces in ultra-high vacuum. This enables the acquisition of atomic level data under well-controlled conditions, providing a stringent test of theoretical methods. The latter can then be more reliably applied to systems such as nanoparticles for which accurate methods of characterization of structure and electronic properties have yet to be developed. The book gives guidance to tailor oxide surfaces by controlling the nature and concentration of defects. The importance of defects in the physics and chemistry of metal oxide surfaces is presented in this book together with the prominent role of oxides in common life. The book contains contributions from leaders in the field. It serves as a reference for experts and beginners in the field.