Tio2 Nanotube Arrays With Engineered Geometries
Download Tio2 Nanotube Arrays With Engineered Geometries PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Tio2 Nanotube Arrays With Engineered Geometries book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages.
TiO2 Nanotube Arrays with Engineered Geometries
Titanium dioxide (TiO2) is a wide band gap, robust, n-type semiconductor whose transformation into vertically-oriented nanotube arrays makes them suitable electron percolation pathways for vectorial charge transfer togerther with high surface area. Growth of self-organized TiO2 nanotube arrays as a membrane or on non-native substrates is critical for exploiting the full potential of this nanostructure in a variety of applications. Although regular TNAs on native substrates constitute one of the most potent semiconductors for a variety of applications, to date, less research has been conducted on engineering the geometry of such structures for photon management. In this dissertation, a fundamental investigation into TNA-based photon management by periodically modulated titanium dioxide nanotube arrays (PMTiNTs) and double layer TNAs on native substrates was carried out. The present work shows that bilayer film stacks consisting of nanotubes with small (~60 nm) and large (~200 nm) diameters, respectively improve the optical absorption. In the second part of this thesis, wherein the geometry of these unique nanostructures is engineered, galvanostatic pulse- generated modulation was used. The highly ordered PMTiNTs have been reported, which constitute bottom-up fabricated one-dimensional photonic crystals. As a last phase of the synthesis process, highly sophisticated vacuum deposition based techniques were used to investigate the influence of a variety of deposition rates and pressures at room temperataure on anodic nanotube growth formation on non-native substrates. In the third phase of the work, X-ray and ultraviolet photoelectron spectroscopic studies were used to investigate the interfacial band alignment for photocatalytic charge separation in TiO2 nanotube arrays coated with CuPt nanoparticles. In the last phase, low energy surfaces repellent to a wide spectrum of liquids by functionalizing TiO2 nanotubes arrays using monolayers of two different fluorinated hydrocarbon molecules were studied.
TiO2 Nanotube Arrays
Author: Craig A. Grimes
language: en
Publisher: Springer Science & Business Media
Release Date: 2009-08-11
TiO2 Nanotube Arrays: Synthesis, Properties, and Applications is the first book to provide an overview of this rapidly growing field. Vertically oriented, highly ordered TiO2 nanotube arrays are unique and easily fabricated materials with an architecture that demonstrates remarkable charge transfer as well as photocatalytic properties. This volume includes an introduction to TiO2 nanotube arrays, as well as a description of the material properties and distillation of the current research. Applications considered include gas sensing, heterojunction solar cells, water photoelectrolysis, photocatalytic CO2 reduction, as well as several biomedical applications. Written by leading researchers in the field, TiO2 Nanotube Arrays: Synthesis, Properties, and Applications is a valuable reference for chemists, materials scientists and engineers involved with renewable energy sources, biomedical engineering, and catalysis, to cite but a few examples.
Electrochemically Engineered Nanoporous Materials
This book provides in-depth knowledge about the fabrications, structures, properties and applications of three outstanding electrochemically engineered nanoporous materials including porous silicon, nanoporous alumina and nanotubular titania. The book integrates three major themes describing these materials. The first theme is on porous silicon reviewing the methods for preparation by electrochemical etching, properties and methods for surface functionalization relevant for biosensing applications. Biomedical applications of porous silicon are major focus, described in several chapters reviewing recent developments on bioanalysis, emerging capture probes and drug delivery. The second theme on nanoporous alumina starts with describing the concept of self-organized electrochemical process used for synthesis nanopore and nanotube structures of valve metal oxides and reviewing recent development and progress on this field. The following chapters are focused mainly on optical properties and biosensing application of nanoporous alumina providing the reader with the depth of understanding of the structure controlled optical and photonic properties and design of optical biosensing devices using different detection principles such as photoluminescence, surface plasmon resonance, reflective spectrometry, wave guiding, Raman scattering etc. The third theme is focused on nanotubular titania reviewing three key applications including photocatalysis, solar cells and drug delivery. The book represents an important resource for academics, researchers, industry professionals, post-graduate and high-level undergraduate students providing them with both an overview of the current state-of-the-art on these materials and their future developments.