ERA

Download the full-sized PDF of TiO2 Nanotube Arrays with Engineered Geometries: Growth, Characterization and Study of Selected InterfacesDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3XS5JT5V

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

TiO2 Nanotube Arrays with Engineered Geometries: Growth, Characterization and Study of Selected Interfaces Open Access

Descriptions

Other title
Subject/Keyword
TiO2 Nanotube
Characterization
Amphiphobic
perfluorinated surface
Interfacial band alignment
Thin Film
periodically modulated titanium dioxide nanotube arrays
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Farsinezhad, Samira
Supervisor and department
Dr. K. Shankar
Examining committee member and department
José E. Herrera (Civil and Environmental Engineering- Western University)
Xihua Wang (Electrical and Computer Engineering)
Natalia Semagina (Chemical and Material Engineersing)
Mojgan Daneshmand (Electrical and Computer Engineering)
Sandipan Pramanik (Electrical and Computer Engineering)
Karthik Shankar (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Microsystems and Nanodevices
Date accepted
2016-01-11T14:19:32Z
Graduation date
2016-06
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
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.
Language
English
DOI
doi:10.7939/R3XS5JT5V
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2016-01-11T21:19:54.178+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (PDF/A)
Mime type: application/pdf
File size: 10462861
Last modified: 2016:06:16 17:13:52-06:00
Filename: Farsinezhad_Samira_201601-PhD.pdf
Original checksum: 8a948b1eeb2ee7ea2659012695966f66
Activity of users you follow
User Activity Date