Dissertation/Thesis Abstract

Semiconductor and metal oxide nanoparticles: Synthesis, physical properties and industrial application
by Li, Shu, Ph.D., Columbia University, 2009, 116; 3388471
Abstract (Summary)

This thesis addresses various aspects of nanoparticles which attract considerable scientific interest.

In chapter 2 and 3, photoionization of individual nanocrystals (CdSe/CdS and CdSe/CdS/ZnS) has been studied by Electric Force Microscopy (EFM). A different response have been observed for two types of high-quality NCs. The magnitude of the charge due to photoionization was found to be wavelength dependent which implies a "hot-electron" process.

A new metastable phase of vanadium dioxide hydrate with one-dimensional nanostructure has been synthesized through hydrothermal recrystallization which is described in chapter 4. We propose a hydrating-exfoliating-splitting mechanism to elucidate the formation of nanowires and nanoribbons.

Finally, we have conducted synthesis of HfO2 nanoparticles with different crystallinity and morphology. Among them, the amorphous form of HfO2 nanoparticles shows a high solubility in organic solvent which makes it a possible material for high refractive index fluid used in photolithography industry. There is a restriction due to the absorption at the UV region of spectrum. All the details are talked about in chapter 5 and chapter 6.

Indexing (document details)
Advisor: Brus, Louis
School: Columbia University
School Location: United States -- New York
Source: DAI-B 70/12, Dissertation Abstracts International
Subjects: Physical chemistry
Keywords: Hafnium oxide, Metal oxide nanoparticles, Nanocrystals, Photoionization, Vanadium dioxide
Publication Number: 3388471
ISBN: 978-1-109-54821-1
Copyright © 2020 ProQuest LLC. All rights reserved. Terms and Conditions Privacy Policy Cookie Policy