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Titanium dioxide nanoparticle arrays...

Bullen, Heather Anne.

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Titanium dioxide nanoparticle arrays for photocatalysis.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Titanium dioxide nanoparticle arrays for photocatalysis./
作者:	Bullen, Heather Anne.
面頁冊數:	170 p.
附註:	Adviser: Simon J. Garrett.
Contained By:	Dissertation Abstracts International63-12B.
標題:	Chemistry, Analytical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3074979
ISBN:	0493951377

Titanium dioxide nanoparticle arrays for photocatalysis.
Bullen, Heather Anne.

Titanium dioxide nanoparticle arrays for photocatalysis. - 170 p.

Adviser: Simon J. Garrett.

Thesis (Ph.D.)--Michigan State University, 2002.

Recent scientific interest in TiO2 photocatalysis has been motivated by observations of size-dependent properties in TiO2 nanoparticles. As such, correlating the surface morphology with particle size-dependent photoreactivity is important to understanding the photocatalyic behavior of TiO2 nanomaterials. Currently, particles produced by solution phase methodologies are not amenable to surface characterization. A novel nanosphere lithography (NSL) approach to create supported TiO2 nanoparticles of varied size and shape is presented in this dissertation. These TiO 2 nanoparticles were systematically characterized as a function of size (386-36 nm) using both microscopic and spectroscopic analytical techniques.

ISBN: 0493951377Subjects--Topical Terms:

586156
Chemistry, Analytical.

Titanium dioxide nanoparticle arrays for photocatalysis.
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502 $a Thesis (Ph.D.)--Michigan State University, 2002.
520 $a Recent scientific interest in TiO2 photocatalysis has been motivated by observations of size-dependent properties in TiO2 nanoparticles. As such, correlating the surface morphology with particle size-dependent photoreactivity is important to understanding the photocatalyic behavior of TiO2 nanomaterials. Currently, particles produced by solution phase methodologies are not amenable to surface characterization. A novel nanosphere lithography (NSL) approach to create supported TiO2 nanoparticles of varied size and shape is presented in this dissertation. These TiO 2 nanoparticles were systematically characterized as a function of size (386-36 nm) using both microscopic and spectroscopic analytical techniques.
520 $a Two distinct TiO2 nanoparticle arrays were produced by NSL from monolayer and bilayer masks of hexagonally close-packed polystyrene spheres. In addition, a third particle array, derived from cubic close-packed spheres, was observed. The TiO2 nanoparticle diameter and height were varied independently by simply changing the mask sphere size or deposition time, respectively. Atomic force microscopy (AFM) analysis showed that the morphology of the nanoparticles changed as function of particle diameter, converting from a triangular (386 nm) to a circular profile (36 nm). X-ray photoelectron analysis indicated that the surface composition of Ti<super>3+</super> states increased with particle size. It was speculated that the morphological changes observed for the smaller nanoparticles were correlated with an increase in Ti-O surface coordination.
520 $a Synthesis of suitable conductive substrates other than glass (ones that could epitaxially stabilize a desired crystallinity of TiO2 nanoparticles) was also investigated. RuO2 single crystals with 2 mm dimensions were produced using a chemical vapor transport technique. CrO2 thin films on TiO2(110) rutile single crystals were grown using a CVD technique. These films were highly (110) textured, continuous, and exhibited similar ferromagnetic and metallic behavior to bulk CrO2 powder.
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