Abstract/Details

Controlled growth and characterization of one-dimensional nano-structured materials


2008 2008

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Abstract (summary)

As the research in nanomaterials is progressing at a rapid pace, it has become increasingly clear that the functionalization of the nanomaterials largely depends on the level of control in the fabrication of the nanomaterials. The main theme of this thesis is to develop a number of new techniques to fabricate one-dimensional nanostructured materials, study the growth processes and understand the growth mechanisms of the nanomaterials. The control over the nanomaterials growth was imparted by judiciously designing the synthesis experiments. Firstly, the ultra-thin β–Bi2O3 nanowires with a diameter down to 7 nm and a length of several μm have been successfully prepared for the first time using an oxidative metal vapor transport deposition technique. We also extended this technique for the controlled growth of thin ZnO nano-tetrapods. Secondly, the Kirkendall approach was first used to prepare ultra-thin, single crystalline ZnO nanotubes with inner and outer diameters of about 3 and 13 nm respectively. Thirdly, gold hollow tetrapods were prepared using ZnO tetrapods as the template, HAuCl4 as the gold source and ascorbic acid as the reducing reagent. Fourthly, we have successfully synthesized aligned ZnO nanowires and Cu(OH)2 nanoribbons on the corresponding Zn and Cu substrates through the gas-solution-solid method. Finally, the application of ZnO tetrapods and ultra-thin tube as humidity sensor was explored.

Indexing (details)


Subject
Materials science
Classification
0794: Materials science
Identifier / keyword
Applied sciences; Nanotubes; Zinc oxide
Title
Controlled growth and characterization of one-dimensional nano-structured materials
Author
Qiu, Yongfu
Number of pages
207
Publication year
2008
Degree date
2008
School code
1223
Source
DAI-B 70/02, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9781109014266
Advisor
Yang, Shihe
University/institution
Hong Kong University of Science and Technology (Hong Kong)
Department
HKUST
University location
Hong Kong
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3344438
ProQuest document ID
250862561
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/250862561
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