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ELECTRICAL AND ELECTROCHEMICAL PROPERTIES OF MOLECULAR AND CONDUCTING POLYMER COATED NANOSCALE FIELD EFFECT TRANSISTORS
by
James Vinh Ly
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
(MATERIALS SCIENCE)
May 2007
Copyright 2007 James Vinh Ly
Object Description
| Title | Electrical and electrochemical properties of molecular and conducting polymer coated nanoscale field effect transistors |
| Author | Ly, James Vinh |
| Author email | jamesly@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Materials Science |
| School | Viterbi School of Engineering |
| Date defended/completed | 2006-12-15 |
| Date submitted | 2007 |
| Restricted until | Unrestricted |
| Date published | 2007-04-16 |
| Advisor (committee chair) | Thompson, Mark E. |
| Advisor (committee member) |
Requicha, Ari Mansfeld, Florian |
| Abstract | The fields of carbon nanotube and indium oxide nanowires are joined together with molecular and polymeric functionalization in this dissertation. The combination of two disparate materials into a distinct heterostructure brings about materials properties uniquely different from their constituents. Chapter 1 lays the groundwork for these materials and our motivation to explore their combinatorial properties.; Chapter 2 explores molecular based information storage based on an architecture consisting of a porphyrin self assembled monolayer onto indium tin oxide field effect transistors. These studies are fundamentally based on the inherent, reversible redox active nature of porphyrins to serve as distinct memory states. Synthesis from the ground up of the porphyrin and metalloporphyrin species through to the design and testing of the memory device is presented.; Chapter 3 presents a test model to accurately predict the thickness of various doped electropolymerized polypyrrole films. These results provide an invaluable template in the effort to synthesize either carbon nanotube or indium tin oxide nanowires coated with a nanoscale polypyrrole sheath as performed in the following chapters.; Having established a reliable template for polypyrrole film growth, chapter 4 incorporates these conditions in the formation of polypyrrole coated carbon nanotube heterostructures to investigate the inherent quality that this electroactive polymer possesses to reversibly undergo electrochemical induced volume changes at the smallest scales known thus far.; In addition to the uncanny ability to reversibly alter its physical dimensions, the formation of polypyrrole coated carbon nanotube and polypyrrole coated indium oxide nanowires presents an immensely intriguing view into the electrical properties that result from the combination of two inherently conducting materials into a single distinct heterostructure as explored in chapter 5. Alteration to the polypyrrole layer by various means present attractive routes for electrical properties modification of the overall nanostructure. |
| Keyword | conducting polymers; polypyrrole; carbon nanotubes; heterostructures; molecular based memory; porphyrins; indium oxide nanowires; electrochemical polymerization |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m403 |
| Rights | Ly, James Vinh |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Ly-20070416 |
| Archival file | uscthesesreloadpub_Volume14/etd-Ly-20070416.pdf |
Description
| Title | Page 1 |
| Full text | ELECTRICAL AND ELECTROCHEMICAL PROPERTIES OF MOLECULAR AND CONDUCTING POLYMER COATED NANOSCALE FIELD EFFECT TRANSISTORS by James Vinh Ly A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree (MATERIALS SCIENCE) May 2007 Copyright 2007 James Vinh Ly |
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