Title:
Polyaniline Gold Nanocomposites
Polyaniline Gold Nanocomposites
Author(s)
Smith, Jon Anthony
Advisor(s)
Janata, Jiří
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Abstract
Polyaniline/Gold Nanocomposites
J. Anthony Smith
141 Pages
Directed by Dr. Ji and #345;?anata
The expectation that it is possible to create a range of new materials from two basic components, polyaniline fibers and gold particles is explored. Three synthetic methods were employed each of which created different materials and required different investigation techniques. The methods are: chemical, one step aniline oxidation / AuCl4- reduction; electrochemical/chemical, a two-step composite growth achieved by electrochemical polyaniline thin film growth followed by film immersion in AuCl4- solution and spontaneous reduction to gold particles; electrochemical, resulting in freestanding polyaniline thin film/Au nanoparticles carried out by electrochemical stripping of a polyaniline thin film grown over a sacrificial gold layer in the presence halide solutions. The incorporation of particles was shown to affect film morphology and electrical properties in all synthetic methods. The changes are in large part attributed to the development of a contact potential between the polyaniline and the gold particles. Applications for the composites include use as chemically sensitive layers, corrosion inhibition materials, and use as probes to evaluate nanoparticle substrate interactions.
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Date Issued
2004-11-22
Extent
7510374 bytes
Resource Type
Text
Resource Subtype
Dissertation