Synthesis and Characterization of Aluminum-polyaniline Thin Films and Membranes

Abstract

Polyaniline (PAni) films of different intrinsic oxidation states, including emeraldine salt, emeraldine base and leucoemeraldine base, were synthesized. Free-standing membranes and thin film bilayers of aluminum-polyaniline were fabricated by magnetron sputter deposition of aluminum onto polyaniline films. Aluminum-polyaniline samples were analyzed by transmission electron microscopy (TEM) to investigate the microstructures of specimens, including cross-sectional TEM micrographs of the metal-polyaniline interfacial structure not previously reported in the literature. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were employed to study the chemical bonding and interaction between deposited aluminum and polyaniline at the interface. Results indicated that the intrinsic oxidation state of the polyaniline influenced the chemistry of the aluminum-polyaniline interface. Distinct interaction between aluminum and polyaniline in the emeraldine salt-form was observed. However, there was no evidence of direct interactions of the aluminum with emeraldine base and leucoemeraldine base polyaniline.

Department(s)

Materials Science and Engineering

Second Department

Chemistry

Sponsor(s)

United States. Defense Advanced Research Projects Agency

Keywords and Phrases

TEM; XPS; Aluminum-Polyaniline; Interface; Microstructure; Sputter Deposition

International Standard Serial Number (ISSN)

0142-2421

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2005 Wiley-Blackwell, All rights reserved.

Publication Date

01 Oct 2005

Link to Full Text

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