Preferential orientation of short chain vapor deposited polyaniline thin films on gold

Authors

B. Xu, University of Nebraska-Lincoln
Jaewu Choi, University of Nebraska-LincolnFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

5-1-2002

Comments

Published in Journal of Vacuum Science and Technology A 20:3 (MAY/JUN 2002). http://www.avs.org/literature.jvst.a.aspx Copyright © 2002 AMERICAN VACUUM SOCIETY. Used by permission.

Abstract

Vapor deposited short chain polyaniline thin films were studied using angle-resolved photoemission spectroscopy. Films grown on two different substrates, oxidized Si surfaces and Au, show distinctly different properties. Some indication of preferential molecular orientation was observed for ultrathin films deposited on Au substrates, but not on the Si substrates with the native oxide surface. Clear indication of metallic character was observed for some of the polyaniline ultrathin films, consistent with recent theory suggesting that alignment of chains parallel with a metal substrate enhance metallicity.