Nucleation and growth mechanism of electropolymerization of polypyrrole ongold/highly oriented pyrolytic graphite electrode

Authors
Hwang, BJ Santhanam, R Lin, YL
Citation
Bj. Hwang et al., Nucleation and growth mechanism of electropolymerization of polypyrrole ongold/highly oriented pyrolytic graphite electrode, J ELCHEM SO, 147(6), 2000, pp. 2252-2257
Citations number
38
Categorie Soggetti
Physical Chemistry/Chemical Physics","Material Science & Engineering
Journal title
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN journal
00134651 → ACNP
Volume
147
Issue
6
Year of publication
2000
Pages
2252 - 2257
Database
ISI
SICI code
0013-4651(200006)147:6<2252:NAGMOE>2.0.ZU;2-L
Abstract
Nucleation and growth mechanism of polypyrrole films was investigated on va por deposited gold/highly oriented pyrolytic graphite by current-time trans ient (i-t) measurements and atomic force microscopy. It was found that the nucleation and growth was an instantaneous two-dimensional process before n uclei overlapping and progressive three-dimensional after nuclei overlappin g. The polypyrrole structure was observed to be zigzag or screw-type and pa rticle-like for thin and thick films, respectively. (C) 2000 The Electroche mical Society. S0013-4651(99)06-153-4. All rights reserved.