Evolution of polypyrrole band structure: A scanning tunneling spectroscopy study

R. Yang, W. H. Smyrl, D. F. Evans, W. A. Hendrickson

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Scanning tunneling spectroscopy (STS) has been used to determine the band structure of polypyrrole. The polypyrrole films were electropolymerized onto a highly oriented pyrolytic graphite surface using a rotating disk electrode. Differential conductance spectra measurements allowed us to follow the evolution of the band gap as a function of doping level. Before and after the STS measurements, the film structure was imaged by scanning tunneling microscopy. The STS results agree with data obtained by inverse photoemission spectroscopy.

Original languageEnglish (US)
Pages (from-to)1428-1430
Number of pages3
JournalJournal of physical chemistry
Volume96
Issue number3
DOIs
StatePublished - 1992

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