Simultaneous observation of the electropolymerisation process of conducting polymers by surface plasmon resonance spectroscopy, surface plasmon enhanced light scattering and cyclic voltammetry

Akira Baba, Rigoberto C. Advincula, Wolfgang Knoll

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this study, we report the combined use of surface plasmon resonance spectroscopy (SPR) and cyclic voltammetry to investigate the electropolymerization process of aniline onto a gold electrode in situ. Electropolymerization of aniline was achieved by applying a cycling potential known from cyclic voltammetry monitored by SPR simultaneously. The potential cycling resulted in an oscillation of the SPR kinetic reflectivity curve. The time differential SPR kinetic reflectivity curve was correlated with the cyclic voltammogram at higher potential. At lower potential, a large difference between the SPR kinetic reflectivity curve and the cyclic voltammogram was observed. It is shown that this difference is caused by scattered light enhanced by the SPR and is due to the change of the optical refractive index at the polyaniline/electrolyte interface. The technique promises to be an important tool in determining the mechanism for the electropolymerization processes of conducting polymers.

Original languageEnglish
Pages (from-to)55-70
Number of pages16
JournalStudies in Interface Science
Volume11
Issue numberC
DOIs
Publication statusPublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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