Simultaneous surface plasmon optical and electrochemical investigation of layer-by-layer self-assembled conducting ultrathin polymer films

Akira Baba, Mi Kyoung Park, Rigoberto C. Advincula, Wolfgang Knoll

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

In this study, we use a novel method for simultaneously measuring the optical and electrochemical properties of layer-by-layer self-assembled conducting ultrathin polymer films. We employed the recently developed combination of in situ surface plasmon resonance spectroscopy (SPS) and surface plasmon field-enhanced light scattering (SPFELS) with an electrochemical method (cyclic voltammetry). Polyaniline (PANI) and sulfonated polyaniline (SPANI) were used as the polycation and the polyanion for the conducting layer-by-layer film assemblies. The doping-dedoping process of the PANI/SPANI at different film thicknesses was investigated by electrochemical-SPS/SPFELS. The potential cycling resulted in characteristic oscillations that were sensitively monitored with this technique. We were able to obtain in situ information on dielectric constant changes of the PANI/SPANI layer-by-layer films with respect to film thickness and their corresponding morphology transitions during the electrochemical process. Thus, this experimental approach allows for the simultaneous elucidation of optical and electrochemical properties of conducting polymers in thin film formats.

Original languageEnglish
Pages (from-to)4648-4652
Number of pages5
JournalLangmuir
Volume18
Issue number12
DOIs
Publication statusPublished - 2002 Jun 11
Externally publishedYes

Fingerprint

Ultrathin films
conducting polymers
Polyaniline
Polymer films
Electrochemical properties
Light scattering
Film thickness
light scattering
film thickness
Optical properties
Spectroscopy
optical properties
Conducting polymers
Surface plasmon resonance
surface plasmon resonance
assemblies
spectroscopy
Cyclic voltammetry
format
polyaniline

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Simultaneous surface plasmon optical and electrochemical investigation of layer-by-layer self-assembled conducting ultrathin polymer films. / Baba, Akira; Park, Mi Kyoung; Advincula, Rigoberto C.; Knoll, Wolfgang.

In: Langmuir, Vol. 18, No. 12, 11.06.2002, p. 4648-4652.

Research output: Contribution to journalArticle

Baba, Akira ; Park, Mi Kyoung ; Advincula, Rigoberto C. ; Knoll, Wolfgang. / Simultaneous surface plasmon optical and electrochemical investigation of layer-by-layer self-assembled conducting ultrathin polymer films. In: Langmuir. 2002 ; Vol. 18, No. 12. pp. 4648-4652.
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