Surface plasmon resonance as a probe of the complexing process of valinomycin Langmuir-Blodgett films by potassium ions

X. L. Yang*, P. Dutta, G. K. Wong, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We have demonstrated that the surface plasmon resonance (SPR) method is sensitive to the complexing process of potassium ions with valinomycin Langmuir-Blodgett (LB) films. Our SPR results allow us to conclude that the valinomycin molecule is nearly parallel to the substrate surface for both pure valinomycin LB films and films formed from a mixture of valinomycin and stearic acid. It is also shown that, in the presence of stearic acid, valinomycin LB films can reversibly complex with potassium ions: a complexed film exposed to pure water will release K+ ions, suggesting the possible use of this system as a reversible sensor.

Original languageEnglish (US)
Pages (from-to)210-214
Number of pages5
JournalThin Solid Films
Volume219
Issue number1-2
DOIs
StatePublished - Oct 30 1992

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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