Impedance spectroscopy of electrodes modified by Langmuir-Blodgett films
- Laboratoire de Photophysique-Photochimie Moleculaire (France)
- Ecole Nationale Superieure de Chimie et de Physique de Bordeaux, Universite de Bordeaux I, 33405 Talence Cedex (France)
The techniques of a.c. impedance spectroscopy and FTIR spectroscopy are used to investigate the properties of Langmuir-Blodgett (LB) films deposited respectively on ITO (Indium Tin Oxyde) coated glass electrode, and on Calcium Fluoride plates. 22-tricosenoic acid is transferred from a subphase containing an electrolyte and a redox system (Fe(CN){sup 3{minus}/4{minus}}). The IR spectra show selective insertion of the Fe(CN){sup 4{minus}} ion in the film. Measurements of the complex impedance of 22-tricosenoic acid are then presented and discussed as a function of the number of deposited layers. An equivalent electrical circuit is proposed which takes into account the defects of the film. {copyright} {ital 1996 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 288317
- Report Number(s):
- CONF-950119-; ISSN 0094-243X; TRN: 96:024037
- Journal Information:
- AIP Conference Proceedings, Vol. 354, Issue 1; Conference: 53. international meeting of physical chemistry: organic coatings, Paris (France), 2-6 Jan 1995; Other Information: PBD: Jan 1996
- Country of Publication:
- United States
- Language:
- English
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