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Preparation and properties of conducting arachidic acid/polypyrrole composite langmuir–blodgett films

✍ Scribed by Yun Heum Park; Seong Yoon Park; Sung Woo Nam; Chong Rae Park; Young Jun Kim

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
859 KB
Volume
60
Category
Article
ISSN
0021-8995

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✦ Synopsis

Electrically conducting arachidic acid/polypyrrole (PPy) composite films were prepared by exposing the arachidic acid LB films containing ferric chloride to pyrrole vapor. The optimum conditions to deposit matrix LB film were the subphase temperature of 23-25"C, pH of 6.0 and ferric chloride concentration of 5.0 X M . The formation of PPy in the arachidic acid matrix LB films was confirmed by UV-visible spectra, FTIR spectra, and scanning electron micrographs. The average thickness of the composite LB films prepared at 0°C was 1525 A. The composite films prepared a t lower temperatures have more uniform surface and exhibit higher electrical conductivity than the films prepared a t higher temperatures do. The in-plain conductivity and the transverse conductivity of the composite film were 10-3-10-2 S/cm and S/cm, respectively, and, thus, the conductivity anisotropy was about lo3.

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