Multicomponent lb films containing pre‐formed poly(3‐n‐Alkylthiophenes)

Abstract

The paper reports on the deposition of two‐component Langmuir‐Blodgett films containing poly(3‐n‐alkylthiophenes) with “film‐builders” —low‐molecular‐weight amphiphilic molecules facilitating film formation. Fatty acids and 3‐n‐octadecylpyrrole were used as builders. The thicknesses and electric permittivities of the films were determined by measurements of the surface plasmon resonance; it was found that the former parameter is controlled by the length of the builder molecules. The electrical conductivities of the deposited films were of the order of 1 μS/m. The contact with oxides gives rise to an abrupt increase of conductivity by several orders of magnitude, followed by a decrease due to an irreversible destruction of the π‐electron system of the polymer.