MULTICOMPONENT LB FILMS CONTAINING PREFORMED POLY(3-N-ALKYLTHIOPHENES)

The paper reports on the deposition of two-component Langmuir-Blodgett films containing poly(3-n-alkylthiophenes) with ''film-builders'' -lo w-molecular-weight amphiphilic molecules facilitating film formation. Fatty acids and 3-n-octadecylpyrrole were used as builders. The thickn esses and electric permittivities of the films were determined by meas urements of the surface plasmon resonance; it was found that the forme r parameter is controlled by the length of the builder molecules. The electrical conductivities of the deposited films were of the order of 1 mu S/m. The contact with oxides gives rise to an abrupt increase of conductivity by several orders of magnitude, followed by a decrease du e to an irreversible destruction of the pi-electron system of the poly mer.