Conductive Langmuir-Blodgett films of transition metals with sulfur containing ligands

Abstract

Conductive Langmuir-Blodgett (LB) films of dialkyldimethylammonium-metal(dmit) 2 complexes are described. The precursor 1:1 complexes of Ni and Au were transferred onto substrates using icosanoic acid as a matrix. The conductive LB films were obtained by the bromine oxidation. The bulk conductivities in the lateral direction were 10 −3 to 10 −1 S/cm, depending on the length of alkyl chain. The conductivity of the Ni complex LB film was found to be Arrhenius-type with an activation energy of 0.065 eV, whose origin is not clear at present. The spectral changes during the oxidation of the LB films of Ni complex indicated that the species similar to those obtained from the bromine oxidation of (Bu 4N) [Ni(dmit) 2] were predominant in the oxidized LB film.