METALLIC TRANSPORT-PROPERTIES OF CONDUCTING LANGMUIR-BLODGETT-FILMS

The conductivity of the Langmuir-Blodgett (LB) films was examined in t erms of a granular structure. The conductivity of bis(ethylenedioxy)te trathiafulvalene-dec (BO-C(10)TCNQ) LB film was well fitted by the for mula, sigma = AT(alpha)p(-E(a)/kT), where the behavior is determined b y the semiconducting domain boundaries in the granular-structured film . The metallic nature of the domains was revealed by thermoelectric po wer measurements: the temperature dependence of the thermoelectric pow er was almost linear with T. The temperature dependence of the conduct ivity in tridecylmethylammonium-Au(dmit)(2)(3C10-Au) LB film is well e xplained by a linear combination of Sheng's model and common metal, R = C(1)exp[T-1/(T+T-0)] + C2T. The conduction was governed by the fluct uation-induced tunneling between metallic domains.