Studies on a conducting Langmuir-Blodgett film based on a non-amphiphilic tetrathiafulvalene

A novel mixed Langmuir-Blodgett(LB) film based on a 1:1 (molar ratio) mixture of a new non-amphiphilic tetrathiafulvalene (TTF) derivative dibenzylthio-dimethylthio-tetrathiafulvalene, and arachidic acid(AA) was constructed and characterized by FTIR, UV spectra and X-ray diffraction. Measurement of conductivities of the LB films relating to the number of layers at room temperature showed that the conductivity of the films decreased with the increasing of layer number, After iodine doping the conductivities of the LB films increased by 10(2) similar to 10(3) magnitude compared with those before iodine doping and reached the maximum 2.5x10(-3) S/cm due to the formation of a new conducting phase, which was demonstrated by FTIR and UV spectral analyses, The result from X-ray diffraction indicates that the LB film has an ordered lamellar structure with a thickness per layer of 2.32 nm.