Growth and characterization of polyaniline 7,7,8,8-tetracyanoquino-dimethane (TCNQ) complex films grown by vacuum evaporation

High quality polycrystalline polyaniline/7,7,8,8-tetracyanoquino-dimethane (PANI-TCNQ) complex thin films have been grown by vacuum evaporation. A sca nning tunneling microscope, transmission electron microscopy and high resol ution scanning electron microscopy characterized the films. The films showe d totally different optical and electrical properties from both of PANI and TCNQ films. Unusual two-dimensional aggregates were observed in the films. A charge transfer phenomenon, from the PANI chains to the TCNQ molecules, was observed from the Fourier transfer infrared spectrum. Compared with tha t of PANI and TCNQ thin films, the structural and electrical properties of the PANI-TCNQ thin films are discussed. (C) 2000 Elsevier Science S.A. All rights reserved.