STUDY OF STRUCTURAL AND TRANSPORT PROPERTIES OF IODINATED AMORPHOUS CONDUCTING CARBON FILMS

Abstract

Iodine intercalated amorphous conducting carbon (a-C:I) films are prepared by vapor phase pyrolysis of maleic anhydride and iodine. Transmission electron microscopy (TEM), Selected area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS) studies reveal the structural changes in the iodinated amorphous conducting carbon (a-C) films. TEM micrographs accounts for a average cluster size of the order of ~900 nm in a-C:I film. SAED study depicts a polycrystalline phase of the intercalated sample. Electrical resistivity of a-C:I samples are found to decrease with the iodine incorporation. Metal–insulator transition is observed as a function of magnetic field.