Structural and Morphological Differences of Thin Films Obtained by Plasma Polymerization of Pyrrole (Ppy) and Thiophene (Pth)

摘要

In this work, thin films (thickness～0.5 μm) were obtained by plasma polymerization of pyrrole (Ppy) and thiophene (Pth) at 25-30 W and 0.1-0.2 mbar of pressure. Further doping with iodine was carried out to some of the Ppy and Pth films (Ppy/I_2, Pth/I_2) in order to enhance their electrical conductivity properties. Structural and morphological characterization of both Ppy and Pth as well as of Ppy/I_2 and Pth/I_2 was performed using Infrared Spectroscopy (IR), X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM). In the light of the information given by IR, XPS and AFM techniques, exhaustive and accurate description of both undoped and I_2/doped Ppy and Pth films obtained by Plasma Polymerization is attained.