Speaker
Description
In the present study, thin films of polyaniline conductive polymer have been deposited on glass substrate by AC Plasma Polymerization. Doped and undoped films were synthesized at the AC discharge voltage between 450 - 500 V, operating pressure of 0.13 and 0.14 Torr and the reaction time were set at 5, 10, 15, 20 and 30 minutes. For doped films, iodine powder was put inside the deposition reactor during the plasma polymerization process. The weight of the iodine used was varied as 0, 0.0087, 0.075 and 0.1726 grams in different in-situ doping deposition. Field Emission Scanning Electron Microscopy (FE-SEM) revealed dense, uniform films with the range of thickness between 41.3 – 570 nanometers. Attenuated total reflection Fourier transform infrared spectroscopic (ATR-FTIR) analysis showed the absorbance characteristics of polyaniline ring at 1300, 1450 and 1630 cm$^-1$. Energy Dispersive X-ray Spectrometer (EDS) also showed iodine profile in accordance with the initiative amount of iodine used. The electrical conductivities of the obtained films have been measured to be between 7.86 $\times$ 10$^-6$ – 5.38 $\times$ 10$-5$ S/cm. The conductivities of the in-situ iodine doped polyaniline films were found to be one to two order of magnitude higher than those of the undoped films.
