Effects produced by sodium dodecyl sulfate (SDS) surfactant on polypyrrole film electrochemically synthesized and doped with glow discharge plasma

This work presents a study of the chemical structure, morphology, electromagnetic absorption and electric conductivity of thin films. The electrochemical synthesis of polypyrrole/surfactant (PPy/SDS) films doped with iodine is carried out by glow discharge plasma in aqueous solution, at different reaction times. The morphology shows agglomerations of particles dispersed in the surface. Infrared spectroscopic analysis shows absorption on the wavenumbers 2915,2362 and 2082 cm -1 corresponding to chemical groups C-H, C=O and R/N=C=S, respectively. The electromagnetic absorption had higher response sensitivity between 340 to 800 nm in the visible region, and the electric conductivity of samples oscillated between 5.0x10 -6 and 2.0x10 -5 S/cm. The thickness films significantly increased when doping with iodine, reaching values up to 50 μm.