Pure and iodine-doped polyaniline thin films are prepared by ac plasma
polymerization technique. Doping of iodine is carried out in situ as well
as by employing iodine chamber methods. The structural analyses of pure and
iodine-doped polyaniline thin films are carried out by FTIR spectroscopic
studies. Optical bandgaps of these films are evaluated from UV-VIS
absorption studies. Direct and indirect transition energy gaps are
determined from Tauc plots. The structural changes of polyaniline upon
doping and the reduction of optical bandgap are explained on the basis of
the results obtained from FTIR spectroscopic and UV-VIS absorption studies.
Polyaniline thin films were prepared by ac plasma polymerization technique. Capacitance, dielectric loss, dielectric constant and ac conductivity of these films were investigated in the frequency range from 100 Hz to 1 MHz and in the temperature range from 300 to 373 K. Capacitance and dielectric loss decreased with frequency and increased with temperature. This type of behaviour was found to be in good agreement with an existing model. The ac conductivity σ (ω) was found to vary as ω s with the index s 1. Annealing of polyaniline thin films in high vacuum at 373 K for 1 h was found to reduce the dielectric loss. FTIR studies reveal that the aromatic ring is retained in the polyaniline thin films, which enhances the thermal stability of the polymer films.
Transparent, flexible, lithium ion conducting, freestanding, solid polymer electrolyte for solid state devices is developed based on polydimethylsiloxane, poly(ethylene oxide) and LiClO4, and the salting in phenomenon resulting in the amorphisation of the polymer matrix is established.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.