|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.48 [2010] >
IJPAP Vol.48(07) [July 2010] >
| Title: | Effects of gamma ray and neutron radiation on polyanilne conducting polymer |
| Authors: | Sonkawade, R G
Kumar, Vijay
Annapoorni, S
Vaijapurkar, S G
Dhaliwal, A S |
| Keywords: | Polyaniline
Gamma rays
Neutron
UV-visible spectroscopy
XRD
Raman spectroscopy |
| Issue Date: | Jul-2010 |
| Publisher: | CSIR |
| Abstract: | Ionizing radiation
effects such as neutron and gamma on conducting polyanilne have been studied
for various doses varied from 6 to 504Gy and 15 to 41.9 kGy, respectively.
Spectroscopic methods such as UV-Vis spectroscopy, X-ray diffraction, Raman
spectroscopy and I-V measurements
have been used to characterize the pristine and irradiated polyanilne samples.
UV-visible spectroscopy shows a shift in the absorption edge towards visible
region after irradiation, which can be correlated to the transition involved in
these polymers and variation in the band gaps (Eg) using Tauc’s expression which indicate a
decrease in band gap. XRD spectra revealed that crystallinity and particle size
improve after irradiation, which could be attributed to cross-linking
mechanism. The current voltage (I-V)
characteristics have been carried out at room temperature using four probe set
up and it has been found that polyaniline films show ohmic behaviour before and
after irradiation. Moreover, conductivity improves after irradiation, which is
due to enhancement in carrier concentration. Conducting polymers as a radiation sensor for gamma and neutron as
well as for dosimetry aspects have been studied. |
| Page(s): | 453-456 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.48(07) [July 2010]
|
|
