Original scientific paper
Optical properties of polyaniline salt and polyaniline base with KBr, Co(CH3COO)2 and picric acid composites
W. M. Sayed
; Petroleum Research Institute, Nasr City, Cairo, Egypt
L. I. Soliman
; National Research Centre, Solid State Phys. Dept., Dokki, Cairo, Egypt
Abstract
Polyaniline was prepared by chemical methods. The composites were prepared by the hot pressing of polyaniline base with different percentages of KBr, Co(CH3COO)2 and picric acid. The diffused reflectance of polyaniline doped with 10, 15, 25 and 50 wt% of KBr, picric acid and cobalt acetate, was measured at room temperature in the wavelength range from 500 to 1800 nm. The energy gaps of the samples were then deduced as well as the position and number of the indirect transitions which were found to be dependent on the concentration percentage of the doping materials. The energy gaps of all samples decrease by increasing the concentration percentage of the doping materials.
Keywords
polyaniline composites; doping with KBr; picric acid and cobalt acetate; energy gaps; indirect transitions
Hrčak ID:
301089
URI
Publication date:
1.9.2000.
Visits: 216 *