A novel sol gel processed silica: poly(2-bromo-5-methoxy-p-phenylene vinylene)/silica composite was prepared using a soluble precursor. The optical properties of this material have been investigated using u.v.-visible and FTi.r. spectroscopy. The densification process was monitored by d.s.c, and t.g.a. The third-order non-linear susceptibility Z 13) has been investigated for both the pure polymer and its sol,el composite at 602 nm using femtosecond degenerate four-wave mixing. A relatively large ~(3) value with a subpicosecond response is observed. The electrical conductivities of AsF 5 doped polymer and composite films were studied using four-probe measurement
Посилання на статтю:
Study of third-order optical non-linearity and electrical conductivity of sol-gel processed silica: poly(2-bromo-5-methoxy-p-phenylene vinylene) composite / Chichang J. Wung, Kwang-Sup Lee and Paras N. Prasad // Polymer. – 1992. – Vol 33. – P. 4145-4151.