ORGANIC DYE DOPED SILICA GLASSES PRODUCED FROM SILICA NANO- PARTICLES BY USING HIGH PRESSURE AT ROOM TEMPERATURE

摘要

Polymerization of glass nano-particles under high pressure is of interest as a new process for producing bulk materials. We have successfully produced organic dye (Rhodamine 6G) doped silica glasses at room temperature by using high-pressure technique from the mixtures of dye molecules and nano-sized silica glass particles. The glasses were transparent and showed photoluminescence, while the peak position of photoluminescence band was different from that of the dye solution. The glasses exhibited photoluminescence even after annealing at 300 °C in air. Moreover, dye molecules hardly leaked out of the glasses in ethanol for several months. These results suggest that dye molecules were perfectly surrounded by silica matrix, and that the electronic state of dye molecule was affected by silica matrix.