Abstract
A procedure for preparing transparent silica gels and xerogels has been developed and samples of these materials have been fabricated to investigate the effect of microenvironment on spectral and sensor properties of the Nile Red dye. Spectral properties of the dye in modified and unmodified gels and xerogels have been investigated using fluorescence spectroscopy. It has been found that these xerogels are permeable to volatile organic substances, and their potential use as fluorescent sensor material has been demonstrated.
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