Temperature Dependence of Phosphor Contained Silica Gel Sensor

Variations in the photoluminescence (PL) spectra from porous silica gel containing the luminous organic pigments, which is sensitive to organic vapors, were evaluated at various temperatures. PL intensity from rhodamine and fluorescein contained silica gel decreases with temperature. Temperature coefficient of peak intensity from rhodamine and fluorescein contained silica gel is found to be different. In order to evaluate using rhodamine and/or fluorescein contained silica gel sensors, temperature must be controlled during measurement. Fluorescence thermometer is also suggested to be developed based on temperature dependence of photoluminescence from rhodamine and fluorescein contained silica gel sensors.