Abstract
We have studied the luminescence and spectroscopic properties of erythrosin B-doped sol-gel silica in aqueous solutions. Stern-Volmer plot was obtained for the phosphorescence intensity as a function of the dissolved oxygen content. Leaching of the dye molecules from the sol-gel matrix was examined by absorption spectroscopy. That acid-catalysed sol-gel materials leach slowly and based-catalysed sol-gel materials leach rapidly was revealed. Absorption data of the sol-gel materials indicated the existence of two leaching rate constants. Finally we demonstrated that the sol-gel oxygen sensor had a response time faster than 30 ms.
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Chan, M.A., Lam, S.K. & Lo, D. Characterization of Erythrosin B-Doped Sol-Gel Materials for Oxygen Sensing in Aqueous Solutions. Journal of Fluorescence 12, 327–332 (2002). https://doi.org/10.1023/A:1021349507047
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DOI: https://doi.org/10.1023/A:1021349507047