Characterization of erythrosin B-doped sol-gel materials for oxygen sensing in aqueous solutions

被引：9

作者：

Chan, MA ^{[1
]}

Lam, SK

Lo, D

机构：

[1] C & C Authenticat Lab Ltd, Hong Kong, Hong Kong, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

来源：

JOURNAL OF FLUORESCENCE | 2002年 / 12卷 / 3-4期

关键词：

erythrosin; sol-gel materials; aqueous solutions;

D O I：

10.1023/A:1021349507047

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We have studied the luminescence and spectroscopic properties of erythrosin B-doped sol-gel silica in aqueous solutions. Stem-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.

引用

页码：327 / 332

页数：6

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