Thin Films Sensitive to pH Changes Prepared by Sol-Gel Method

被引：6

作者：

Kubeckova, M. ^{[1
]}

Pospisilova, M. ^{[2
]}

Matejec, V. ^{[2
]}

机构：

[1] Eastman Chem Corp, Prague 1, Czech Republic

[2] CAS, Inst Radioengn & Elect, Prague 18251 8, Czech Republic

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1994年 / 2卷 / 1-3期

关键词：

thin film; optical fibre; pH monitoring; optical absorption;

D O I：

10.1007/BF00486315

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The light absorption change of phenolphthalein entrapped in a silica or titania matrix coated as a thin film onto a quartz optical fibre or on planar substrate by the sol-gel technique has been studied. The possibility to use this effect together with evanescent wave principle for the monitoring of pH changes has been tested. The film drying conditions necessary for the film to be sensitive to pH changes were determined experimentally. The stability and reversibility of the colour change was found to be better in the case of titanium matrix.

引用

页码：591 / 593

页数：3