ENHANCED EVANESCENT WAVE SENSORS BASED ON SOL GEL-DERIVED POROUS-GLASS COATINGS

被引：82

作者：

MACCRAITH, BD

机构：

[1] School of Physical Sciences, Dublin City University, Glasnevin

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1993年 / 11卷 / 1-3期

关键词：

D O I：

10.1016/0925-4005(93)85235-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

optical chemical and biochemical sensors based on evanescent wave interactions on optical fibres are of great interest because of their advantages in a number of applications. Two mechanisms are used: direct spectroscopic sensing and reagent-mediated sensing. The theoretical design criteria underlying both approaches are presented. A novel approach is proposed whereby porous sol-gel glass coatings are used to enhance the performance of both types of evanescent wave sensor. The particular advantages obtained by applying the technique to a pH sensor based on dye fluorescence and a methane gas sensor based on infrared absorption are presented.

引用

页码：29 / 34

页数：6