SUPRAMOLECULAR AND POLYMERIC STRUCTURES FOR GAS SENSORS

被引:44
作者
GOPEL, W [1 ]
机构
[1] UNIV TUBINGEN,CTR INTERFACE ANAL & SENSORS,D-72076 TUBINGEN,GERMANY
关键词
GAS SENSORS; MOLECULAR RECOGNITION; POLYMERIC STRUCTURES; SUPRAMOLECULAR STRUCTURES;
D O I
10.1016/0925-4005(95)85007-4
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Molecular, supramolecular and polymeric compounds are particularly suitable for tailoring chemically sensitive coatings of thin-film gas sensors to monitor volatile organic compounds (VOCs). The molecular recognition occurs either by specific key/lock interactions in the first monolayer, or by incorporation in the bulk. The separation of surface reactions from bulk dissolution effects is deduced from the thickness dependence of sensor effects of 'prototype materials', which show different mechanisms of molecular recognition. Experimental and theoretical concepts for fine-tuning sensor properties by an empirical optimization or theoretical understanding of sensing mechanism are stressed. This requires extra information about the thin-film structures obtained from additional microscopic and spectroscopic investigations.
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页码:17 / 32
页数:16
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