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Use of Anisotropic Materials as Chemical Detectors

 

作者: ThaddeusJ. Novak,   EdwardJ. Poziomek,   RaymondA. Mackay,  

 

期刊: Analytical Letters  （Taylor Available online 1972）
卷期: Volume 5, issue 3  

页码: 187-192

 

ISSN:0003-2719

 

年代: 1972

 

DOI:10.1080/00032717208066106

 

出版商: Taylor & Francis Group

 

关键词: anisotropy;polarizers;liquid crystals;membrane filters;polymer degradation;vapor detection

 

数据来源: Taylor

 

摘要:

The visual detection between crossed polarizers, of organic vapors on various liquid crystal films is reported. Non-selective detection is achieved in the ppm range. However, opportunities exist for bettering selectivity and sensitivity as illustrated with a combined polymer-liquid crystal detection system for amines. Also described is the detection of liquid droplets by utilizing changes in the birefringence of polycarbonate membrane filters.

 

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