Liquid crystal nose, chiral case: towards increased selectivity and low detection limits

In this paper, we describe a simple prototype of an olfaction system based on chiral liquid crystals (LCs) and suitable for sensing volatile organic compounds (VOCs). The detection of small concentrations of VOCs is based on measuring weak colour fluctuations on the surface of the LC droplet. Detect...

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Bibliographic Details
Published inLiquid crystals Vol. 46; no. 9; pp. 1309 - 1317
Main Authors Shibaev, P.V., Carrozzi, D., Vigilia, L., DeWeese, Haley
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 15.07.2019
Taylor & Francis Ltd
Subjects
cholesteric volatile organic compound
Color
Crystals
Detection limits
Droplets
electronic nose
gas detection
LC nose
Liquid crystals
Nose
Olfaction
Organic compounds
Selectivity
Variation
VOC
VOCs
Volatile organic compounds
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Summary:In this paper, we describe a simple prototype of an olfaction system based on chiral liquid crystals (LCs) and suitable for sensing volatile organic compounds (VOCs). The detection of small concentrations of VOCs is based on measuring weak colour fluctuations on the surface of the LC droplet. Detection of larger concentrations is based on measuring colour changes (or shift of the selective reflection band) and isotropisation transition of the whole droplet. Thus, a broad range of VOC concentrations can be detected by this LC nose.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2018.1558462