A liquid crystal optical sensor for simple and quantitative determination of dimethyl methylphosphonate using laser speckle

Yuxiang Yan, Ning Bu, Xiaoquan Bai,Mei Wang,Yifei Ma,Suotang Jia,Xuyuan Chen,Zhaomin Tong

Optics and Lasers in Engineering（2023）

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摘要

•The orientation of liquid crystal changes when the phosphoryl group of DMMP binds to Cu2+.•The detection system is simpler because the crossed polarizers and the imaging lens are removed.•Quantitative determination of DMMP concentrations by calculating the correlation coefficients of speckle images.

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关键词

Liquid crystal,Laser speckle,Correlation coefficient,Organophosphorus vapor,4-cyano-4′-pentylbiphenyl

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