Liquid Crystal-Based Detection of Air Contaminants Using Metal Surfaces
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United States of America Patent
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Oct 14, 2021
app pub date -
Jun 21, 2021
filing date -
Jan 10, 2018
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Abstract
Liquid crystal-based devices for detecting a target contaminant in air, including hydrogen, nitrogen dioxide, ozone, ammonia or carbon monoxide, and methods of using such devices to detect the target contaminant are disclosed. Such devices have a substrate surface that includes one or more metals or metal alloys that is in contact with a liquid crystal composition. When the device is contacted with a sample that contains the target contaminant, an observed change in the orientational ordering of the liquid crystal signals the presence of the target contaminant. In the absence of the target contaminant, no change in orientational ordering occurs.
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