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Sensing characteristics of chemical agents by using liquid crystal-based chemical and biological sensors

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5 Author(s)
Jun Namkung ; Electrical and Computer Engineering Department, University of Alabama in Huntsville, 35899 USA ; Yang Zou ; Dan Ke ; Yongbin Lin
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This paper reports the design of a microstructure comprising an interdigitated capacitance structure for the detection of vapor-phase analytes based on nematic liquid crystal (NLC) sensor. The NLC sensor is tested by using demethyl-methylphosphonate (DMMP) detection to change the orientational response of the liquid crystal molecules and demonstrated by the optical monitoring as well as the capacitive monitoring. Finally, vapor-phase analyte concentrations down to the parts-per-billion (ppb) level have been tested.

Published in:

Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on

Date of Conference:

16-21 May 2010