Title :
Sensing characteristics of chemical agents by using liquid crystal-based chemical and biological sensors
Author :
Namkung, Jun ; Zou, Yang ; Ke, Dan ; Lin, Yongbin ; Lindquis, Robert G.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of Alabama in Huntsville, Huntsville, AL, USA
Abstract :
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.
Keywords :
Biosensors; Capacitance; Capacitive sensors; Chemical and biological sensors; Crystal microstructure; Liquid crystals; Monitoring; Optical sensors; Sensor phenomena and characterization; Testing;
Conference_Titel :
Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
Conference_Location :
San Jose, CA, USA
Print_ISBN :
978-1-55752-890-2
Electronic_ISBN :
978-1-55752-890-2
