Title :
Liquid Crystal Sensors with Capacitive Transduction
Author :
Lindquist, Robert G. ; Abu-Abed, Alaeddin ; Choi, Woo-Hyuck
Author_Institution :
Alabama Univ., Huntsville
Abstract :
In this paper, the theory for tracking the average molecular orientation of a liquid crystal material via capacitive sensing of anisotropic media is presented. Tracking the director axis of a nematic liquid crystal material can be achieved by two capacitance measurements. The sensitivity for the sensor at different alignments is studied. Both the experimental and calculated values for fringing capacitances of a selected interdigitated fingers sensor are presented.
Keywords :
anisotropic media; capacitive sensors; liquid crystal devices; nematic liquid crystals; anisotropic media; capacitance measurements; capacitive transduction; interdigitated fingers sensor; liquid crystal sensors; molecular orientation tracking; nematic liquid crystal material; Anisotropic magnetoresistance; Biosensors; Capacitance measurement; Capacitive sensors; Chemical and biological sensors; Crystalline materials; Electrodes; Fingers; Liquid crystals; Permittivity;
Conference_Titel :
Sensors, 2006. 5th IEEE Conference on
Conference_Location :
Daegu
Print_ISBN :
1-4244-0375-8
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2007.355878
