Capacitive transduction for liquid crystal-based sensors, part I: Ordered system

被引：16

作者：

Abu-Abed, Alaeddin ^{[1
]}

Lindquist, Robert G. ^{[1
]}

Choi, Woo-Hyuck ^{[1
]}

机构：

[1] Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA

来源：

IEEE SENSORS JOURNAL | 2007年 / 7卷 / 11-12期

基金：

美国国家科学基金会;

关键词：

biosensors; capacitive sensing; chemical sensors; liquid crystal (LC);

D O I：

10.1109/JSEN.2007.908504

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, the theory for tracking the average molecular orientation of a liquid crystal (LC) material via capacitive sensing of anisotropic media is presented. The candidate LC sensor structure utilizes interdigital electrodes. Two capacitive measurements in orthogonal direction can track the director axis of nematic LC material in a homogenous ordered LC film. The sensitivity for the sensor at different alignments is studied. The candidate sensors have been fabricated and experimentally verified. Both experimental and calculated values for capacitances of selected interdigital fingers sensor structures are presented.

引用

页码：1617 / 1624

页数：8

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