传感技术学报2011，Vol.24Issue(10)：1386-1390,5.DOI:10.3969/j.issn.1004-1699.2011.10.003
液晶化学传感器制备及在有机磷农药检测中的应用研究
Preparation of Liquid Crystal Chemical Sensor and Study on Application of Organophosphorus Pesticides Detection
摘要
Abstract
A novel liquid crystal (LC) based chemical sensor was prepared as follows: the sensitive films on ordinary glass slides were deposited by microcontact printing method and then modified using active locus, the copper grids were placed on sensitive films to fit liquid crystal ( E7) films. The experimental results show that E7 molecule underwent transition from a homeotropic orientation to a planar one upon exposure to organophosphate pesticides vapor;the minimum detection limit response to common organophosphate pesticides reached 0. 051 g/m3;the sensors could detect 0.114 g/m3 of DDVP over 50 times. Furthermore,this kind of sensor exhibited high selectivity and thermal adaptability, demonstrating the feasibility of using these devices in the detection and identification of positive organophosphate pesticides in environment.关键词
传感器/液晶/微接触印刷法/有机磷Key words
sensor/ liquid crystal/ microcontact printing/ Organophosphate分类
信息技术与安全科学引用本文复制引用
王普红,余建华,李志军,郑清元..液晶化学传感器制备及在有机磷农药检测中的应用研究[J].传感技术学报,2011,24(10):1386-1390,5.基金项目
国防科研基金项目 （）
