液晶在气体传感领域的研究进展  

Research advancements of liquid crystal in gas sensing field

作　　者：周冬 刘永军 ZHOU Dong;LIU Yongjun(Key Lab of In-fiber Integrated Optics,Ministry Education of China,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学物理与光电工程学院光纤集成光学教育部重点实验室,黑龙江哈尔滨150001

出　　处：《液晶与显示》2024年第3期369-383,共15页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.U1531102)。

摘　　要：基于液晶的气体传感器是一个新兴的研究领域。液晶本身具有化学多样性、可逆的分子排列和固有的自组装能力,可以满足传感器高灵敏度、快速响应、低能耗和选择性等要求。随着相关研究的深入,液晶气体传感方法也不断被完善。本文回顾了近几年基于液晶的气体传感技术,讨论了现有液晶气体传感技术的检测方法,主要包括向列相液晶的气体检测方法和胆甾相液晶的气体传感方法。向列相液晶的气体传感包括功能化基板的液晶膜传感、特性几何形貌的液晶传感和液晶液滴传感方法。胆甾相液晶的气体传感主要包括聚合物胆甾相液晶膜的气体传感、液晶液滴传感、基于光纤的气体检测以及纤维素气体传感。最后对液晶气体传感的应用和发展进行了阐述。Gas sensors based on liquid crystals constitute an emerging research field.Due to the chemical diversity,reversible molecular arrangement,and inherent self-assembly capabilities of liquid crystals,they can satisfy the characteristics of high sensitivity,rapid response,low energy consumption,and selectivity in sensors.As related research advances,methods for liquid crystal gas sensing continue to be refined.This paper reviews recent years’liquid crystal-based gas sensing technology and discusses the existing methods for gas detection using liquid crystals,mainly including nematic liquid crystal gas detection methods and cholesteric liquid crystal gas sensing methods.Nematic liquid crystal gas sensing includes functionalized substrate liquid crystal film sensing,geometrically tailored liquid crystal sensing,and liquid crystal droplet sensing methods.Cholesteric liquid crystal gas sensing mainly includes gas sensing with polymer cholesteric liquid crystal films,liquid crystal droplet sensing,gas detection based on optical fibers,and cellulose gas sensing.Finally,the application and development of liquid crystal gas sensing are discussed.

关 键 词：气体传感 向列相液晶 胆甾相液晶 

分 类 号：O753.2[理学—晶体学]