摘要
通过在具有微米级沟槽(一个沟槽周期5μm)的玻璃基底上进行平面镀金,制备了具有相同沟槽周期的Au膜;并在Au膜上制备Cu2+修饰的巯基十一酸自组装敏感膜。向列相液晶5CB在Au膜基底上呈平行于Au膜沟槽的沿面排列;5CB在自组装敏感膜表面上的取向排列方式为垂直排列。通过检测甲基膦酸二甲酯时液晶织构的变化,表明5CB的取向排列方式由垂直排列转变为倾斜排列,并阐明了液晶型化学传感器的作用机理。首次证实以微米级沟槽状Au膜为基底制作的液晶型化学传感器可以用于检测目标化合物。
A5 μm topography and corrugation Au film was prepared on the glass slide (with 5 μm grooves), then a sensitive self-assembled monolayers modified by Cu^2+ terminated group --COOH of MUA SAMs were prepared on the Au film. The nematic liquid crystals 5CB adopt orientations that is planar alignment (parallel to the Au film grooves) and homeotropic alignment (perpendicular to the sensitive SAMs surface). The LC texture indicated that the orientation of 5CB changes from perpendicular to tilt. The mechanism of LC chemical sensor is illustrated by detecting dimethyl methylphosphorate. It is concluded for the first time that LC chemical sensor with suhstrates of a micron-scale topography and corrugation Au film can he used to detect targeted compound.
出处
《液晶与显示》
CAS
CSCD
北大核心
2006年第2期100-106,共7页
Chinese Journal of Liquid Crystals and Displays
基金
国防科研基金资助项目
关键词
液晶
取向
织构
自组装膜
传感器
甲基膦酸二甲酯
liquid crystals
orientation
texture
self-assembled monolayers
sensor
dimethyl methylphosphorate