摘要
微量液体的精确操控在生物医药、液体传输等领域具有广泛的应用价值.目前,基于光诱导的毛细作用力操控液体的方法引起了人们极大的兴趣,因为这类方法在操控过程中无需特殊的光学装置和复杂的微组装过程.但是目前报道的方法只适用于少数特定的液体,并且驱动距离短、运动速度慢、局限于直线运动.最近,俞燕蕾等设计了一种新型结构的侧链液晶高分子材料,以此制备了液晶高分子微管执行器,可以通过不对称光致形变诱导毛细作用力,实现了光控各种类型液体按照设计的速度和方向运动,有望在可控微流体传输、微反应系统、微机械系统、芯片实验室等领域展现出巨大的应用价值.
Precisely manipulating small amounts of liquids has been widely applied in industry, ranging from biomedical devices to liquid transfer. Currently, direct light-driven manipulation of liquids, especially those triggered by light-induced capillary forces has drawn an increasing attention, because it requires neither special optical set-up nor complex microfabrication steps. However,the capillary force arising from wettability gradient is too small to overcome the effect of contact line pinning, and the motion is thus limited to specific liquids with a relatively short distance, simple linear trajectories, and low speed, Here, Yu et al. at Fudan University reported a new strategy to precisely manipulate liquids by photo-induced asymmetric deformation of tubular microactuators,which is a novel principle to induce capillary forces. These microactuators exhibit the unique capabilities to propel a wide diversity of liquids over a long distance with desirable velocity and controllable direction. Application in areas such as micro-opto-mechanical systems and optofluidics is highly anticipated.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2016年第10期1281-1283,共3页
Acta Polymerica Sinica
关键词
液体操控
液晶高分子
光致形变
执行器
Controlled liquid motion, Liquid crystalline polymer, Photodeformation, Actuators
作者简介
通讯联系人，E—mail：xi@mail．tsinghua．edu．cn
