A shape-reconfigurable,light and magnetic dual-responsive shape-memory micropillar array chip for droplet manipulation

作     者：Wen-Qi Ye Wen-Xin Fu Xiao-Peng Liu Chun-Guang Yang Zhang-Run Xu Wen-Qi Ye;Wen-Xin Fu;Xiao-Peng Liu;Chun-Guang Yang;Zhang-Run Xu

作者机构：Research Center for Analytical SciencesNortheastern UniversityShenyang 110819China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第1期

页      面：456-460页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the Natural Science Foundation of China(No.21874015) the Fundamental Research Funds for the Central Universities(No.N2005024) 

主　　题：Microfluidics Droplet manipulation Micropillar array Shape memory polymer Magnetic response Light response 

摘      要：Droplet manipulation on an open surface has great potential in chemical analysis and biomedicine ***,most of the reported platforms designed for the manipulation of water droplets cannot thoroughly solve the problem of droplet ***,we report a shape-reconfigurable micropillar array chip for the manipulation of water droplets,oil droplets and water-in-oil ***-in-oil droplets provide an enclosed space for water droplets,preventing the evaporation in an open *** coated on the surface of the chip effectively reduces the droplet movement *** micropillar array chip has light and magnetic dual-response due to the Fe3O4 nanoparticles and the reduced iron powder mixed in the shape-memory *** micropillars irradiated by a near-infrared laser bend under the magnetic force,while the unirradiated micropillars still keep their original *** the absence of a magnetic field,when the micropillars in a temporary shape are irradiated by the near-infrared laser to the transition temperature,the micropillars return to their initial *** this process,the surface morphology gradient caused by the deformation of the micropillars and the surface tension gradient caused by the temperature change jointly produce the driving force of droplet movement.