On-demand light-driven release of droplets stabilized via a photoresponsive fluorosurfactant  

作　　者：Guangyao Cheng Qinru Xiao Chit Yau Kuan Yi-Ping Ho 

机构地区：[1]Department of Biomedical Engineering,The Chinese University of Hong Kong,Hong Kong SAR,China [2]Centre for Novel Biomaterials,The Chinese University of Hong Kong,Hong Kong SAR,China [3]Hong Kong Branch of CAS Center for Excellence in Animal Evolution and Genetics,The Chinese University of Hong Kong,Hong Kong SAR 999077,China [4]The Ministry of Education Key Laboratory of Regeneration Medicine,The Chinese University of Hong Kong,Hong Kong SAR,China

出　　处：《Microsystems & Nanoengineering》2023年第4期223-231,共9页微系统与纳米工程（英文）

基　　金：The authors would like to acknowledge the support provided by the Research Grants Council of the Hong Kong Special Administrative Region,China(project no.:CUHK 14204820 and 14207121);Hong Kong Innovation and Technology Fund(ITS/217/21);the VC Discretionary Fund provided by the Chinese University of Hong Kong(project#:8601014).

摘　　要：Water-in-oil droplets have emerged as promising microreactors for high-throughput biochemical analysis due to their features of reduced sample consumption and automated operation.For a typical screening application,droplets are often trapped for continuous monitoring of the reaction over an extended period,followed by the selective retrieval of targeted droplets based on the after-effect of biochemical reactions.While techniques for droplet trapping are well developed,retrieval of targeted droplets mainly demands complicated device fabrication or sophisticated control.Herein,facile and rapid selective droplet release is achieved by utilizing a new class of photoresponsive fluorosurfactant based on plasmonic nanoparticles.The intense photothermal response provided by this novel photoresponsive fluorosurfactant is capable of vaporizing the fluorocarbon oil at the droplet interface under laser illumination,resulting in a bubble releasing a trapped droplet on demand.A fully automated fluorescence-activated droplet release platform has also been developed to demonstrate its potential for droplet-based large-scale screening applications.

关 键 词：SURFACTANT RELEASE STABILIZED 

分 类 号：TB383[一般工业技术—材料科学与工程]