Laser fabrication of modular superhydrophobic chips for reconfigurable assembly and self-propelled droplet manipulation  

作　　者：Huan Wang Yong-Lai Zhang Dong-Dong Han Wei Wang Hong-Bo Sun 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,2699 Qianjin Street,Changchun 130012,China [2]Hooke Instruments,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [3]State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Haidian,Beijing 100084,China.

出　　处：《PhotoniX》2021年第1期186-198,共13页智汇光学（英文）

基　　金：National Key Research and Development Program of China(2017YFB1104300);National Natural Science Foundation of China(61935008,61522503,61590930,61775078,and 61605055).

摘　　要：Natural creatures that enables controllable liquid transport provides the inspiration fordeveloping novel microfluidic devices by engineering functional surfaces withsuperwettability. However, towards microfluidic applications, the strict requirements ofsophisticated droplet manipulation make it challenging to reach this end. In this work,we report a conceptually new self-propelled droplet manipulation strategy based onreconfigurable superhydrophobic chips. The modular droplet chip (MDC) is developedby laser embossing a series of superhydrophobic structures on elastomer jigsaws thatact as functional units. MDC is potable since only gravity is used as the driving force fordynamic manipulation of liquid droplets, including droplets transporting, splitting,merging and bouncing without mass loss. The MDC demonstrated reasonable anticross-contamination property due to the water repellence of the superhydrophobicity.Modular assembly of MDC enables different chip functions including solution dilution,SERS detection, cell labeling and chemical synthesis. As a miniature and portableexperimental platform, the MDC is promising for next-generation lab-on-a-chip systems.

关 键 词：Superhydrophobic surface Laser processing Droplet chip Droplet manipulation On-chip analysis 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]