期刊
PHOTONIX
卷 2, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1186/s43074-021-00033-1
关键词
Superhydrophobic surface; Laser processing; Droplet chip; Droplet manipulation; On-chip analysis
类别
资金
- National Key Research and Development Program of China [2017YFB1104300]
- National Natural Science Foundation of China [61935008, 61522503, 61590930, 61775078, 61605055]
A novel self-propelled droplet manipulation strategy based on reconfigurable superhydrophobic chips was reported, utilizing modular droplet chips driven by gravity for dynamic manipulation of liquid droplets with reasonable anti-cross-contamination property due to the water repellence of the superhydrophobicity.
Natural creatures that enables controllable liquid transport provides the inspiration for developing novel microfluidic devices by engineering functional surfaces with superwettability. However, towards microfluidic applications, the strict requirements of sophisticated droplet manipulation make it challenging to reach this end. In this work, we report a conceptually new self-propelled droplet manipulation strategy based on reconfigurable superhydrophobic chips. The modular droplet chip (MDC) is developed by laser embossing a series of superhydrophobic structures on elastomer jigsaws that act as functional units. MDC is potable since only gravity is used as the driving force for dynamic manipulation of liquid droplets, including droplets transporting, splitting, merging and bouncing without mass loss. The MDC demonstrated reasonable anti-cross-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 portable experimental platform, the MDC is promising for next-generation lab-on-a-chip systems.
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