期刊
LANGMUIR
卷 37, 期 1, 页码 578-584出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c03308
关键词
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资金
- National Natural Science Foundation of China [51875160]
- Fundamental Research Funds for the Central Universities [PA2020GDKC0010, WK2480000005]
- Natural Science Foundation of Jiangsu Province [BK20191209]
- Qing Lan Project of the Jiangsu Province Higher Education Institutions of China (2019)
- 226 High-level Talents Training Project of Nantong [2018-01]
A smart slippery surface has been developed that can alternately freeze/thaw a stretchable polydimethylsiloxane sheet to achieve on-demand control between sliding and pinning of water droplets, providing more possibilities in smart control of microscale droplets, especially in active vaccine-involved biochemical microreactions where a lower temperature is highly favored.
Responsive slippery lubricant-infused porous surfaces (SLIPSs), featuring excellent liquid repelling/sliding capabilities in response to external stimuli, have attracted great attention in smart droplet manipulations. However, most of the reported responsive SLIPSs function under a single stimulus. Here, we report a kind of smart slippery surface capable of on-demand control between sliding and pinning for water droplets via alternately freezing/thawing the stretchable polydimethylsiloxane sheet in different strains. Diverse parameters are quantified to investigate the critical sliding volume of the droplet, including lubricant infusion amount, laser-scanning power, and pillar spacing. By virtue of the cooperation of temperature and force fields acting on the SLIPS, we demonstrate the intriguing applications including controllable chemical reaction and on-demand electrical circuit control. We envision that this dual-responsive surface should providemore possibilities in smart control of microscale droplets, especially in active vaccine-involved biochemical microreactions where a lower temperature is highly favored.
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