期刊
LANGMUIR
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.2c02108
关键词
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资金
- Department of Energy, Office of Basic Energy Sciences [DOE-DE-SC0020964]
- U.S. Department of Energy (DOE) [DE-SC0020964] Funding Source: U.S. Department of Energy (DOE)
This study introduces a new method for controlling the movement and merging of droplets using either ultraviolet or visible light. By utilizing photothermal conversion, efficient density-driven convective flows are achieved, enabling fast navigation and collective merging. Furthermore, the study demonstrates the potential of these moving droplets as carriers and reaction chambers.
Droplets with guided motion have potential applications as microreactors and delivery vehicles. Directing long-range migration powered solely by light is particularly advantageous since light can be applied remotely, patterned with a photomask, and readily translated to irradiate specified locations. Herein, we describe a universal platform that allows fast directional navigation and collective merging of droplets controlled by either ultraviolet or visible light. The guided motion of water and oil droplets follows density-driven convective flows arising from photothermal conversion at a light-absorbing amphiphobic substrate. Because of the relatively high photothermal efficiency, a low-intensity light beam can be employed. Further, we demonstrate that the moving droplets can function as carriers and on-demand reaction chambers.
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