Song Jiaqi, Zhang Jianhua, Krishna Mani Sanjana, Sen Ayusman
Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
Langmuir. 2022 Sep 20;38(37):11486-11491. doi: 10.1021/acs.langmuir.2c02108. Epub 2022 Sep 6.
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.
具有导向运动的液滴作为微反应器和输送载体具有潜在的应用价值。仅由光驱动的长距离迁移具有特别的优势，因为光可以远程施加、通过光掩模进行图案化，并且易于转换以照射指定位置。在此，我们描述了一个通用平台，该平台允许由紫外线或可见光控制的液滴进行快速定向导航和集体合并。水和油滴的导向运动遵循由光吸收性两亲性底物上的光热转换产生的密度驱动对流。由于相对较高的光热效率，可以使用低强度光束。此外，我们证明移动的液滴可以作为载体和按需反应室。
