TY - JOUR
T1 - Droplet Navigation by Photothermal Pumping in an Optofluidic System
AU - Song, Jiaqi
AU - Zhang, Jianhua
AU - Krishna Mani, Sanjana
AU - Sen, Ayusman
N1 - Funding Information:
We thank Dr. Lauren Zarzar and Nate Sturniolo for their help with this work. The work was funded by the Department of Energy, Office of Basic Energy Sciences (DOE-DE-SC0020964).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/9/20
Y1 - 2022/9/20
N2 - 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.
AB - 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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U2 - 10.1021/acs.langmuir.2c02108
DO - 10.1021/acs.langmuir.2c02108
M3 - Article
C2 - 36067338
AN - SCOPUS:85137867675
SN - 0743-7463
VL - 38
SP - 11486
EP - 11491
JO - Langmuir
JF - Langmuir
IS - 37
ER -