Droplet Navigation by Photothermal Pumping in an Optofluidic System

Jiaqi Song; Jianhua Zhang; Sanjana Krishna Mani; Ayusman Sen

doi:10.1021/acs.langmuir.2c02108

Droplet Navigation by Photothermal Pumping in an Optofluidic System

Jiaqi Song, Jianhua Zhang, Sanjana Krishna Mani, Ayusman Sen

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	11486-11491
Number of pages	6
Journal	Langmuir
Volume	38
Issue number	37
DOIs	https://doi.org/10.1021/acs.langmuir.2c02108
State	Published - Sep 20 2022

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/acs.langmuir.2c02108

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abstract = "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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AU - Song, Jiaqi

AU - Zhang, Jianhua

AU - Krishna Mani, Sanjana

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Y1 - 2022/9/20

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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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Droplet Navigation by Photothermal Pumping in an Optofluidic System

Abstract

All Science Journal Classification (ASJC) codes

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