Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Driving Droplets on Liquid Repellent Surfaces via Light-Driven Marangoni Propulsion

Authors
Hwang, H.Papadopoulos, P.Fujii, S.Wooh, Sanghyuk
Issue Date
2022
Publisher
John Wiley and Sons Inc
Keywords
droplet motion; liquid repellent surfaces; localized heating; Marangoni flow; thermocapillary convection
Citation
Advanced Functional Materials, v.32, no.15
Journal Title
Advanced Functional Materials
Volume
32
Number
15
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/53590
DOI
10.1002/adfm.202111311
ISSN
1616-301X
1616-3028
Abstract
Marangoni flow, a surface shear flow, is a promising option for propulsion when controlling liquid droplet motion on solid substrates. However, the applicability of Marangoni flow induced by heating the substrate for droplet manipulation is limited by low precision of motion control and a narrow range of substrate types. Herein, a novel noncontact light-driven droplet manipulation method by using photothermally active droplets is introduced. Marangoni flow is induced by local photothermal heating via near-infrared (NIR) irradiation resulting in an internal flow that drives the droplets. The photothermally active droplets slide away from the NIR light and the direction of motion can be precisely controlled by changing the irradiation position remotely. In addition, it is demonstrated that the addition of a miscible liquid to the droplets can reverse the direction of motion. Moreover, the authors show that spherical droplets on conventional liquid repellent surfaces move through a rolling mechanism instead of sliding. It is believed that this droplet manipulation method can provide a general way of droplet transportation on solid surfaces. © 2022 Wiley-VCH GmbH
Files in This Item
Appears in
Collections
College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Woo, Sanghyuk photo

Woo, Sanghyuk
공과대학 (화학공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE