Stable Droplet Manipulation in Multiple Directions on a Magnetically Responsive Micropillar Array Surface

Xinyuan Liu; Li Jia; Yi Ding; Chao Dang; Liaofei Yin; Jinzhu Xu; Ruiqi Zhang

doi:10.1002/admi.202400728

Advanced Materials Interfaces (Apr 2025)

Stable Droplet Manipulation in Multiple Directions on a Magnetically Responsive Micropillar Array Surface

Xinyuan Liu,
Li Jia,
Yi Ding,
Chao Dang,
Liaofei Yin,
Jinzhu Xu,
Ruiqi Zhang

Affiliations

Xinyuan Liu: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Li Jia: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Yi Ding: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Chao Dang: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Liaofei Yin: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Jinzhu Xu: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China
Ruiqi Zhang: Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of Mechanical, Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China

DOI: https://doi.org/10.1002/admi.202400728
Journal volume & issue: Vol. 12, no. 7
pp. n/a – n/a

Abstract

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Abstract Droplets constitute an essential discrete form of liquids and are prevalent in both natural and industrial fields. Droplet manipulation technologies have broad application prospects in various fields, including biomedical devices, chemical engineering, water collection, and so on. The manipulation of surfaces with magnetic responsiveness has emerged as a pivotal technique in droplet control owing to its flexibility and precision in remote operations. In this study, the dynamic rolling behavior of low‐surface‐tension working fluids and water droplets on a superhydrophobic magnetically responsive micropillar array (SMMA) is investigated, with a focus on the mechanisms that generate instabilities during the directional rolling motion of droplets. The factors influencing these instabilities are studied using data analysis. Moreover, techniques for capturing and releasing droplets are investigated, offering significant insights into the efficient handling of minute amounts of liquids in experiments and the automation of intricate chemical processes.

Published in Advanced Materials Interfaces

ISSN: 2196-7350 (Online)
Publisher: Wiley-VCH
Country of publisher: Germany
LCC subjects: Science: Physics; Technology
Website: https://onlinelibrary.wiley.com/journal/21967350

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