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Jeong, Hoon Eui
Multiscale Biomimetics and Manufacturing Lab.
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Remote Manipulation of Droplets on a Flexible Magnetically Responsive Film

Author(s)
Kim, Jeong HunKang, Seong MinLee, Byung JunKo, HangilBae, Won-GyuSuh, KahpYangKwak, Moon KyuJeong, Hoon Eui
Issued Date
2015-12
DOI
10.1038/srep17843
URI
https://scholarworks.unist.ac.kr/handle/201301/17999
Fulltext
http://www.nature.com/articles/srep17843
Citation
SCIENTIFIC REPORTS, v.5, pp.17843
Abstract
The manipulation of droplets is used in a wide range of applications, from lab-on-a-chip devices to bioinspired functional surfaces. Although a variety of droplet manipulation techniques have been proposed, active, fast and reversible manipulation of pure discrete droplets remains elusive due to the technical limitations of previous techniques. Here, we describe a novel technique that enables active, fast, precise and reversible control over the position and motion of a pure discrete droplet with only a permanent magnet by utilizing a magnetically responsive flexible film possessing actuating hierarchical pillars on the surface. This magnetically responsive surface shows reliable actuating capabilities with immediate field responses and maximum tilting angles of ∼90°. Furthermore, the magnetic responsive film exhibits superhydrophobicity regardless of tilting angles of the actuating pillars. Using this magnetically responsive film, we demonstrate active and reversible manipulation of droplets with a remote magnetic force.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
WETTING PROPERTIESSURFACESWETTABILITY

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