Remote Manipulation of Droplets on a Flexible Magnetically Responsive Film.

Citation data:

Scientific reports, ISSN: 2045-2322, Vol: 5, Issue: 1, Page: 17843

Publication Year:
2015
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Citations 8
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/17999
PMID:
26648418
DOI:
10.1038/srep17843
PMCID:
PMC4673453
Author(s):
Kim, Jeong Hun; Kang, Seong Min; Lee, Byung Jun; Ko, Hangil; Bae, Won-Gyu; Suh, Kahp Yang; Kwak, Moon Kyu; Jeong, Hoon Eui
Publisher(s):
Springer Nature; NATURE PUBLISHING GROUP
Tags:
Multidisciplinary; WETTING PROPERTIES; SURFACES; WETTABILITY
article description
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.