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Remote Manipulation of Droplets on a Flexible Magnetically Responsive Film.


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.

SUBMITTER: Kim JH 

PROVIDER: S-EPMC4673453 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Remote Manipulation of Droplets on a Flexible Magnetically Responsive Film.

Kim Jeong Hun JH   Kang Seong Min SM   Lee Byung Jun BJ   Ko Hangil H   Bae Won-Gyu WG   Suh Kahp Yang KY   Kwak Moon Kyu MK   Jeong Hoon Eui HE  

Scientific reports 20151209


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 wit  ...[more]

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