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Issue 7, 2015
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Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film

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Abstract

Colloidal inclusions in lab-on-a-chip devices can be used to perform analytic operations in a non-invasive fashion. We demonstrate here a novel approach to realize fast and reversible micro-sieving operations by manipulating and transporting colloidal chains via mobile domain walls in a magnetic structured substrate. We show that this technique allows one to precisely move and sieve non-magnetic particles, to tweeze microscopic cargos or to mechanically compress highly dense colloidal monolayers.

Graphical abstract: Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film

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Submitted
19 Jan 2015
Accepted
05 Feb 2015
First published
05 Feb 2015

Lab Chip, 2015,15, 1765-1771
Article type
Paper

Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film

F. Martinez-Pedrero, A. V. Straube, T. H. Johansen and P. Tierno, Lab Chip, 2015, 15, 1765
DOI: 10.1039/C5LC00067J

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