Title

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

RIS ID

99441

Publication Details

Martinez-Pedrero, F., Straube, A. V., Johansen, T. H. & Tierno, P. (2015). Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film. Lab on a Chip: miniaturisation for chemistry, physics, biology, materials science and bioengineering, 15 (7), 1765-1771.

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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1039/c5lc00067j