Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film
arXiv:1601.01030 · doi:10.1039/c5lc00067j
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 to precisely move and sieve non-magnetic particles, to tweeze microscopic cargos or to mechanically compress highly dense colloidal monolayers.
7 pages, 6 figures, published in Lab on a Chip