title: Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film.
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.
authors: Departament de Estructura i Constituents de la Matèria, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain. ptierno@ub.edu.
authors: Fernando
authors: F
authors: Martinez-Pedrero
authors: Arthur V
authors: AV
authors: Straube
authors: Tom H
authors: TH
authors: Johansen
authors: Pietro
authors: P
authors: Tierno
mesh_terms: D003102:Colloids / Q000737:chemistry*; D056656:Lab-On-A-Chip Devices; D059346:Magnets; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*
chemical_list: D003102:Colloids