Jump to main content
Jump to site search

Issue 14, 2012
Previous Article Next Article

Particle sorting by a structured microfluidic ratchet device with tunable selectivity: theory and experiment

Author affiliations

Abstract

We theoretically predict and experimentally demonstrate that several different particle species can be separated from each other by means of a ratchet device, consisting of periodically arranged triangular (ratchet) shaped obstacles. We propose an explicit algorithm for suitably tailoring the externally applied, time-dependent voltage protocol so that one or several, arbitrarily selected particle species are forced to migrate oppositely to all the remaining species. As an example we present numerical simulations for a mixture of five species, labelled according to their increasing size, so that species 2 and 4 simultaneously move in one direction and species 1, 3, and 5 in the other. The selection of species to be separated from the others can be changed at any time by simply adapting the voltage protocol. This general theoretical concept to utilize one device for many different sorting tasks is experimentally confirmed for a mixture of three colloidal particle species.

Graphical abstract: Particle sorting by a structured microfluidic ratchet device with tunable selectivity: theory and experiment

Back to tab navigation

Publication details

The article was received on 27 Oct 2011, accepted on 25 Jan 2012 and first published on 28 Feb 2012


Article type: Paper
DOI: 10.1039/C2SM07053G
Soft Matter, 2012,8, 3900-3907

  •   Request permissions

    Particle sorting by a structured microfluidic ratchet device with tunable selectivity: theory and experiment

    L. Bogunovic, R. Eichhorn, J. Regtmeier, D. Anselmetti and P. Reimann, Soft Matter, 2012, 8, 3900
    DOI: 10.1039/C2SM07053G

Search articles by author

Spotlight

Advertisements