Complex Systems and Biological Physics Seminars

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

Name: Particle sorting by a structured microﬂuidic ratchet device with tunable selectivity: theory and experiment
Start: 2014-02-18T13:30:00+01:00
End: 2014-02-18T14:30:00+01:00
Location: No location set

by Ralf Eichhorn (Nordita)

Tuesday 18 Feb 2014, 13:30 → 14:30 Europe/Stockholm

122:026

Description

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 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 examples we present numerical simulations for a mixture of ﬁve species, and experimental results for a mixture of three colloidal particle species.