Propagating density spikes in light-powered motility-ratchets

Lozano, Celia; Liebchen, Benno; ten Hagen, Borge; Bechinger, Clemens; Löwen, Hartmut

Propagating density spikes in light-powered motility-ratchets

Dateien

Lozano_2-14w09xnjnqnqq8.pdf(352.22 KB)

Datum

2019

Autor:innen

Lozano, Celia

Liebchen, Benno

ten Hagen, Borge

Bechinger, Clemens

Löwen, Hartmut

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Soft Matter ; 15 (2019), 26. - S. 5185-5192. - ISSN 1744-683X. - eISSN 1744-6848

Zusammenfassung

Combining experiments and computer simulations, we use a spatially periodic and flashing light-field to direct the motion of phototactic active colloids. Here, the colloids self-organize into a density spike pattern, which resembles a shock wave and propagates over long distances, almost without dispersing. The underlying mechanism involves a synchronization of the colloids with the light-field, so that particles see the same intensity gradient each time the light-pattern is switched on, but no gradient in between (for example). This creates pulsating transport whose strength and direction can be controlled via the flashing protocol and the self-propulsion speed of the colloids. Our results might be useful for drug delivery applications and can be used to segregate active colloids by their speed.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

LOZANO, Celia, Benno LIEBCHEN, Borge TEN HAGEN, Clemens BECHINGER, Hartmut LÖWEN, 2019. Propagating density spikes in light-powered motility-ratchets. In: Soft Matter. 15(26), pp. 5185-5192. ISSN 1744-683X. eISSN 1744-6848. Available under: doi: 10.1039/c9sm00727j

BibTex

@article{Lozano2019-07-03Propa-46018,
  year={2019},
  doi={10.1039/c9sm00727j},
  title={Propagating density spikes in light-powered motility-ratchets},
  number={26},
  volume={15},
  issn={1744-683X},
  journal={Soft Matter},
  pages={5185--5192},
  author={Lozano, Celia and Liebchen, Benno and ten Hagen, Borge and Bechinger, Clemens and Löwen, Hartmut}
}

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