Type of Publication: | Journal article |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-2-14w09xnjnqnqq8 |
Author: | Lozano, Celia; Liebchen, Benno; ten Hagen, Borge; Bechinger, Clemens; Löwen, Hartmut |
Year of publication: | 2019 |
Published in: | Soft Matter ; 15 (2019), 26. - pp. 5185-5192. - ISSN 1744-683X. - eISSN 1744-6848 |
Pubmed ID: | 31168529 |
DOI (citable link): | https://dx.doi.org/10.1039/c9sm00727j |
Summary: |
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.
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Subject (DDC): | 530 Physics |
Link to License: | In Copyright |
Bibliography of Konstanz: | Yes |
Refereed: | Yes |
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
@article{Lozano2019-07-03Propa-46018, title={Propagating density spikes in light-powered motility-ratchets}, year={2019}, doi={10.1039/c9sm00727j}, 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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