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Active colloids under geometrical constraints in viscoelastic media

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2021

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The European physical journal E, Soft matter. Springer. 2021, 44(3), 28. ISSN 1292-8941. eISSN 1292-895X. Available under: doi: 10.1140/epje/s10189-021-00033-w

Zusammenfassung

We study the behavior of active particles (APs) moving in a viscoelastic fluid in the presence of geometrical confinements. Upon approaching a flat wall, we find that APs slow down due to compression of the enclosed viscoelastic fluid. In addition, they receive a viscoelastic torque leading to sudden orientational changes and departure from walls. Based on these observations, we develop a numerical model which can also be applied to other geometries and yields good agreement with experimental data. Our results demonstrate, that APs are able to move through complex geometrical structures more effectively when suspended in a viscoelastic compared to a Newtonian fluid.

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530 Physik

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ISO 690NARINDER, Narinder, Wei-Jing ZHU, Clemens BECHINGER, 2021. Active colloids under geometrical constraints in viscoelastic media. In: The European physical journal E, Soft matter. Springer. 2021, 44(3), 28. ISSN 1292-8941. eISSN 1292-895X. Available under: doi: 10.1140/epje/s10189-021-00033-w
BibTex
@article{Narinder2021-03-11Activ-53380,
  year={2021},
  doi={10.1140/epje/s10189-021-00033-w},
  title={Active colloids under geometrical constraints in viscoelastic media},
  number={3},
  volume={44},
  issn={1292-8941},
  journal={The European physical journal E, Soft matter},
  author={Narinder, Narinder and Zhu, Wei-Jing and Bechinger, Clemens},
  note={Article Number: 28}
}
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