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Open AccessReview

Review: Interactions of Active Colloids with Passive Tracers

Institute of Physical Chemistry, TU Dresden, Zellescher Weg 19, 01062 Dresden, Germany
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Condens. Matter 2019, 4(3), 78; https://doi.org/10.3390/condmat4030078
Received: 28 June 2019 / Revised: 9 August 2019 / Accepted: 21 August 2019 / Published: 23 August 2019
(This article belongs to the Special Issue Dynamics of Active Matter)
Collective phenomena existing universally in both biological systems and artificial active matter are increasingly attracting interest. The interactions can be grouped into active-active and active-passive ones, where the reports on the purely active system are still clearly dominating. Despite the growing interest, summarizing works for active-passive interactions in artificial active matter are still missing. For that reason, we start this review with a general introduction, followed by a short spotlight on theoretical works and then an extensive overview of experimental realizations. We classify the cases according to the active colloids’ mechanisms of motion and discuss the principles of the interactions. A few key applications of the active-passive interaction of current interest are also highlighted (such as cargo transport, flow field mapping, assembly of structures). We expect that this review will help the fundamental understanding and inspire further studies on active matter. View Full-Text
Keywords: active colloids; active-passive interaction; collective phenomena active colloids; active-passive interaction; collective phenomena
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Wang, L.; Simmchen, J. Review: Interactions of Active Colloids with Passive Tracers. Condens. Matter 2019, 4, 78.

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