Active colloids under geometrical constraints in viscoelastic media
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Abstract 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. Graphic Abstract
2021 ◽
Vol 36
(3)
◽
pp. 165-176
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2021 ◽
Vol 2083
(2)
◽
pp. 022097
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1991 ◽
Vol 56
(10)
◽
pp. 2020-2029
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