Description: Giant adsorption of microswimmers: Duality of shape asymmetry and wall curvature

This title appears in the Scientific Report : 2015

Giant adsorption of microswimmers: Duality of shape asymmetry and wall curvature

The effect of shape asymmetry of microswimmers on their adsorption capacity at confining channel walls is studied by a simple dumbbell model. For a shape polarity of a forward-swimming cone, like the stroke-averaged shape of a sperm, extremely long wall retention times are found, caused by a nonvani...

Personal Name(s):	Wysocki, Adam (Corresponding Author)
	Elgeti, Jens / Gompper, Gerhard
Contributing Institute:	Theorie der Weichen Materie und Biophysik; IAS-2 Theorie der Weichen Materie und Biophysik; ICS-2
Published in:	Physical Review E Physical review / E, 91 91 (2015 2015) 5 5, S. 050302 050302
Imprint:	College Park, Md. APS 2015 2015-05-28 2015-05-01
DOI:	10.1103/PhysRevE.91.050302
Document Type:	Journal Article
Research Program:	Physical Basis of Diseases
Link:	OpenAccess OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://hdl.handle.net/2128/8748 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevE.91.050302 in citations.

The effect of shape asymmetry of microswimmers on their adsorption capacity at confining channel walls is studied by a simple dumbbell model. For a shape polarity of a forward-swimming cone, like the stroke-averaged shape of a sperm, extremely long wall retention times are found, caused by a nonvanishing component of the propulsion force pointing steadily into the wall, which grows exponentially with the self-propulsion velocity and the shape asymmetry. A direct duality relation between shape asymmetry and wall curvature is proposed and verified. Our results are relevant for the design microswimmer with controlled wall-adhesion properties. In addition, we confirm that pressure in active systems is strongly sensitive to the details of the particle-wall interactions.