title: Giant adsorption of microswimmers: Duality of shape asymmetry and wall curvature.
abstract: 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.
authors.affiliation: Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany.
authors.forename: Adam
authors.initials: A
authors.lastname: Wysocki
authors.affiliation: Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Elgeti
authors.affiliation: Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Gompper
mesh_terms: D000327:Adsorption; D000818:Animals; D002417:Cattle; D002696:Chlamydomonas / Q000502:physiology; D008297:Male; D008954:Models, Biological; D009068:Movement; D013094:Spermatozoa / Q000502:physiology