Next Article in Journal
Quantum Theory from Rules on Information Acquisition
Next Article in Special Issue
Brownian Dynamics Computational Model of Protein Diffusion in Crowded Media with Dextran Macromolecules as Obstacles
Previous Article in Journal
Effect of a Magnetic Quadrupole Field on Entropy Generation in Thermomagnetic Convection of Paramagnetic Fluid with and without a Gravitational Field
Previous Article in Special Issue
Energy Transfer between Colloids via Critical Interactions
Open AccessArticle

Taxis of Artificial Swimmers in a Spatio-Temporally Modulated Activation Medium

Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany
Nanosystems Initiative Munich, Schellingstraße 4, D-80799 München, Germany
Department of Physics, National University of Singapore, 117551 Singapore, Singapore
Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy
Author to whom correspondence should be addressed.
Academic Editors: Giancarlo Franzese, Ivan Latella and Miguel Rubi
Entropy 2017, 19(3), 97;
Received: 19 January 2017 / Revised: 23 February 2017 / Accepted: 27 February 2017 / Published: 3 March 2017
(This article belongs to the Special Issue Nonequilibrium Phenomena in Confined Systems)
Contrary to microbial taxis, where a tactic response to external stimuli is controlled by complex chemical pathways acting like sensor-actuator loops, taxis of artificial microswimmers is a purely stochastic effect associated with a non-uniform activation of the particles’ self-propulsion. We study the tactic response of such swimmers in a spatio-temporally modulated activating medium by means of both numerical and analytical techniques. In the opposite limits of very fast and very slow rotational particle dynamics, we obtain analytic approximations that closely reproduce the numerical description. A swimmer drifts on average either parallel or anti-parallel to the propagation direction of the activating pulses, depending on their speed and width. The drift in line with the pulses is solely determined by the finite persistence length of the active Brownian motion performed by the swimmer, whereas the drift in the opposite direction results from the combination of the ballistic and diffusive properties of the swimmer’s dynamics. View Full-Text
Keywords: microswimmers; taxis; inhomogeneous activating medium microswimmers; taxis; inhomogeneous activating medium
Show Figures

Figure 1

MDPI and ACS Style

Geiseler, A.; Hänggi, P.; Marchesoni, F. Taxis of Artificial Swimmers in a Spatio-Temporally Modulated Activation Medium. Entropy 2017, 19, 97.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop