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  Boundaries can steer active Janus spheres

Das, S., Garg, A., Campbell, A. I., Howse, J., Sen, A., Velegol, D., et al. (2015). Boundaries can steer active Janus spheres. Nature Communications, 6: 8999. doi:10.1038/ncomms9999.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-ACF9-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-ACFA-4
Genre: Journal Article

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Das, S., Author
Garg, A., Author
Campbell, A. I., Author
Howse, J., Author
Sen, A., Author
Velegol, D., Author
Golestanian, R.1, Author              
Ebbens, S. J., Author
Affiliations:
1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2570692              

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 Abstract: The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.

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Language(s): eng - English
 Dates: 2015-12-02
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/ncomms9999
BibTex Citekey: Das2015
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Title: Nature Communications
Source Genre: Journal
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Publ. Info: -
Pages: 10 Volume / Issue: 6 Sequence Number: 8999 Start / End Page: - Identifier: -