Controlled surface-induced flows from the motion of self-assembled colloidal walkers
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Sing-2010-Controlled surface-i.pdf
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Author(s)
Sing, Charles E.
Schmid, Lothar
Schneider, Matthias F.
Franke, Thomas
Alexander-Katz, Alfredo
Date Issued
June 2009
Journal
Proceedings of the National Academy of Sciences of the United States of America
Publisher
National Academy of Sciences
Citation
Sing, Charles E. et al. “Controlled surface-induced flows from the motion of self-assembled colloidal walkers.” Proceedings of the National Academy of Sciences 107.2 (2010): 535 -540. Copyright ©2011 by the National Academy of Sciences
Version
Final published version
Abstract
Biological flows at the microscopic scale are important for the transport of nutrients, locomotion, and differentiation. Here, we present a unique approach for creating controlled, surface-induced flows inspired by a ubiquitous biological system, cilia. Our design is based on a collection of self-assembled colloidal rotors that “walk” along surfaces in the presence of a rotating magnetic field. These rotors are held together solely by magnetic forces that allow for reversible assembly and disassembly of the chains. Furthermore, rotation of the magnetic field allows for straightforward manipulation of the shape and motion of these chains. This system offers a simple and versatile approach for designing microfluidic devices as well as for studying fundamental questions in cooperative-driven motion and transport at the microscopic level.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1073/pnas.0906489107
