Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 107, Issue 2, Pages 535-540Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0906489107
Keywords
Biological flows; Cilia; Magnetic; Microfluidics; Transport
Categories
Funding
- MIT-Dupont Alliance
- DFG [SFB 486, SPP-1313, SPP-1164]
- Cluster of Excellence via NIM
- BMBF
- Elite Netz-werk Bayern (Complnt)
- Bayrische Forschungsstiftung
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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.
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