Journal
ACS NANO
Volume 9, Issue 5, Pages 4717-4725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b01518
Keywords
nanopropulsion; magnetic actuation; glancing angle deposition; active matter; independent control; nanomotors
Categories
Funding
- Department of Biotechnology
- Ministry of Communication and Information Technology
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There is considerable interest in powering and maneuvering nanostructures remotely in fluidic media using noninvasive fuel-free methods, for which small homogeneous magnetic fields are ideally suited. Current strategies include helical propulsion of chiral nanostructures, cilia-like motion of flexible filaments, and surface assisted translation of asymmetric colloidal doublets and magnetic nanorods, in all of which the individual structures are moved in a particular direction that is completely tied to the characteristics of the driving fields. As we show in this paper, when we use appropriate magnetic field configurations and actuation time scales, it is possible to maneuver geometrically identical nanostructures in different directions, and subsequently position them at arbitrary locations with respect to each other. The method reported here requires proximity of the nanomotors to a solid surface, and could be useful in applications that require remote and independent control over individual components in microfluidic environments.
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