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Sorting on periodic surfaces

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10.1103/PhysRevLett.94.160601
 
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hdl:2117/2512

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Lacasta Palacio, Ana MaríaMés informacióMés informacióMés informació
Sancho, Jose Maria
Romero, A. H.
Lindenberg, K.
Document typeArticle
Defense date2005-04-29
PublisherAmerican Physical Society
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Particles moving on crystalline surfaces and driven by external forces or ffow ffelds can acquire velocities along directions that deviate from that of the external force. This effect depends on characteristics of the particles, most notably particle size or particle index of refraction, and can therefore be (and has been) used to sort different particles. We introduce a simple model for particles subject to thermal uctuations and moving in appropriate potential landscapes. Numerical results are compared to recent experiments on landscapes produced with holographic optical tweezers and microfabricated technology. Our approach clariffes the relevance of different parameters, the direction and magnitude of the external force, particle size, and temperature.
CitationLacasta, A.M. et al. Sorting on periodic surfaces. "Physical Review Letters" 2005, vol. 94, núm. 16, p. 160601. 
URIhttp://hdl.handle.net/2117/2512
DOI10.1103/PhysRevLett.94.160601
ISSN0031-9007
Publisher versionhttp://link.aps.org/doi/10.1103/PhysRevLett.94.160601
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