Sorting on periodic surfaces
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 the...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2005 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/2512 |
| Acesso em linha: | https://hdl.handle.net/2117/2512 https://dx.doi.org/10.1103/PhysRevLett.94.160601 |
| Access Level: | acceso abierto |
| Palavra-chave: | Colloids Microfluidics Nanotechnology Research support Surface Properties Diffusion Nonlinear systems Nonlinear dynamics Sorting Transport on surfaces Periodic potentials Física Sistemes no lineals Àrees temàtiques de la UPC::Enginyeria química::Química física Àrees temàtiques de la UPC::Física |
| Resumo: | 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. |
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