Phys. Rev. Lett. 99, 138303 (2007) [4 pages]Asymmetry in Colloidal Diffusion near a Rigid WallReceived 18 May 2007; published 28 September 2007 The three-dimensional motion of single colloidal particles close to a plane wall is measured by optical microscopy. In accordance with classical theoretical predictions, we find an asymmetric motion of the particles in the directions parallel and perpendicular to the wall. We also find that, close to the wall, the distribution functions of perpendicular steps are asymmetric, being shorter toward the wall and longer away from it. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.138303
DOI:
10.1103/PhysRevLett.99.138303
PACS:
82.70.Dd, 05.40.−a, 47.60.+i, 83.50.Ha
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