Meiners, Jens-Christian and Quake, Stephen R. (1999) Direct Measurement of Hydrodynamic Cross Correlations between Two Particles in an External Potential. Physical Review Letters, 82 (10). pp. 2211-2214. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:MEIprl99
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We report a direct measurement of the hydrodynamic interaction between two colloidal particles. Two micron-sized latex beads were held at varying distances in optical tweezers while their Brownian displacements were measured. In spite of the fact that fluid systems at low Reynolds number are generally considered to have no “memory,” the cross-correlation function of the bead positions shows a pronounced, time-delayed anticorrelation. We show that the anticorrelations can be understood in terms of the standard Oseen tensor hydrodynamic coupling.
|Additional Information:||©1999 The American Physical Society Received 22 October 1998 We thank John Doyle, John Brady, Noel Corngold, and Michael Brenner for helpful discussions. This work was supported by NSF CAREER Grant No. PHY-9722417.|
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|Deposited On:||30 Dec 2006|
|Last Modified:||18 Sep 2014 18:11|
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