Direct Observation of Hydrodynamic Rotation-Translation Coupling between Two Colloidal Spheres

by: S Martin, M Reichert, H Stark, T Gisler

Physical Review Letters, Vol. 97, No. 24. (2006)

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Abstract

By combining optical tweezers with polarization microscopy, the hydrodynamic coupling between position and orientation fluctuations in a pair of colloidal spheres has been measured. Imaging of birefringent particles under crossed polarizers allows for the simultaneous determination of the positions and orientations of both particles. The temporal cross-correlation function between random displacements of one particle and orientation fluctuations of its neighbor allows for the quantification of the hydrodynamic rotation-translation coupling between the spheres. Our results are in good agreement with predictions for the hydrodynamic mobility tensors calculated in the creeping-flow limit of the Navier-Stokes equation.

@article{citeulike:1431692, abstract = {By combining optical tweezers with polarization microscopy, the hydrodynamic coupling between position and orientation fluctuations in a pair of colloidal spheres has been measured. Imaging of birefringent particles under crossed polarizers allows for the simultaneous determination of the positions and orientations of both particles. The temporal cross-correlation function between random displacements of one particle and orientation fluctuations of its neighbor allows for the quantification of the hydrodynamic rotation-translation coupling between the spheres. Our results are in good agreement with predictions for the hydrodynamic mobility tensors calculated in the creeping-flow limit of the Navier-Stokes equation.}, author = {Martin, S. and Reichert, M. and Stark, H. and Gisler, T. }, citeulike-article-id = {1431692}, doi = {http://dx.doi.org/10.1103/PhysRevLett.97.248301}, journal = {Physical Review Letters}, keywords = {brownian, experiment}, number = {24}, posted-at = {2007-12-05 05:34:49}, priority = {2}, publisher = {APS}, title = {Direct Observation of Hydrodynamic Rotation-Translation Coupling between Two Colloidal Spheres}, url = {http://dx.doi.org/10.1103/PhysRevLett.97.248301}, volume = {97}, year = {2006} }

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TY - JOUR ID - citeulike:1431692 L3 - citeulike-article-id:1431692 TI - Direct Observation of Hydrodynamic Rotation-Translation Coupling between Two Colloidal Spheres JF - Physical Review Letters VL - 97 IS - 24 PB - APS N2 - By combining optical tweezers with polarization microscopy, the hydrodynamic coupling between position and orientation fluctuations in a pair of colloidal spheres has been measured. Imaging of birefringent particles under crossed polarizers allows for the simultaneous determination of the positions and orientations of both particles. The temporal cross-correlation function between random displacements of one particle and orientation fluctuations of its neighbor allows for the quantification of the hydrodynamic rotation-translation coupling between the spheres. Our results are in good agreement with predictions for the hydrodynamic mobility tensors calculated in the creeping-flow limit of the Navier-Stokes equation. KW - brownian KW - experiment AU - Martin, S AU - Reichert, M AU - Stark, H AU - Gisler, T PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.97.248301 ER -

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