Measurement of the hydrodynamic forces between two polymer-coated spheres

Preprint

14 December 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0012271

Abstract

The hydrodynamic forces between Brownian spheres are determined from a measurement of the correlated thermal fluctuations in particle position using a new method, two-particle cross-correlation spectroscopy (TCS). A pair of 1.3 um diameter polymer-coated poly(methyl methacrylate) were held at separations of between 2 um and 20 um using optical traps. The mobility tensor is determined directly from the statistically-averaged Brownian fluctuations of the two spheres. The observed distance dependence of the mobility tensor is in quantitative agreement with low-Reynolds number calculations.

Keywords

METHYL METHACRYLATE
HYDRODYNAMIC FORCES
REYNOLDS NUMBER
POLYMER COATED
OPTICAL TRAPS
MEASUREMENT
MOBILITY
BROWNIAN
TCS

All Related Versions

Version 1, 2000-12-14, ArXiv
Published version: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 359 (1782), 883.

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