Measurement of the hydrodynamic forces between two polymer-coated spheres

被引：39
|
作者：
Bartlett, P [1 ]
Henderson, SI [1 ]
Mitchell, SJ [1 ]
机构：
[1] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
来源：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2001年 / 359卷 / 1782期
关键词：
optical tweezers; colloids; hydrodynamics; Brownian motion;
D O I：
10.1098/rsta.2000.0805
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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. A pair of 1.3 mum diameter polymer-coated poly(methylmethacrylate) particles were held at; separations of between 2 and 20 mum 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 tenser is in quantitative agreement with low-Reynolds-number calculations.
引用
收藏
页码：883 / 893
页数：11
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