Brownian Motion of Boomerang Colloidal Particles

被引：60

作者：

Chakrabarty, Ayan ^{[1
]}

Konya, Andrew ^{[1
]}

Wang, Feng ^{[1
]}

Selinger, Jonathan V. ^{[1
]}

Sun, Kai ^{[2
]}

Wei, Qi-Huo ^{[1
]}

机构：

[1] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 16期

基金：

美国国家科学基金会;

关键词：

RIGID MACROMOLECULES; HYDRODYNAMIC PROPERTIES; DIFFUSION-COEFFICIENTS; IRREGULAR SHAPES; ARBITRARY SHAPE; COMPLEX FLUIDS; MICRORHEOLOGY; DYNAMICS; SEPARATION; PHYSICS;

D O I：

10.1103/PhysRevLett.111.160603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the Brownian motion of boomerang colloidal particles confined between two glass plates. Our experimental observations show that the mean displacements are biased towards the center of hydrodynamic stress (CoH), and that the mean-square displacements exhibit a crossover from short-time faster to long-time slower diffusion with the short-time diffusion coefficients dependent on the points used for tracking. A model based on Langevin theory elucidates that these behaviors are ascribed to the superposition of two diffusive modes: the ellipsoidal motion of the CoH and the rotational motion of the tracking point with respect to the CoH.

引用

页数：5

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