Relationship between characteristic lengths and effective Saffman length in colloidal monolayers near a water-oil interface

doi:10.1088/1674-1056/28/6/064703

Abstract

The hydrodynamic interactions (HIs) in colloidal monolayers are strongly influenced by the boundary conditions and can be directly described in terms of the cross-correlated diffusion of the colloid particles. In this work, we experimentally measured the cross-correlated diffusion in colloidal monolayers near a water-oil interface. The characteristic lengths of the system were obtained by introducing an effective Saffman length. The characteristic lengths of a particle monolayer near a water-oil interface were found to be anisotropic in the longitudinal and transverse directions. From these characteristic lengths, the master curves of cross-correlated diffusion are obtained, which universally describe the HIs near a liquid-liquid interface.

Keywords: colloidal monolayer cross-correlated diffusion hydrodynamic interactions characteristic length

Received: 29 March 2019
Revised: 05 May 2019
Accepted manuscript online:

PACS:	47.57.J-	(Colloidal systems)
	47.85.Dh	(Hydrodynamics, hydraulics, hydrostatics)
	05.40.Jc	(Brownian motion)
	45.50.-j	(Dynamics and kinematics of a particle and a system of particles)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474054, 11774417, and 11604381) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20160238).

Corresponding Authors: Wei Chen
E-mail: phchenwei@fudan.edu.cn

Cite this article:

Na Li(李娜), Wei Zhang(张伟), Wei Chen(陈唯) Relationship between characteristic lengths and effective Saffman length in colloidal monolayers near a water-oil interface 2019 Chin. Phys. B 28 064703

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[1]	Colloidal monolayer self-assembly and its simulation via cellular automaton model Wu Yi-Zhi (吴以治), Chen Chen (陈晨), Xu Xiao-Liang (许小亮), Liu Yun-Xi (刘赟夕), Shao Wei-Jia (邵伟佳), Yin Nai-Qiang (尹乃强), Zhang Wen-Ting (张文婷), Ke Jia-Xin (柯佳鑫), Fang Xiao-Tian (方啸天). Chin. Phys. B, 2014, 23(8): 088703.

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Relationship between characteristic lengths and effective Saffman length in colloidal monolayers near a water-oil interface

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