Correlated Diffusion of Colloidal Particles near a Liquid-Liquid Interface

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	Correlated Diffusion of Colloidal Particles near a Liquid-Liquid Interface
	Zhang, W ; Chen, S ; Li, N ; Zhang, JZ ; Chen, W
刊名	PLOS ONE
	2014
卷号	9 期号:1 页码:e85173
关键词	TIME SELF-DIFFUSION QUASI-2-DIMENSIONAL SUSPENSIONS HYDRODYNAMIC INTERACTION WATER-INTERFACE BROWNIAN-MOTION SPHERES MICRORHEOLOGY MEMBRANE SURFACE
ISSN号	1932-6203
通讯作者	Zhang, W (reprint author), Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China.
英文摘要	Optical microscopy and multi-particle tracking are used to investigate the cross-correlated diffusion of quasi two-dimensional colloidal particles near an oil-water interface. The behaviors of the correlated diffusion along longitudinal and transverse direction are asymmetric. It is shown that the characteristic length for longitudinal and transverse correlated diffusion are particle diameter d and the distance z from particle center to the interface, respectively, for large particle separation r. The longitudinal and transverse correlated diffusion coefficient D-parallel to(r) and D-perpendicular to(r) are independent of the colloidal area fraction n when n<0.3, which indicates that the hydrodynamic interactions(HIs) among the particles are dominated by HIs through the surrounding fluid for small n. For high area fraction n>0.4, the power law exponent for the spatial decay of D-perpendicular to(r) begins to decrease, which suggests the HIs are more contributed from the 2D particle monolayer self for large n.
学科主题	Physics
收录类别	SCI
资助信息	National Science Fund for Talent Trainning in Basic Science [J1103204]
原文出处	http://dx.doi.org/10.1371/journal.pone.0085173
语种	英语
WOS记录号	WOS:000330240500036
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15507]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zhang, W,Chen, S,Li, N,et al. Correlated Diffusion of Colloidal Particles near a Liquid-Liquid Interface[J]. PLOS ONE,2014,9(1):e85173.
APA	Zhang, W,Chen, S,Li, N,Zhang, JZ,&Chen, W.(2014).Correlated Diffusion of Colloidal Particles near a Liquid-Liquid Interface.PLOS ONE,9(1),e85173.
MLA	Zhang, W,et al."Correlated Diffusion of Colloidal Particles near a Liquid-Liquid Interface".PLOS ONE 9.1(2014):e85173.