Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels

doi:10.1088/1674-1056/28/7/074701

	Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels
	Li HH(李瀚海); Zheng ZY(郑中玉); Xie T(谢天); Wang YR(王育人)
刊名	CHINESE PHYSICS B
	2019-07-01
卷号	28 期号:7 页码:6
关键词	hydrodynamic interaction self-diffusion ellipsoids channel
ISSN号	1674-1056
DOI	10.1088/1674-1056/28/7/074701
通讯作者	Zheng, Zhong-Yu(zzy@imech.ac.cn) ; Wang, Yu-Ren(yurenwang@imech.ac.cn)
英文摘要	The self-diffusion problem of Brownian particles under the constraint of quasi-one-dimensional (q1D) channel has raised wide concern. The hydrodynamic interaction (HI) plays an important role in many practical problems and two-body interactions remain dominant under q1D constraint. We measure the diffusion coefficient of individual ellipsoid when two ellipsoidal particles are close to each other by video-microscopy measurement. Meanwhile, we obtain the numerical simulation results of diffusion coefficient using finite element software. We find that the self-diffusion coefficient of the ellipsoid decreases exponentially with the decrease of their mutual distance X when X < X-0, where X-0 is the maximum distance of the ellipsoids to maintain their mutual influence, X-0 and the variation rate are related to the aspect ratio p = a/b. The mean squared displacement (MSD) of the ellipsoids indicates that the self-diffusion appears as a crossover region, in which the diffusion coefficient increases as the time increases in the intermediate time regime, which is proven to be caused by the spatial variations affected by the hydrodynamic interactions. These findings indicate that hydrodynamic interaction can significantly affect the self-diffusion behavior of adjacent particles and has important implications to the research of microfluidic problems in blood vessels and bones, drug delivery, and lab-on-chip.
分类号	Q3
资助项目	National Natural Science Foundation of China[U1738118] ; National Natural Science Foundation of China[11372314] ; Strategic Priority Research Program on Space Science ; Chinese Academy of Sciences[XDA04020202] ; Chinese Academy of Sciences[XDA04020406] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040301]
WOS关键词	ANOMALOUS DIFFUSION ; SEMIDILUTE ; NANOPARTICLES ; MOBILITY ; MOTION
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000476831100001
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Zheng, Zhong-Yu ; Wang, Yu-Ren
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79482]
专题	力学研究所_国家微重力实验室
推荐引用方式 GB/T 7714	Li HH,Zheng ZY,Xie T,et al. Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels[J]. CHINESE PHYSICS B,2019,28(7):6.
APA	李瀚海,郑中玉,谢天,&王育人.(2019).Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels.CHINESE PHYSICS B,28(7),6.
MLA	李瀚海,et al."Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels".CHINESE PHYSICS B 28.7(2019):6.