Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell

doi:10.1080/00268976.2020.1718226

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell
	Wei JC(韦佳辰)1,2
刊名	MOLECULAR PHYSICS
	2020-01-28
页码	7
关键词	Diffusio-phoresis molecular dynamics colloid phoretic transport
ISSN号	0026-8976
DOI	10.1080/00268976.2020.1718226
通讯作者	Wei, Jiachen(weijiachen@lnm.imech.ac.cn)
英文摘要	Colloidal particle submerged in a non-equilibrium fluid with a concentration gradient of solutes experiences diffusio-phoresis. Such directional transport originates from the driving forces that exert on the fluid in a microscopic boundary layer surrounding the colloid. Based on a simple model of spherical colloid fixed in a concentration gradient of solutes, molecular dynamics simulations are performed to determine the interaction parameters that maximise the diffusio-phoretic mobility, which cannot be properly measured by conventional continuum theory. The diffusio-phoretic mobility is found to depend non-monotonically on the strength of the interaction between the colloid and solutes, due to the presence of bound solutes within adsorption shell that cannot contribute to diffusio-phoresis. The results also show that the phoretic mobility depends sensitively on the density of solutes in bulk, due to the uneven distribution of excess particles surrounding the colloid at a microscopic level. The simulations suggest that diffusio-phoresis may in principle be applied to the selective transport, separation and purification for colloidal systems. By substituting the spherical colloid with other realistic macromolecules, the model could provide results that are quantitatively comparable with experiments.
分类号	Q3
资助项目	National Natural Science Foundations of China[2016YFA0501601] ; National Key Research andDevelopment Program of China[11602279]
WOS关键词	GRADIENTS ; THERMOPHORESIS ; MIGRATION ; RANGE ; SALT
WOS研究方向	Chemistry ; Physics
语种	英语
WOS记录号	WOS:000509604900001
资助机构	National Natural Science Foundations of China ; National Key Research andDevelopment Program of China
其他责任者	Wei, Jiachen
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81302]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Wei JC. Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell[J]. MOLECULAR PHYSICS,2020:7.
APA	韦佳辰.(2020).Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell.MOLECULAR PHYSICS,7.
MLA	韦佳辰."Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell".MOLECULAR PHYSICS (2020):7.