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

doi:10.1080/00268976.2020.1718226

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	Simulation of diffusio-phoretic motion of colloidal particle suppressed by bound solutes within adsorption shell
	Wei JC(韦佳辰)1,2
通讯作者	Wei, Jiachen(weijiachen@lnm.imech.ac.cn)
发表期刊	MOLECULAR PHYSICS
	2020-01-28
页码	7
ISSN	0026-8976
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.
关键词	Diffusio-phoresis molecular dynamics colloid phoretic transport
DOI	10.1080/00268976.2020.1718226
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000509604900001
关键词[WOS]	GRADIENTS ; THERMOPHORESIS ; MIGRATION ; RANGE ; SALT
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
资助项目	National Natural Science Foundations of China[2016YFA0501601] ; National Key Research andDevelopment Program of China[11602279]
项目资助者	National Natural Science Foundations of China ; National Key Research andDevelopment Program of China
论文分区	Q3
力学所作者排名	1
RpAuthor	Wei, Jiachen
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81303
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
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.

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