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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
Corresponding AuthorWei, Jiachen(weijiachen@lnm.imech.ac.cn)
Source PublicationMOLECULAR PHYSICS
2020-01-28
Pages7
ISSN0026-8976
AbstractColloidal 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.
KeywordDiffusio-phoresis molecular dynamics colloid phoretic transport
DOI10.1080/00268976.2020.1718226
Indexed BySCI ; EI
Language英语
WOS IDWOS:000509604900001
WOS KeywordGRADIENTS ; THERMOPHORESIS ; MIGRATION ; RANGE ; SALT
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
Funding ProjectNational Natural Science Foundations of China[2016YFA0501601] ; National Key Research andDevelopment Program of China[11602279]
Funding OrganizationNational Natural Science Foundations of China ; National Key Research andDevelopment Program of China
ClassificationQ3
Ranking1
ContributorWei, Jiachen
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81303
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
2.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
Recommended Citation
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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