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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