A classical density functional approach to depletion interaction of Lennard-Jones binary mixtures

doi:10.1088/1572-9494/ac4511

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	A classical density functional approach to depletion interaction of Lennard-Jones binary mixtures
	Chen, Yue 4; Chen, Wei 3; Chen, Xiaosong 1
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2022
卷号	74 期号:3 页码:35602
关键词	EQUATION-OF-STATE MEAN SPHERICAL APPROXIMATION FREE-ENERGY MODEL PERTURBATION-THEORY FLUID MIXTURE FORCES NONUNIFORM SEPARATION SOLUTE
ISSN号	0253-6102
DOI	10.1088/1572-9494/ac4511
英文摘要	In this article, we apply classical density functional theory to investigate the characteristics of depletion interaction in Lennard-Jones (LJ) binary fluid mixtures. First, to confirm the validity of our adopted density functional formalism, we calculate the radial distribution functions using a theoretical approach and compare them with results obtained by molecular dynamics simulation. Then, this approach is applied to two colloids immersed in LJ solvent systems. We investigate the variation of depletion interaction with respect to the distance of two colloids in LJ binary systems. We find that depletion interaction may be attractive or repulsive, mostly depending on the bulk density of the solvent and the temperature of the binary system. For high bulk densities, the repulsive barrier of depletion force is remarkable when the total excluded volume of colloids touches each other and reaches a maximum. The height of the repulsive barrier is related to the parameters of the LJ potential and bulk density. Moreover, the depletion force may exhibit attractive wells if the bulk density of the solvent is low. The attractive well tends to appear when the surface-surface distance of colloids is half of the size of the polymer and deepens with temperature lowering in a fixed bulk density. In contrast with the hard-sphere system, no oscillation of depletion potential around zero is observed.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27682]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Beijing Normal Univ, Sch Syst Sci, Beijing 100875, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yue,Chen, Wei,Chen, Xiaosong. A classical density functional approach to depletion interaction of Lennard-Jones binary mixtures[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2022,74(3):35602.
APA	Chen, Yue,Chen, Wei,&Chen, Xiaosong.(2022).A classical density functional approach to depletion interaction of Lennard-Jones binary mixtures.COMMUNICATIONS IN THEORETICAL PHYSICS,74(3),35602.
MLA	Chen, Yue,et al."A classical density functional approach to depletion interaction of Lennard-Jones binary mixtures".COMMUNICATIONS IN THEORETICAL PHYSICS 74.3(2022):35602.