ITP OpenIR  > 理论物理所科研产出  > SCI论文
Luo, L; Klapp, SHL; Chen, XS; Chen, XS (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
String formation and demixing in monolayers of dipolar colloidal mixtures
Source PublicationJOURNAL OF CHEMICAL PHYSICS
Language英语
KeywordHypernetted-chain Approximation Neutral Hard-spheres Integral-equations Nonspherical Particles Fluids Instability Simulation Density Systems Fields
AbstractEmploying hypernetted chain (HNC) integral equations and a stability analysis we investigate the structure and phase behavior of bidisperse mixtures of dipolar hard spheres with different size ratios s = sigma(S)/sigma(L) confined to a plane. The dipole moments of the particles are perfectly ordered along an in-plane direction, yielding anisotropic interactions favoring chain formation. Exploring a range of size ratios and compositions, our study predicts a complex interplay between aggregation phenomena, on the one hand, and volume phase transitions, on the other hand. In dilute, strongly asymmetric systems (s = 0.5), our HNC analysis indicates chain formation of the large particles, while the small particles act as a weakly correlated background. According to our fluctuation analysis, this aggregation behavior results in combined condensation-demixing transitions, with a trend towards pure demixing when the concentration of the large particles, c(L), becomes small. In dense systems, the most interesting results are found for intermediate size ratios, s similar to 0.7-0.8. Here we find signatures of a concentration-driven transition from pure chains of large particles (large c(L)) to mixed chains with alternating order of large and small particles (small c(L)). The two regimes are separated by a characteristic "jump" in the HNC non-solution line. (C) 2011 American Institute of Physics. [doi:10.1063/1.3643324]
2011
ISSN0021-9606
Volume135Issue:13Pages:134701
Subject AreaPhysics
Indexed BySCI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14258
Collection理论物理所科研产出_SCI论文
Corresponding AuthorChen, XS (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Luo, L,Klapp, SHL,Chen, XS,et al. String formation and demixing in monolayers of dipolar colloidal mixtures[J]. JOURNAL OF CHEMICAL PHYSICS,2011,135(13):134701.
APA Luo, L,Klapp, SHL,Chen, XS,&Chen, XS .(2011).String formation and demixing in monolayers of dipolar colloidal mixtures.JOURNAL OF CHEMICAL PHYSICS,135(13),134701.
MLA Luo, L,et al."String formation and demixing in monolayers of dipolar colloidal mixtures".JOURNAL OF CHEMICAL PHYSICS 135.13(2011):134701.
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