String formation and demixing in monolayers of dipolar colloidal mixtures
文献类型：期刊论文
| 作者 | Chen, XS
|
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 135期号:13页码:134701 |
| 关键词 | HYPERNETTED-CHAIN APPROXIMATION NEUTRAL HARD-SPHERES INTEGRAL-EQUATIONS NONSPHERICAL PARTICLES FLUIDS INSTABILITY SIMULATION DENSITY SYSTEMS FIELDS |
| ISSN号 | 0021-9606 |
| 通讯作者 | Chen, XS (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. |
| 英文摘要 | Employing 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] |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1063/1.3643324 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295625400058 |
| 公开日期 | 2013-05-17 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14258]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Chen, XS. String formation and demixing in monolayers of dipolar colloidal mixtures[J]. JOURNAL OF CHEMICAL PHYSICS,2011,135(13):134701. |
| APA | Chen, XS.(2011).String formation and demixing in monolayers of dipolar colloidal mixtures.JOURNAL OF CHEMICAL PHYSICS,135(13),134701. |
| MLA | Chen, XS."String formation and demixing in monolayers of dipolar colloidal mixtures".JOURNAL OF CHEMICAL PHYSICS 135.13(2011):134701. |
入库方式： OAI收割
来源：理论物理研究所
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