Assembly of body-centered cubic crystals in hard spheres

doi:10.1140/epje/i2011-11047-2

CORC > 化学研究所 > 中国科学院化学研究所

	Assembly of body-centered cubic crystals in hard spheres
	Xu, W. -S.; Sun, Z. -Y.; An, L. -J.
刊名	EUROPEAN PHYSICAL JOURNAL E
	2011-05-01
卷号	34 期号:5
ISSN号	1292-8941
DOI	10.1140/epje/i2011-11047-2
英文摘要	We investigate the crystallization of monodisperse hard spheres confined by two square patterned substrates (possessing the basic character of the body-centered cubic (bcc) crystal structure) at varying substrate separations via molecular dynamics simulation. Through slowly increasing the density of the system, we find that crystallization under the influence of square patterned substrates can set in at lower densities compared with the homogeneous crystallization. As the substrate separation decreases, the density, where crystallization occurs (i.e., pressure drops), becomes small. Moreover, two distinct regimes are identified in the plane of bcc particle fraction and density for the separation range investigated. For large substrate separations, the bcc particle fraction displays a local maximum as the density is increased, and the resulting formed crystals have a polycrystalline structure. However, and more importantly, another situation emerges for small substrate separations: the capillary effects (stemming from the presence of two substrates) overwhelm the bulk driving forces (stemming from the spontaneous thermal fluctuations in the bulk) during the densification, eventually resulting in the formation of a defect-free bcc crystal (unstable with respect to the bulk hard-sphere crystals) by using two square patterned substrates.
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000291296600002
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/73121]
专题	中国科学院化学研究所
通讯作者	Xu, W. -S.
作者单位	Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Xu, W. -S.,Sun, Z. -Y.,An, L. -J.. Assembly of body-centered cubic crystals in hard spheres[J]. EUROPEAN PHYSICAL JOURNAL E,2011,34(5).
APA	Xu, W. -S.,Sun, Z. -Y.,&An, L. -J..(2011).Assembly of body-centered cubic crystals in hard spheres.EUROPEAN PHYSICAL JOURNAL E,34(5).
MLA	Xu, W. -S.,et al."Assembly of body-centered cubic crystals in hard spheres".EUROPEAN PHYSICAL JOURNAL E 34.5(2011).