Structural signatures of dynamic heterogeneities in monolayers of colloidal ellipsoids | |
Zheng ZY(郑中玉); Ni R(倪然); Wang F(王峰); Dijkstra M; Wang YR(王育人); Han YL(韩一龙); Zheng ZY(郑中玉); Han YL(韩一龙) | |
发表期刊 | NATURE COMMUNICATIONS |
2014-05-08 | |
卷号 | 5页码:3829 |
ISSN | 2041-1723 |
摘要 | When a liquid is supercooled towards the glass transition, its dynamics drastically slows down, whereas its static structure remains relatively unchanged. Finding a structural signature of the dynamic slowing down is a major challenge, yet it is often too subtle to be uncovered. Here we discover the structural signatures for both translational and rotational dynamics in monolayers of colloidal ellipsoids by video microscopy experiments and computer simulations. The correlation lengths of the dynamic slowest-moving clusters, the static glassy clusters, the static local structural entropy and the dynamic heterogeneity follow the same power-law divergence, suggesting that the kinetic slowing down is caused by a decrease in the structural entropy and an increase in the size of the glassy cluster. Ellipsoids with different aspect ratios exhibit single- or double-step glass transitions with distinct dynamic heterogeneities. These findings demonstrate that the particle shape anisotropy has important effects on the structure and dynamics of the glass. |
关键词 | Colloids Glass Transition Structure Dynamic Heterogeneity Ellipsoids Anisotropy Entropy |
学科领域 | 交叉与边缘领域的力学 ; 物理力学 |
DOI | 10.1038/ncomms4829 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000337373200004 |
关键词[WOS] | Glass-forming Liquids ; Supercooled Liquids ; Orientational Order ; Jamming Transition ; Hard Ellipsoids ; Crystallization ; Frustration ; Relaxation ; Simulation ; Insights |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
项目资助者 | NSFC grants 11104286, 11372314, 51071166 andNBRP grant 2011CB710901 |
课题组名称 | NML空间材料物理力学 |
论文分区 | 一类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/48903 |
专题 | 微重力重点实验室 |
通讯作者 | Zheng ZY(郑中玉); Han YL(韩一龙) |
推荐引用方式 GB/T 7714 | Zheng ZY,Ni R,Wang F,et al. Structural signatures of dynamic heterogeneities in monolayers of colloidal ellipsoids[J]. NATURE COMMUNICATIONS,2014,5:3829. |
APA | Zheng ZY.,Ni R.,Wang F.,Dijkstra M.,Wang YR.,...&Han YL.(2014).Structural signatures of dynamic heterogeneities in monolayers of colloidal ellipsoids.NATURE COMMUNICATIONS,5,3829. |
MLA | Zheng ZY,et al."Structural signatures of dynamic heterogeneities in monolayers of colloidal ellipsoids".NATURE COMMUNICATIONS 5(2014):3829. |
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