Dynamics of polydisperse hard-spheres under strong confinement
Dynamics of polydisperse hard-spheres under strong confinement
复制标题
强约束下多分散硬球的动力学
DOI:
10.1080/00268976.2020.1728407
复制
发表时间:
2020
影响因子:
1.7
通讯作者:
Conrad, Jacinta C.
中科院分区:
文献类型:
--
作者:
Roberts, Ryan C.;Marioni, Nico;Palmer, Jeremy C.;Conrad, Jacinta C.
We use molecular simulation to probe the connection between local structure and the unusual re-entrant dynamics observed for polydisperse hard-sphere liquids confined in thin slit pores. The local structure is characterised by calculating 2-D bond-orientational order parameters associated with square and hexatic order for particles in the layer adjacent to the confining walls. When the wall separation is commensurate with the average particle size, the particles primarily exhibit local hexatic order, whereas local square order increases in prevalence for incommensurate geometries. The relaxation time extracted from the ensemble-averaged mean-square displacement increases exponentially with the static correlation length associated with hexatic local order in strongly confined commensurate geometries, in agreement with theoretical predictions for dynamical slowing. Square order, by contrast, is not associated with a growing length scale for either commensurate or incommensurate geometries, indicating that it is strongly geometrically frustrated. Our results suggest that the influence of bond-orientational order on dynamical slowing may be altered by changing the extent of confinement.
登录
查看更多内容
DOI:
10.1073/pnas.1501911112
发表时间:
2015-06-02
影响因子:
11.1
作者:
Russo, John;Tanaka, Hajime
通讯作者:
Tanaka, Hajime
影响因子:
16.6
作者:
Leocmach, Mathieu;Tanaka, Hajime
通讯作者:
Tanaka, Hajime
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
Massimo Campanino;Dmitry Ioffe;Yvan Velenik
通讯作者:
Yvan Velenik
影响因子:
8.6
作者:
Neser, S;Bechinger, C;Palberg, T
通讯作者:
Palberg, T
影响因子:
3.4
作者:
S. Mandal;S. Lang;V. Boţan;T. Franosch
通讯作者:
T. Franosch