高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (1): 44-48.doi: 10.7503/cjcu20190602

• 研究快报 • 上一篇    下一篇

熵驱大分子胶体粒子的柱状受限结晶

侯翠岭,朱国龙,戴晓彬,徐子阳,陈鹏宇,张轩钰,高丽娟,燕立唐()   

  1. 清华大学化学工程系, 先进材料教育部重点实验室, 北京 100084
  • 收稿日期:2019-11-19 出版日期:2020-01-10 发布日期:2019-12-18
  • 通讯作者: 燕立唐 E-mail:ltyan@mail.tsinghua.edu.cn
  • 基金资助:
    国家自然科学基金批准号:(21873053);江西省自然科学基金资助批准号:(20161BAB206104)

Entropy-driven Crystallization of Colloid Particles Within Cylindrical Confinement

HOU Cuiling,ZHU Guolong,DAI Xiaobin,XU Ziyang,CHEN Pengyu,ZHANG Xuanyu,GAO Lijuan,YAN Litang()   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering,Tsinghua University, Beijing 100084, China
  • Received:2019-11-19 Online:2020-01-10 Published:2019-12-18
  • Contact: Litang YAN E-mail:ltyan@mail.tsinghua.edu.cn
  • Supported by:
    ? Supported by National Natural Science Foundation of China No(21873053);and the Natural Science Foundation of Jiangxi Province, China No(20161BAB206104)

关键词: 熵驱有序, 胶体晶体, 柱状受限, 有序转变, 计算模拟

Abstract:

The dynamic process of entropy-driven colloidal particle crystallization within cylindrical con?nement was investigated by Brownian dynamics simulations. In these densely-packed systems, the influence of volume fraction and number of particles on the crystal morphology and structure by cylindrical con?nement, as well as the crystallization process and growth mechanism of colloidal particles were studied, and the evolution of cylindrical crystal structure was simulated. It is found that at low volume fraction, the particle packing structure is gradually layered from concentric circles with the increase of the number of colloidal particles and cylindrical diameter, which is cue to the competition between boundary effect and lattice defect. Particularly, the entropy plays a dominant role in this process. Our findings provide insights into the control of crystal morphology of colloidal particles, deepen the understanding of entropy-driven ordered behavior in colloidal systems, and present a new approach for the structural construction and dynamics regulation for self-assembly of various colloidal systems.

Key words: Entropic ordering, Colloid crystal, Order transition, Cylindrical con?nement;, Computational modeling

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