凹陷状胶体粒子的自组装

南京大学学报(自然科学版) ›› 2014, Vol. 50 ›› Issue (1): 23–.

凹陷状胶体粒子的自组装

程志峰1*,罗富华2

出版日期:2014-01-20 发布日期:2014-01-20
作者简介:(1.固体微结构国家实验室,南京大学物理学院,南京,210093; 2.苏州大学软凝聚态物理及交叉研究中心,苏州,215006)
基金资助:
国家自然科学基金（91027040），苏州大学引进人才启动基金（Q410800510）

The self-assembly of the concave particles

Cheng Zhifeng1, Luo Fuhua2

Online:2014-01-20 Published:2014-01-20
About author:(1.National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China; 2. Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou,215006, China)

摘要/Abstract

摘要： 凹陷状胶体粒子的自组装具有独特的方向性和形状识别性，是最近几年自组装研究的热点问题之一。由于缺乏合适的实验模型系统，至今为止,大部分研究都是以计算机模拟为主。为了从实验上研究凹陷状胶体粒子的自组装现象，本文首次采用分散聚合的方法，设计并成功合成了两种单分散性的、具有不同数目凹陷的胶体粒子：单凹陷粒子和多凹陷粒子。通过扫描电镜和光学显微镜对合成的凹陷粒子的形貌、大小进行分析，结果表明所得到的凹陷粒子为大小均一的微米级胶体粒子，表面光滑，在水溶液中能稳定分散，适合利用光学显微镜直观研究胶体凹陷粒子自组装。本文考察了单凹陷胶体粒子的方向性聚集组装和多凹陷粒子的特定识别性自组装现象。我们研究发现，在交变电场中，单凹陷粒子倾向于侧向移动，容易定向自组装成线性结构，使得该粒子在模拟碗状粒子凝聚态物理结构方面具有潜在的应用。另外，本文以多凹陷胶体粒子为“锁”，聚苯乙烯圆球为“钥匙”，研究了多凹陷粒子与圆球粒子的“锁-钥”自组装现象，展现了圆球粒子与凹陷粒子之间丰富的“锁-钥”自组装可能性，并初步探讨了其形成机制。

Abstract: Recently, there is a growing interest in studying the concave colloidal particles due to their unique directional and shape-recognition assemblies. In order to study this special assembly phenomenon, we creatively used the dispersion polymerization to design and fabricate concave colloidal particles with different number of dimples: the single-dimple colloids and the multi-dimple colloids. With uniform size and smooth surface, these two types of dimpled colloids are ideal model to study the self-assembly of concave particles. In addition we investigated the directed self-assembly ofthe single-dimple colloids and the specific bonding of the multi-dimple colloids. In an alternating electric field,the single-dimple colloids tend to move with a side-direction way. This special movement would induce directional self-assemblies between the aggregated particles. Using the multi-dimple colloids as the "lock" particles, and the polystyrene spheres as the "key" particles, the lock-and-key self-assembly by depletion attraction is explored in this article. The results demonstrate a variety of bonding possibilities existing among the multi-dimple particles and spherical particles. Besides, we also discussed formation mechanism of the lock-and-key

程志峰1*,罗富华2. 凹陷状胶体粒子的自组装[J]. 南京大学学报(自然科学版), 2014, 50(1): 23–.

Cheng Zhifeng1, Luo Fuhua2. The self-assembly of the concave particles[J]. Journal of Nanjing University(Natural Sciences), 2014, 50(1): 23–.

参考文献

[1] Hosein I D,Liddell C M. Convectively assembled nonspherical mushroom cap-based colloidal crystals. Langmuir, 2007, 23(17): 8810~8814.
[2] Sacanna S, Irvine W T M, Chaikin P M P, et al. Lock and key colloids. Nature, 2010, 464: 575~578.
[3] Kim S H, Hollingsworth A D, Sacanna S, et al. Synthesis and assembly of colloidal particles with sticky dimples. Journal of American Chemical Society, 2012, 134(39): 16115~16118.
[4] Marechal M, Kortschot R J, ,et al. Phase behavior and structure of a new colloidal model system of bowl-shaped particles. Nano Letters, 2010, 10(5): 1907~1911.
[5] Hyukim S, Jeong U, Xia Y N. Polymer hollow particles with controllable holes in their surfaces. Nature Materials, 2005, 4: 671~675.
[6] Zoldesi C I, Imhof A. Synthesis of monodisperse colloidal spheres, capsules, and microballoons by emulsion templating. Advanced Materials, 2005, 17(7): 924~928.
[7] Kim S H, Abbaspourrad A, Weitz D. Amphiphilic crescent-moon-shaped microparticles formed by selective adsorption of colloids. Journal of American Chemical Society, 2011, 133(14): 5516~5524.
[8] 顾军, 王昭群.交联聚苯乙烯粒子的中空结构及其分析，南京大学学报(自然科学)，2007, 43(5): 489~493.
[9] Xu L, Li H, Jiang X, Wang J X, et al. Synthesis of amphiphilic mushroom cap-shaped colloidal particles towards fabrication of anisotropic colloidal crystals. Macromolecular Rapid Communications, 2010, 31(16):1422~1426.
[10] Huang Y, Wang J X, Zhou J M, et al. Controllable synthesis of latex particles with multicavity structures. Macromolecules, 2011, 44(8): 2404~2409.
[11] Li Z F, Wei X L, Ngai T. One-pot synthesis of monodisperse latex particles with single-cavity structure. RSC Advances, 2012, 2: 1322~1325.
[12] Zhang T H, Liu X Y. Nulceation: what happens at the initial stage? Angewandte Chemie International Edition, 2009, 48:1308-1312.
[13] Ma F D, Wang S J, Smith L, et al. Two-dimensional assembly of symmetric colloidal dimers under electric fields. Advanced Functional Materials, 2012, 22(20): 4334~4343.
[14] 李洋，孙晓燕. 单层颗粒模型体系融化过程的动力学和动力学异质性, 南京大学学报(自然科学)，2013.
[15] Forster J D, Park J G, Mittal M, et al. Assembly of optical-scale dumbbells into dense photonic crystals. ACS Nano, 2011, 5(8): 6695~6700.
[16] Asakura S, Oosawa F. Interaction between particles suspended in solutions of macromolecules. Journal of Polymer Science, 1958, 33(126): 183-192.
[17] Wang Y F, Wang Y, Breed D R, et al. Colloids with valence and specific directional bonding. Nature, 2012, 491:51~56.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed