图案化表面上的熵驱动胶体结晶

Entropically driven colloidal crystallization on patterned surfaces.

作者信息

Lin Kh, Crocker JC, Prasad V, Schofield A, Weitz DA, Lubensky TC, Yodh AG

机构信息

Department of Physics and Astronomy, University of Pennsylvania, 209 S. 33rd Street, Philadelphia, Pennsylvania 19104-6396, USA.

出版信息

Phys Rev Lett. 2000 Aug 21;85(8):1770-3. doi: 10.1103/PhysRevLett.85.1770.

DOI:10.1103/PhysRevLett.85.1770

PMID:10970610

Abstract

We investigate the self-assembly of colloidal spheres on periodically patterned templates. The surface potentials and the surface phases are induced entropically by the presence of dissolved, nonadsorbing polymers. A rich variety of two-dimensional fluidlike and solidlike phases was observed to form on template potentials with both one- and two-dimensional symmetry. The same methodology was then used to nucleate an oriented single fcc crystal more than 30 layers thick. The general approach provides a new route for directed self-assembly of novel mesoscopic structures.

摘要

我们研究了胶体球在周期性图案化模板上的自组装。表面电势和表面相是由溶解的非吸附性聚合物的存在通过熵效应诱导产生的。在具有一维和二维对称性的模板电势上，观察到形成了丰富多样的二维类流体和类固体相。然后采用相同的方法成核出一个厚度超过30层的取向单fcc晶体。该通用方法为新型介观结构的定向自组装提供了一条新途径。