Volume 51, Issue 7 pp. 1534-1546
Review

Learning from “Coffee Rings”: Ordered Structures Enabled by Controlled Evaporative Self-Assembly

Wei Han

Wei Han

School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, NW, Atlanta, GA 30332-0245 (USA)

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Prof. Zhiqun Lin

Corresponding Author

Prof. Zhiqun Lin

School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, NW, Atlanta, GA 30332-0245 (USA)

School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, NW, Atlanta, GA 30332-0245 (USA)Search for more papers by this author
First published: 23 December 2011
Citations: 427

Graphical Abstract

Drying out: The evaporation of solutions of nonvolatile solutes is one way to generate complex ordered structures. An array of facile and robust preparative strategies based on controlled evaporative self-assembly (CESA) of confined solutions have been exploited to rationally assemble various soft and hard materials into spatially ordered structures (see picture) with engineered properties and functionality over large surface areas.

Abstract

Research into the evaporation of solutions is not only aimed at a better understanding the physics of evaporation, but increasingly at capitalizing on the extremely simple method it offers to assemble diverse nonvolatile solutes into complex ordered structures on the submicron and longer length scales. This Review highlights recent advances in evaporative assembly of confined solutions, focusing especially on recently developed approaches that provide structures with unprecedented regularity composed of polymers, nanoparticles, and biomaterials, by controlled evaporation-driven, flow-aided self-assembly. A broad range of variables that can control the deposition are explored and the future directions of this rich field are presented.

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