Self-assembly: Hierarchically Ordered Structures Enabled by Controlled Evaporative Self-Assembly (Small 20/2010)

Authors

  • Myunghwan Byun,

    1. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
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  • Wei Han,

    1. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
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  • Feng Qiu,

    1. Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
    2. Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
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  • Ned B. Bowden,

    1. Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA
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  • Zhiqun Lin

    Corresponding author
    1. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
    2. Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
    • Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA.
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Abstract

original image

The cover picture shows hierarchically ordered structures, which are achieved by combining two self-assembly processes at different length scales, namely, top-down controlled evaporative self-assembly and bottom-up spontaneous self-assembly of nanomaterials, i.e., comb block copolymers (CBCPs). Highly ordered, microscopic concentric CBCP rectangles are formed in a gradient arrangement via evaporative selfassembly as a result of controlled pinning and depinning of a three-phase contact line of evaporating CBCP toluene solution confined in a wedge-on-fl at geometry. Subsequent solvent vapor annealing promotes spontaneous microphase separation of the CBCP, thereby leading to the formation of vertically aligned nanocylinders. For more information, please read the Communication “Hierarchically Ordered Structures Enabled by Controlled Evaporative Self-Assembly” by Z. Lin and co-workers, beginning on page 2250.

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