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Issue 39, 2016
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Morphology control of three-dimensional nanostructures in porous templates using lamella-forming block copolymers and solvent vapors

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Abstract

The microphase separation behavior of block copolymers confined in cylindrical nanopores has been extensively investigated. Recently, the solvent-annealing-induced nanowetting in templates (SAINT) method has been demonstrated to be a versatile approach for the infiltration of block copolymers into the nanopores of porous templates. The function of the annealing solvents, however, is still not well understood, especially in the morphology control of the fabricated block copolymer nanostructures. In this work, we elucidate the function of the annealing solvents in the SAINT method using a lamella-forming block copolymer, polystyrene-block-polydimethylsiloxane (PS-b-PDMS), and anodic aluminum oxide (AAO) templates. By changing the composition of the annealing solvents, different morphologies such as the concentric lamellar morphology, the winding cylinder morphology, and the irregular hybrid morphology are observed, mainly caused by the annealing-solvent-induced volume change. The morphology of the block copolymer nanostructures can be further confirmed using an HF solution to remove the PDMS domain selectively.

Graphical abstract: Morphology control of three-dimensional nanostructures in porous templates using lamella-forming block copolymers and solvent vapors

  • This article is part of the themed collection: Polymers
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Publication details

The article was received on 19 May 2016, accepted on 12 Sep 2016 and first published on 12 Sep 2016


Article type: Communication
DOI: 10.1039/C6SM01157H
Citation: Soft Matter, 2016,12, 8087-8092
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    Morphology control of three-dimensional nanostructures in porous templates using lamella-forming block copolymers and solvent vapors

    M. Cheng, H. Ko, P. Chung, C. Chang and J. Chen, Soft Matter, 2016, 12, 8087
    DOI: 10.1039/C6SM01157H

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