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Kim, Jaeup U.
Nanostructured Polymer Materials Theory Lab
Research Interests
  • block copolymers, soft matter, nanostructures & patterning, machine learning

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High-throughput preparation of complex multi-scale patterns from block copolymer/homopolymer blend films

Cited 2 times inthomson ciCited 2 times inthomson ci
Title
High-throughput preparation of complex multi-scale patterns from block copolymer/homopolymer blend films
Author
Park, HyungminKim, Jaeup U.Park, Soojin
Keywords
2-vinylpyridine; Blend films; Block copolymer micelles; Casting process; Copolymer micelles; Gold precursor; Gold-nanoparticle arrays; High-throughput; Macro phase separation; Macro-domains; Macrostructures; Methyl methacrylates; Multiscale surface; Multiscales; Nano-structured; Native oxides; Silicon surfaces; Spin-coating process; Strong interaction; Wetting layer
Issue Date
2012-02
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.4, no.4, pp.1362 - 1367
Abstract
A simple, straightforward process for fabricating multi-scale micro-and nanostructured patterns from polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP)/poly(methyl methacrylate) (PMMA) homopolymer in a preferential solvent for PS and PMMA is demonstrated. When the PS-b-P2VP/PMMA blend films were spin-coated onto a silicon wafer, PS-b-P2VP micellar arrays consisting of a PS corona and a P2VP core were formed, while the PMMA macrodomains were isolated, due to the macrophase separation caused by the incompatibility between block copolymer micelles and PMMA homopolymer during the spin-coating process. With an increase of PMMA composition, the size of PMMA macrodomains increased. Moreover, the P2VP blocks have a strong interaction with a native oxide of the surface of the silicon wafer, so that the P2VP wetting layer was first formed during spin-coating, and PS nanoclusters were observed on the PMMA macrodomains beneath. Whereas when a silicon surface was modified with a PS brush layer, the PS nanoclusters underlying PMMA domains were not formed. The multi-scale patterns prepared from copolymer micelle/homopolymer blend films are used as templates for the fabrication of gold nanoparticle arrays by incorporating the gold precursor into the P2VP chains. The combination of nanostructures prepared from block copolymer micellar arrays and macrostructures induced by incompatibility between the copolymer and the homopolymer leads to the formation of complex, multi-scale surface patterns by a simple casting process.
URI
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DOI
10.1039/c2nr11792d
ISSN
2040-3364
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SNS_Journal Papers
ECHE_Journal Papers
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