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Author

Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Directed Self-Assembly of Asymmetric Block Copolymers in Thin Films Driven by Uniaxially Aligned Topographic Patterns

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Title
Directed Self-Assembly of Asymmetric Block Copolymers in Thin Films Driven by Uniaxially Aligned Topographic Patterns
Author
Lee, Dong-EunRyu, JaegeonHong, DongkiPark, SoojinLee, Dong HyunRussell, Thomas P.
Keywords
block copolymer;  directed self-assembly;  solvent-annealing;  thin films;  topographic patterns
Issue Date
201802
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.12, no.2, pp.1642 - 1649
Abstract
We present a simple, versatile approach to generate highly ordered nanostructures of block copolymers (BCPs) using rubbed surfaces. A block of poly(tetrafluoroethylene) (PTFE) was dragged across a flat substrate surface above the melting point of PTFE transferring a highly aligned PTFE topographic pattern to the substrate. Si wafer, glass, and polyimide films were used as substrates. Thin films of cylinder-forming asymmetric polystyrene-block-poly(2-vinylpyridine) copolymers (S2VPs) were solvent annealed on the surfaces having the transferred surface pattern to induce their directed self-assembly. Cylinders of P2VP oriented normal to the surface are markedly aligned along the rubbing direction and used as templates to generate extremely uniform arrays of various metallic nanoparticles of gold, silver, and platinum over a large area.
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DOI
http://dx.doi.org/10.1021/acsnano.7b08226
ISSN
1936-0851
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