Phase behavior of poly(9-(4-vinylbenzyl)adenine)-<i>block</i>-polystyrene copolymers

ORAL

Abstract

In this study, we successfully synthesized adenine-containing block copolymers, poly(9-(4-vinylbenzyl)adenine)-block-polystyrene (PVBA-b-PS), using reversible addition-fragmentation chain transfer (RAFT) polymerization and characterized them by size exclusion chromatography, and nuclear magnetic resonance spectroscopy.
The phase behavior of PVBA-b-PS with various volume fractions of PS block (fPS) was investigated via small-angle X-ray scattering and transmission electron microscopy. With increasing fPS from 0.1 to 0.8, body-centered-cubic spheres of PS, hexagonally packed (HEX) cylinders of PS, lamellae, and HEX cylinders of PVBA were observed. Interestingly, PVBA-b-PS with fPS = 0.75 showed asymmetric lamellar microdomains.
We also prepared thin film of PVBA-b-PS on a substrate as a template for spatial arrangement of gold nanoparticles (AuNPs). When the surface of AuNPs was modified with thymine-containing polymer chains, AuNPs were selectively sequestered into PVBA microdomains through the complementary hydrogen bonding between thymine and adenine units.

*This work was supported by the National Creative Research Initiative Program supported by the National Research Foundation of KOREA(2013R1A3A2042196).

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Presenters

  • Eunseol Kim

    • Pohang University of Science and Technology

Authors

  • Eunseol Kim

    • Pohang University of Science and Technology

  • Avnish Kumar Mishra

    • Pohang University of Science and Technology

  • Chungryong Choi

    • Pohang University of Science and Technology

  • Mooseong Kim

    • Pohang University of Science and Technology

  • Seungkyoo Park

    • Pohang University of Science and Technology

  • Soyeong Park

    • Pohang University of Science and Technology

  • Seonghyeon Ahn

    • Pohang University of Science and Technology

  • Jin Kim

    • Pohang University of Science and Technology