Architectural Effects of Organic Nanoparticles on Block Copolymer Orientation

Hyun Suk Wang, Anzar Khan, Youngson Choe, June Huh, Joona Bang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Organic nanoparticles (ONPs) in the form of star polymers and single chain nanoparticles (SCNPs) are used as fillers in block copolymer (BCP)/ONP nanocomposite thin films to induce perpendicular microdomains without any substrate treatment. The nonselective ONPs for both blocks of BCP neutralize the substrate and the free surface via an entropy-driven boundary surface segregation process, which differs markedly from the conventional neutralization process relying on surface chemistry. To examine the architectural effect of ONPs for surface segregation, neutral star polymers with ∼30, 21, and 6 arms and single-chain nanoparticles (SCNPs) are used as fillers in PS-b-PMMA thin films in an attempt to produce perpendicular microdomains. Consequently, it was observed that ∼30- and 21-arm star polymers and SCNPs, which may behave like hard particles having excluded volume interactions with host BCPs, effectively induced perpendicular microdomains, while soft particle-like 6-arm stars led to morphological compatibilization with BCPs.

Original languageEnglish
Pages (from-to)5025-5032
Number of pages8
JournalMacromolecules
Volume50
Issue number13
DOIs
Publication statusPublished - 2017 Jul 11

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry

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