Annealing-promoted unidirectional migration of organic-modified nanoparticles embedded two-dimensionally in polymer thin films

Yang Liu, Takumi Kato, Masaki Kubo, Ken Ichi Sugioka, Takao Tsukada, Seiichi Takami, Tadafumi Adschiri

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The spatial structures of oleic acid-modified CeO2 nanoparticles in polystyrene (PS) thin films spin-coated on silicon substrates were observed by transmission electron microscopy, when the films underwent thermal annealing above the glass-transition temperature of PS. Before annealing, the nanoparticles have segregated to the surface of the films, and formed two-dimensional spatial structures in the PS films. Then, the nanoparticles migrated away from the film surface to the substrate/film interface during thermal annealing, maintaining the two-dimensional spatial structures. In addition, we demonstrated that such unidirectional migration of nanoparticles across the PS film occurs regardless of the characteristics of the substrate surface, the concentration of nanoparticles, and the thickness of the films.

Original languageEnglish
Article number42760
JournalJournal of Applied Polymer Science
Volume132
Issue number45
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • Composites
  • Films
  • Microscopy
  • Nanoparticles
  • Nanowires and nanocrystals
  • Polystyrene

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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