Three-dimensional assembly of gold nanoparticles in spherically confined microphase-separation structures of block copolymers

Hiroshi Yabu, Tatsuya Jinno, Kazutaka Koike, Takeshi Higuchi, Masatsugu Shimomura

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Three-dimensional (3D) assemblies of metal nanoparticles are promising materials for plasmonic materials. Metal nanoparticles have unique surface plasmon resonances, ranging from ultraviolet to visible light wavelengths, depending on their metal species, size, and shape. The arrangements and spacing of the nanoparticles also strongly affect the plasmonic properties. The microphase separation of block copolymers can create a nanoscopic periodic structure, where metal nanoparticle assemblies are arranged along the microphase separation structure. In this paper, we construct 3D Au nanoparticle assemblies embedded in the microphase separation structures of confined block copolymers, in the pores of inverse opals. Polymer-stabilized Au nanoparticles were synthesized, and submicrometer poly(styrene) (PS) colloidal crystals were prepared using a simple coating method. After molding a PS colloidal crystal with poly(vinyl alcohol) (PVA), block copolymers and Au nanoparticles were introduced into the PVA inverse opal from solution. The inner nanostructures were analyzed by transmission electron microscopy (TEM).

Original languageEnglish
Pages (from-to)5868-5873
Number of pages6
JournalMacromolecules
Volume44
Issue number15
DOIs
Publication statusPublished - 2011 Aug 9

ASJC Scopus subject areas

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

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