2D nanodot and nanowires arrays of titania and silica with tunable morphologies via self-assembled block copolymers and sol-gel chemistry

Min Ah Cha, Yoon Hee Jang, Dong Wook Kim, Dong Ha Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Hybrid thin films composed of poly(styrene-b-ethylene oxide)(PS-b-PEO) and TiO2 (or SiO2) with controlled morphology were fabricated using cooperative sol-gel chemistry and block copolymer(BCP) self-assembly. The inorganic precursors were selectively incorporated into PEO, and the volume fraction of PEO domain is increased with increasing sol-gel precursor/BCP ratio. The generated films exhibit various surface morphologies ranging from 0D nanodot to 1D nanowire arrays. If the composition of hybrid sol-gel/BCP is symmetric, the resulting film has nanowire morphology, whereas nanodot pattern was obtained from asymmetric composition. Given the same sol-gel precursor /BCP ratio, more uniform arrays of inorganic nanodots were induced when BCP template with asymmetric composition was employed.

Original languageEnglish
Pages (from-to)387-393
Number of pages7
JournalJournal of the Korean Chemical Society
Volume52
Issue number4
DOIs
StatePublished - 20 Aug 2008

Keywords

  • Block copolymer
  • Nanodot
  • Nanowire
  • Self-assembly
  • Silica
  • Sol-gel process
  • Titania

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