Fabrication of high concentration barium titanate/polyvinylpyrrolidone nano-composite thin films and their dielectric properties

Y. Kobayashi, A. Kosuge, M. Konno

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

A simple method for fabricating polyvinylpyrrolidone (PVP) thin films containing barium titanate (BT) nanoparticles on electrodes is proposed. The BT particles that had an average size of ca. 8 nm and a tetragonal crystalline phase were prepared with complex alkoxide methods in the presence of PVP. PVP/ethanol/water solutions containing the BT particles, which were suspended with sonication for 0-12 h, and were spin-coated on ITO glass substrates. Surface roughness was low at a sonication time longer than 4 h. As a BT concentration for the film increased from 0 to 85 wt%, its dielectric constant increased from 7 to 30 with dissipation factors below 0.12. The present method can be used to prepare high capacitance films at low temperatures, which have favorable electrical properties or characteristics.

Original languageEnglish
Pages (from-to)2723-2729
Number of pages7
JournalApplied Surface Science
Volume255
Issue number5 PART 2
DOIs
Publication statusPublished - 2008 Dec 30

Keywords

  • Barium titanate
  • Dielectric property
  • Nano-composite
  • Nanoparticle
  • Polyvinylpyrrolidone
  • Thin film

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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