Effect of step edges on the growth of Pt thin films on oxide single-crystal substrates

Tadashi Shiota, Hiroki Ito, Naoki Wakiya, Jeffrey Cross, Osamu Sakurai, Kazuo Shinozaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

To study the effect of step edges on the growth of Pt thin films on oxide substrates, Pt films were grown on SrTiO3(100), rutile TiO 2(100), and Al2O3(11-20) stepped surfaces at 673 and 973K by pulsed laser deposition. No clear effect due to the step edges on the film growth was found on the SrTiO3 at 673K. However, the Pt grains were larger in size at the step edges than on the terraces at 973K. The estimated length of the Pt surface diffusion was longer than the average terrace width at 973K and shorter at 673 K. Similar growth behavior was also observed on the TiO2 at 973K, while there was no clear effect caused by the step edges in the case of the Al2O3. The Pt diffusion length was estimated to be longer than the terrace width on the TiO2 and shorter on the Al2O3. The effect of the step edges can therefore be understood by considering the Pt surface diffusion.

Original languageEnglish
Pages (from-to)278-282
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume121
Issue number1411
DOIs
Publication statusPublished - Mar 2013
Externally publishedYes

Keywords

  • Oxide single crystal
  • Platinum
  • Stepped surface
  • Surface diffusion
  • Thin film growth

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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