Surface structure and electrochemical properties of platinum films grown on SrTiO3(100) substrates

Masahiro Kasai, Hideyuki Dohi

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

We fabricated Pt films on SrTiO3 (STO)(100) using a DC-magnetron sputtering method to investigate the preferred orientation, surface structure, and electrochemical property. A film grown at 400 °C showed the two-dimensional polycrystalline features of Pt(111). Reflection high-energy electron diffraction (RHEED) showed diffraction patterns independent of the in-plane incident angle of the film. Films grown at 600 and 700 °C exhibited a preferred orientation of Pt(100) and (110). The films exhibited the morphology of faceted islands with roughness of several tens of nm, which consisted of two kinds of domains, namely a domain with preferred orientation of (100) and one with (110). The (100) and (110) domains had 45-degree twin boundaries, which were observed as V-shaped streaks by RHEED. The (100) domain was aligned in orientation of [011]Pt//[010]STO, which suggests that the binding strength of the (110) plane at the interface was larger than that of the (100). With a further increase in the growth temperature up to 750 °C, the film primarily showed a preferred orientation of (100) with an in-plane orientation of [010]Pt//[010]STO. The film also showed an island structure; however, atomic force microscopy revealed that the top was atomically flat.

元の言語英語
ページ(範囲)14-22
ページ数9
ジャーナルSurface Science
666
DOI
出版物ステータス出版済み - 12 1 2017

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Platinum
Electrochemical properties
Surface structure
platinum
Substrates
Reflection high energy electron diffraction
high energy electrons
electron diffraction
Growth temperature
strontium titanium oxide
Magnetron sputtering
Diffraction patterns
Atomic force microscopy
magnetron sputtering
roughness
diffraction patterns
Surface roughness
direct current
atomic force microscopy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

これを引用

Surface structure and electrochemical properties of platinum films grown on SrTiO3(100) substrates. / Kasai, Masahiro; Dohi, Hideyuki.

:: Surface Science, 巻 666, 01.12.2017, p. 14-22.

研究成果: ジャーナルへの寄稿記事

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