An in situ real-time x-ray diffraction study of phase segregation in Au-Pt nanoparticles

O. Malis, M. Radu, Derrick Michael Mott, B. Wanjala, J. Luo, C. J. Zhong

研究成果: Article査読

26 被引用数 (Scopus)

抄録

In situ real-time x-ray diffraction was used to study phase segregation and coarsening of Au-Pt nanoparticles supported on silica powder, and porous alumina membranes. Contrary to the expectations from the bulk phase diagram, silica supported Au-Pt nanoparticles have an alloyed structure that is preserved even after extensive annealing at temperatures as high at 700 °C. In stark contrast, alumina supported Au-Pt nanoparticles exhibit a rich phase behaviour that is sensitive to alloy composition and the details of the synthesis process. In particular, low-density as-prepared Au41Pt59 nanoparticles exhibit the signature of incipient phase segregation that develops into full phase separation during annealing at high temperature.

本文言語English
論文番号245708
ジャーナルNanotechnology
20
24
DOI
出版ステータスPublished - 2009 6 19
外部発表はい

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 電子工学および電気工学
  • 機械工学
  • 材料力学
  • 材料科学(全般)

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