HAADF study of Au-Pt core-shell bimetallic nanoparticles

D. Garcia-Gutierrez, C. Gutierrez-Wing, M. Miki-Yoshida, M. Jose-Yacaman

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

Bimetallic Pt/Au nanoparticles have been synthesized by the polyol method, stabilized by poly (vinylpyrrolidone) (PVP). The structure of the particles has been determined using transmission electron microscopy and a HAADF (High Angle Annular Dark Field) technique. Some particles present a core-shell structure, with a contrast not predicted by simple atomic number contrast (≈ Z 2). Strain fields present in the core-shell interface are thought to be the cause of this contrast, which depends on the orientation of the particle with respect to the electron beam. We propose HAADF as a useful technique to identified core-shell structures in nanoparticle systems.

Original languageEnglish (US)
Pages (from-to)481-487
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume79
Issue number3
DOIs
StatePublished - Aug 2004
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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