From bilayer to monolayer growth: Temperature effects in the growth of Ru on Pt(1 1 1)

A. Berkó, A. Bergbreiter, H. E. Hoster, R. J. Behm

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

At temperatures around 373 K, Ru growth on Pt(1 1 1) proceeds via nucleation and growth of bilayer islands [H.E. Hoster et al., Phys. Chem. Chem. Phys. 3 (2001) 337]. The influence of the deposition temperature on the Ru growth behavior on Pt(1 1 1) was studied by scanning tunneling microscopy (STM) and Auger electron spectroscopy (AES) in the temperature range between 303 and 773 K. The data reveal a distinct change in the growth characteristics, most important the change from the growth of bilayer Ru islands to monolayer islands, at temperatures between 523 and 573 K. Based on AES data and on atomic resolution STM images, these changes are associated with the onset and increasing contribution of surface alloy formation via Pt-Ru exchange and, at T > 673 K, alloy formation in near surface regions. Consequences of these data for the mechanism of bilayer growth and the underlying physical origin are discussed.

Original languageEnglish
Pages (from-to)2556-2563
Number of pages8
JournalSurface Science
Volume603
Issue number16
DOIs
Publication statusPublished - Aug 15 2009

Fingerprint

Growth temperature
Thermal effects
temperature effects
Monolayers
Scanning tunneling microscopy
Auger electron spectroscopy
Auger spectroscopy
electron spectroscopy
scanning tunneling microscopy
Temperature
temperature
Nucleation
nucleation

Keywords

  • Exchange
  • Growth
  • Metal epitaxy
  • Pt(1 1 1)
  • Ru
  • Scanning tunneling microscopy

ASJC Scopus subject areas

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

Cite this

From bilayer to monolayer growth : Temperature effects in the growth of Ru on Pt(1 1 1). / Berkó, A.; Bergbreiter, A.; Hoster, H. E.; Behm, R. J.

In: Surface Science, Vol. 603, No. 16, 15.08.2009, p. 2556-2563.

Research output: Contribution to journalArticle

Berkó, A. ; Bergbreiter, A. ; Hoster, H. E. ; Behm, R. J. / From bilayer to monolayer growth : Temperature effects in the growth of Ru on Pt(1 1 1). In: Surface Science. 2009 ; Vol. 603, No. 16. pp. 2556-2563.
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AB - At temperatures around 373 K, Ru growth on Pt(1 1 1) proceeds via nucleation and growth of bilayer islands [H.E. Hoster et al., Phys. Chem. Chem. Phys. 3 (2001) 337]. The influence of the deposition temperature on the Ru growth behavior on Pt(1 1 1) was studied by scanning tunneling microscopy (STM) and Auger electron spectroscopy (AES) in the temperature range between 303 and 773 K. The data reveal a distinct change in the growth characteristics, most important the change from the growth of bilayer Ru islands to monolayer islands, at temperatures between 523 and 573 K. Based on AES data and on atomic resolution STM images, these changes are associated with the onset and increasing contribution of surface alloy formation via Pt-Ru exchange and, at T > 673 K, alloy formation in near surface regions. Consequences of these data for the mechanism of bilayer growth and the underlying physical origin are discussed.

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