The energetics of mercury adsorption on Cu(100)

P. A. Dowben, Y. J. Kime, C. W. Hutchings, Wei Li, Gianfranco Vidali

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Abstract

We have investigated the adsorption of mercury overlayers on Cu(100) by atom beam scattering, low energy electron diffraction and angle resolved photoemission. From our data we have calculated the isosteric heats in the adsorbed Hg layer on Cu(100) and compared these with results obtained for mercury on Fe(100), W(100) and Ni(100). We observe changes in the isosteric heat of adsorption that can be associated with the ordering of a c(2 × 2) Hg overlayer phase and the transition from a c(2 × 2) overlayer to a c(4 × 4) overlayer. The isosteric heat of adsorption is 0.50 ± 0.07 eV/atom (48 ± 7 kJ/mol) at zero coverage and reaches a maximum of 0.73 ± 0.04 eV/atom (70 ± 4 kJ/mol). From a combination of ABS and LEED, the structures of the two equilibrium ordered phases of Hg on Cu(100) have been identified, as well as the structures of several non-equilibrium phases.

Original languageEnglish (US)
Pages (from-to)113-122
Number of pages10
JournalSurface Science
Volume230
Issue number1-3
DOIs
StatePublished - May 1 1990

Fingerprint

Mercury
Adsorption
heat
Atoms
adsorption
atoms
Low energy electron diffraction
Photoemission
Phase equilibria
photoelectric emission
electron diffraction
Scattering
scattering
Hot Temperature
energy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Dowben, P. A., Kime, Y. J., Hutchings, C. W., Li, W., & Vidali, G. (1990). The energetics of mercury adsorption on Cu(100). Surface Science, 230(1-3), 113-122. https://doi.org/10.1016/0039-6028(90)90020-9

The energetics of mercury adsorption on Cu(100). / Dowben, P. A.; Kime, Y. J.; Hutchings, C. W.; Li, Wei; Vidali, Gianfranco.

In: Surface Science, Vol. 230, No. 1-3, 01.05.1990, p. 113-122.

Research output: Contribution to journalArticle

Dowben, PA, Kime, YJ, Hutchings, CW, Li, W & Vidali, G 1990, 'The energetics of mercury adsorption on Cu(100)', Surface Science, vol. 230, no. 1-3, pp. 113-122. https://doi.org/10.1016/0039-6028(90)90020-9
Dowben, P. A. ; Kime, Y. J. ; Hutchings, C. W. ; Li, Wei ; Vidali, Gianfranco. / The energetics of mercury adsorption on Cu(100). In: Surface Science. 1990 ; Vol. 230, No. 1-3. pp. 113-122.
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N2 - We have investigated the adsorption of mercury overlayers on Cu(100) by atom beam scattering, low energy electron diffraction and angle resolved photoemission. From our data we have calculated the isosteric heats in the adsorbed Hg layer on Cu(100) and compared these with results obtained for mercury on Fe(100), W(100) and Ni(100). We observe changes in the isosteric heat of adsorption that can be associated with the ordering of a c(2 × 2) Hg overlayer phase and the transition from a c(2 × 2) overlayer to a c(4 × 4) overlayer. The isosteric heat of adsorption is 0.50 ± 0.07 eV/atom (48 ± 7 kJ/mol) at zero coverage and reaches a maximum of 0.73 ± 0.04 eV/atom (70 ± 4 kJ/mol). From a combination of ABS and LEED, the structures of the two equilibrium ordered phases of Hg on Cu(100) have been identified, as well as the structures of several non-equilibrium phases.

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