Adsorption of mercury on gold and silver surfaces

Markus Levlin, Ermo Ikävalko, Timo Laitinen

Research output: Contribution to journalArticleScientificpeer-review

70 Citations (Scopus)

Abstract

In order to study the adsorption mechanism of Hg on Au and Ag substrates, thin film Au(111) and Ag(111) substrates were exposed to gaseous metallic mercury, while the mercury concentration, substrate temperature, and exposure length were varied. The resulting changes in the surface morphology of the substrates were studied with scanning tunneling microscopy (STM). The amount of adsorbed Hg required to cause saturation, i.e. a decrease in the adsorption rate was found to be dependent on the mercury concentration and substrate temperature. The observations lead to the conclusion that the adsorption includes place exchange processes and concerted adsorption of more than one Hg atom in one process. The results show that the collection efficiency of single-crystalline surfaces is a function of both mercury concentration and temperature. Therefore, results from measurements performed at different conditions using single-crystalline surfaces may not be comparable.
Original languageEnglish
Pages (from-to)577-586
Number of pages10
JournalFresenius' Journal of Analytical Chemistry
Volume365
Issue number7
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

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Mercury
Silver
Gold
Adsorption
Substrates
Temperature
Scanning Tunnelling Microscopy
Crystalline materials
Scanning tunneling microscopy
Surface morphology
Thin films
Atoms

Cite this

Levlin, Markus ; Ikävalko, Ermo ; Laitinen, Timo. / Adsorption of mercury on gold and silver surfaces. In: Fresenius' Journal of Analytical Chemistry. 1999 ; Vol. 365, No. 7. pp. 577-586.
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Adsorption of mercury on gold and silver surfaces. / Levlin, Markus; Ikävalko, Ermo; Laitinen, Timo.

In: Fresenius' Journal of Analytical Chemistry, Vol. 365, No. 7, 1999, p. 577-586.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Laitinen, Timo

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PY - 1999

Y1 - 1999

N2 - In order to study the adsorption mechanism of Hg on Au and Ag substrates, thin film Au(111) and Ag(111) substrates were exposed to gaseous metallic mercury, while the mercury concentration, substrate temperature, and exposure length were varied. The resulting changes in the surface morphology of the substrates were studied with scanning tunneling microscopy (STM). The amount of adsorbed Hg required to cause saturation, i.e. a decrease in the adsorption rate was found to be dependent on the mercury concentration and substrate temperature. The observations lead to the conclusion that the adsorption includes place exchange processes and concerted adsorption of more than one Hg atom in one process. The results show that the collection efficiency of single-crystalline surfaces is a function of both mercury concentration and temperature. Therefore, results from measurements performed at different conditions using single-crystalline surfaces may not be comparable.

AB - In order to study the adsorption mechanism of Hg on Au and Ag substrates, thin film Au(111) and Ag(111) substrates were exposed to gaseous metallic mercury, while the mercury concentration, substrate temperature, and exposure length were varied. The resulting changes in the surface morphology of the substrates were studied with scanning tunneling microscopy (STM). The amount of adsorbed Hg required to cause saturation, i.e. a decrease in the adsorption rate was found to be dependent on the mercury concentration and substrate temperature. The observations lead to the conclusion that the adsorption includes place exchange processes and concerted adsorption of more than one Hg atom in one process. The results show that the collection efficiency of single-crystalline surfaces is a function of both mercury concentration and temperature. Therefore, results from measurements performed at different conditions using single-crystalline surfaces may not be comparable.

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