How Sulfur Controls Nucleation of Ag Islands on Ag(111)

TitleHow Sulfur Controls Nucleation of Ag Islands on Ag(111)
Publication TypeJournal Article
Year of Publication2011
AuthorsShen MM, Jenks CJ, Evans JW, Thiel PA
Journal TitleTopics in Catalysis
Date Published03
Type of ArticleProceedings Paper
ISBN Number1022-5528
Accession NumberISI:000287496100011
Keywordsag(111), au(111), by-layer growth, homoepitaxy, HYDRODESULFURIZATION, microscopy, nanoclusters, oxygen, Scanning tunneling, silver, stm, SULFUR, surface, thin-film growth

Pre-adsorbed sulfur controls nucleation of Ag islands on Ag(111), at coverages above a very small critical value. Sulfur can exert opposite effects: it accelerates mass transfer of Ag to steps and hence inhibits nucleation under some conditions, but it impedes mass transfer and hence enhances nucleation under others. The effect depends upon sulfur coverage and temperature. The inhibition or acceleration of mass transfer correlates with the existence or absence of a semi-static, ordered arrangement of Ag3S3 clusters.

URL<Go to ISI>://000287496100011
Alternate JournalTop. Catal.