Stability of water monolayers on Ru(0001): Thermal and electronically induced dissociation

Autor:	Krassimir L. Kostov, Nadir S. Faradzhev, Dietrich Menzel, Peter Feulner, Theodore E. Madey
Rok vydání:	2005
Předmět:	X-ray photoelectron spectroscopy Chemistry Thermal desorption spectroscopy Desorption Monolayer Analytical chemistry Electron beam processing General Physics and Astronomy Wetting Physical and Theoretical Chemistry Photochemistry Dissociation (chemistry) Electron ionization
Zdroj:	Chemical Physics Letters. 415:165-171
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2005.08.119
Popis:	To clarify conflicting reports on the composition and stability of H2O and D2O adsorbates on Ru(0 0 0 1), we have conducted correlated experiments in two laboratories using X-ray photoelectron spectroscopy and thermal desorption spectroscopy, without and after controlled electron irradiation. Both species form molecular wetting layers; D2O stays molecular to desorption while H2O undergoes a thermal conversion that has been interpreted as partial dissociation. Electron impact leads to this conversion for both H2O and D2O with very high cross-sections (in the high 10−16 cm2 range at 100–200 eV) and low threshold energies. These effects may explain discrepancies in recent reports.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::96f3697621c4fcbee139f89a6025d6f7 https://doi.org/10.1016/j.cplett.2005.08.119 Zobrazit plný text záznamu Full Text from ScienceDirect