Rare gas coadsorption with Cs or K on Ag(111)

Autor:	G. S. Leatherman, Renee D. Diehl
Rok vydání:	1997
Předmět:	Rare gas Adsorption Electron diffraction Chemical physics Chemistry Desorption Inorganic chemistry Materials Chemistry Work function Surfaces and Interfaces Condensed Matter Physics Alkali metal Surfaces Coatings and Films
Zdroj:	Surface Science. 380:455-467
ISSN:	0039-6028
DOI:	10.1016/s0039-6028(97)00043-5
Popis:	Rare gas (RG) coadsorption with submonolayer amounts of Cs or K on Ag(111) was studied using low-energy electron diffraction (LEED). A crossover in the alkali-RG interaction from repulsive to attractive was observed as a function of alkali species and of alkali coverage. The KRG interaction was observed to be repulsive at all coverages, while the CsRG interaction was observed to be attractive at low Cs coverages and apparently repulsive at high Cs coverages. For the K + RG adsorption system, desorption data were analyzed to determine the spreading pressure in the alkali layer, thus showing that RG can be used as a 2D manometer in some coadsorption systems. From the spreading pressure it is possible to obtain some information about the properties of the adsorbed alkali such as the energy differences between commensurate and incommensurate phases. We also demonstrate that work function measurements from such coadsorption systems do not necessarily have a simple interpretation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1c727edd5d1cb7fca7df2c7b47cdf2a8 https://doi.org/10.1016/s0039-6028(97)00043-5 Zobrazit plný text záznamu Full Text from ScienceDirect