Nonwetting and sticking of the heavy rare gases on potassium surfaces |
| |
Affiliation: | 1. LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universités, UVSQ, CNRS, 4 place Jussieu, Paris 75005, France;2. LATMOS/IPSL, UVSQ Université Paris-Saclay, UPMC Univ. Paris 06, CNRS, Guyancourt, France;3. University of Virginia, Charlottesville, VA, USA;4. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA |
| |
Abstract: | We have investigated the adsorption, growth, and desorption of Ar, Kr, and Xe on K mono- and multilayers on Ru(001) at 6.5 K. In all cases, three-dimensional growth from very low rare gas (RG) coverages on, clearly indicates nonwetting, and the desorption energies for low RG coverages are much lower than the RG sublimation energies, and lower on K multi- than on K monolayers. Nevertheless, initial sticking coefficients of the RG on both types of K layers are well defined and not dominated by nucleation or by impurities or defects. Their values and dependence on type of substrate can be understood qualitatively, and quantitatively for Ar in terms of a recently developed quantum mechanical model, extending adsorption dynamics studies to nonwetting systems. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|