Collective effects in physical adsorption
- 1 December 1978
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 69 (11) , 5126-5132
- https://doi.org/10.1063/1.436458
Abstract
The collective electronic polarization waves occurring in a regular two-dimensional lattice of rare gas atoms adsorbed on a metallic surface are studied, including interactions mediated by the metallic substrate. The atoms are represented as three-dimensional isotropic harmonic oscillators interacting via electrostatic dipolar forces. The polarization eigenmodes of an isolated monolayer are first determined, from which the cohesive energy of the layer can be deduced from the total zero-point energy of the modes. Then the role of the substrate is introduced by treating the metal first as a perfectly conducting medium (ε=−∞) and then, more appropriately, as a substrate of dynamical dielectric function ε (ω) =1−ω2p/ω2. The monolayer–metal interaction produces a shift of the collective atomic frequencies and of the metal surface plasmon frequencies. From the zero-point energy shift, one obtains an expression of the total interaction energy. Numerical applications are made for a square lattice of Kr adsorbed on metals of various plasmon frequencies.Keywords
This publication has 15 references indexed in Scilit:
- Plasmon-mediated interaction between physically adsorbed atoms — curvature effectSurface Science, 1978
- Physical adsorption and surface plasmonsSurface Science, 1977
- Theory of monolayer physical adsorption. I. Flat surfaceThe Journal of Chemical Physics, 1976
- Monolayer structures of Kr and Xe on Ag(111) and Cu (211)Surface Science, 1976
- Energy of interaction between a monolayer and a dielectric adsorbentJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1976
- Interactions between physically adsorbed moleculesProgress in Surface Science, 1975
- Physical adsorption of xenon on Pd(100)Surface Science, 1971
- Interaction of the van der Waals Type Between Three AtomsThe Journal of Chemical Physics, 1943
- The general theory of molecular forcesTransactions of the Faraday Society, 1937
- On the mutual potential energy of a plane network of doubletsProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1927