Artículos de revistas
Detection of the adsorption of water monolayers through the ion oscillation frequency in the magnesium oxide lattice by means of low energy electron diffraction
Fecha
2016-03Registro en:
2158-3226
arXiv: 1511.05074
arXiv:1511.05074v1
Inis RN:48057818
10.1063/1.4944912
Autor
Guevara Bertsch, Milena
Ramírez Hidalgo, Gustavo
Chavarría Sibaja, Andrés
Avendaño Soto, Esteban
Araya Pochet, José
Herrera Sancho, Óscar Andrey
Institución
Resumen
We investigate the variation of the oscillation frequency of the Mg2+ and O2− ions in the magnesium oxide lattice due to the interactions of the surface with water monolayers by means of Low Energy Electron Diffraction. Our key result is a new technique to determine the adsorbate vibrations produced by the water monolayers on the surface lattice as a consequence of their change in the surface Debye temperature and its chemical shift. The latter was systematically investigated for different annealing times and for a constant external thermal perturbation in the range of 110–300 K in order to accomplish adsorption or desorption of water monolayers in the surface lattice.