Chemical Physics Letters, Vol.689, 105-110, 2017
Adsorption of alcohols on a two-dimensional SiO2 single crystal - Alcohol adsorption on silicatene
The adsorption kinetics of alcohols (methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol) was studied on monoatomic, two-dimensional SiO2 single crystals (silicatene) using thermal desorption spectroscopy (TDS). Silicatene was grown on Mo(112) at ultra-high vacuum. In contrast to Mo, the alcohols physisorb molecularly on the hydrophobic SiO2/Mo surface. Zero coverage binding energies vary from 46.5 to 65.5 kJ/mol and increase with molecular size. Silicatene was characterized by Auger electron spectroscopy (AES), low energy electron diffraction (LEED), and water TDS. (C) 2017 Elsevier B.V. All rights reserved.
Keywords:Kinetics;Silica;2D silica films;2D crystals;Two-dimensional systems;Silicatene;Alcohols;Temperature programmed desorption;Auger electron spectroscopy;LEED