REACTIVITY OF SILICA THIN-FILMS WITH MONOETHANOLAMINE

Adsorption of 2-amino-1-ethanol (monoethanolamine or MEA) with chemica lly modified silica films has been studied using multi-internal reflec tion (MIR) and X ray photoemission spectroscopy (XPS). MEA does not re act on native silicon oxide. It adsorbs on mixed baron silicon oxide l ayers and on chemically prepared silicon layers through its alcohol te rmination. Our results also suggest the existence of a charge transfer between the nan bonding orbital of the amine termination of the molec ule and the silicon acid site of the 'chemical' oxide layer.