Colour centres at the surface of alkali-earth oxides. A new hypothesis on the location of surface electron traps
MC Paganini, M Chiesa, E Giamello, S Coluccia… - Surface science, 1999 - Elsevier
Irradiation of highly dehydrated MgO by UV light in the presence of surface adsorbed
hydrogen leads to the formation of particular types of surface colour centres indicated with
F+ S (H)(one-electron, paramagnetic) and FS (H)(two electrons, diamagnetic). FS centres
are the surface counterparts of the well-known F colour centres formed in the bulk of ionic
solids by high-energy irradiation or metal addition. In the particular case of F+ S (H), the
unpaired electron is in magnetic interaction with a nearby proton belonging to a hydroxyl …
hydrogen leads to the formation of particular types of surface colour centres indicated with
F+ S (H)(one-electron, paramagnetic) and FS (H)(two electrons, diamagnetic). FS centres
are the surface counterparts of the well-known F colour centres formed in the bulk of ionic
solids by high-energy irradiation or metal addition. In the particular case of F+ S (H), the
unpaired electron is in magnetic interaction with a nearby proton belonging to a hydroxyl …
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