By contacting the MgO surface with Mg vapours at 853–873 K, a deep-blue-violet sample is formed which is characterized by an intense absorption at 18500 cm−1 (2.3 eV) (as detected by diffuse reflectance spectroscopy) and by two partially overlapped ESR signals. These spectroscopic manifestations are assigned to Fs+ and Fns+ aggregated surface centres. These defective surface centres are very reactive towards simple molecules.
Defect centres on Mg-doped MgO surfaces
ZECCHINA, Adriano;SCARANO, Domenica;COLUCCIA, Salvatore;GIAMELLO, Elio
1988-01-01
Abstract
By contacting the MgO surface with Mg vapours at 853–873 K, a deep-blue-violet sample is formed which is characterized by an intense absorption at 18500 cm−1 (2.3 eV) (as detected by diffuse reflectance spectroscopy) and by two partially overlapped ESR signals. These spectroscopic manifestations are assigned to Fs+ and Fns+ aggregated surface centres. These defective surface centres are very reactive towards simple molecules.
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