A combination of photoemission, atomic force, and scanning tunneling microscopy/spectroscopy measurements shows that excess electrons in the TiO2 anatase (101) surface are trapped at step edges. Consequently, steps act as preferred adsorption sites for O-2. In density functional theory calculations electrons localize at clean step edges, this tendency is enhanced by O vacancies and hydroxylation. The results show the importance of defects for the wide-ranging applications of titania.
Setvin M, Hao XF, Daniel B, Pavelec J, Novotny Z, Parkinson GS, et al. (2014). Charge Trapping at the Step Edges of TiO2 Anatase (101). ANGEWANDTE CHEMIE. INTERNATIONAL EDITION, 53(18), 4714-4716 [10.1002/anie.201309796].
Charge Trapping at the Step Edges of TiO2 Anatase (101)
Franchini CSupervision
;
2014
Abstract
A combination of photoemission, atomic force, and scanning tunneling microscopy/spectroscopy measurements shows that excess electrons in the TiO2 anatase (101) surface are trapped at step edges. Consequently, steps act as preferred adsorption sites for O-2. In density functional theory calculations electrons localize at clean step edges, this tendency is enhanced by O vacancies and hydroxylation. The results show the importance of defects for the wide-ranging applications of titania.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
