Appearance of surface states at the TiO2/H2O interface after deposition of Fe atoms on the TiO2 surface

✍ Scribed by Kenkichiro Kobayashi; Miwa Ikeuti; Genji Okada

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 466 KB
• Volume: 174
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)80099-y

✦ Synopsis

The electronic structure of the TiO, surface in contact with an electrolytic solution is studied by means of the conductance and capacitance-relaxation methods. The deposition of Fe atoms on the TiOz surface results in the formation of surface states. The surface-state density is located at about 0.6 eV below the bottom of the conduction band of TiO,. The estimated total density of the surface states ranges from 1.9~ 10" to 2.8~ lOI cm-'. The origin of the surface states is tentatively assigned to the chemisorption bonds between the surface 0 (or Ti) atoms and the adsorbed Fe atoms which may be coordinated with some oxygen atoms.