Semiconducting properties of self-organized TiO2 nanotubes

The semiconducting properties of anodic grown TiO2-nanotubes were analyzed by means of the potential dependence of the interfacial capacity under different electrolyte and illumination conditions. The experimental results offer evidence for a duplex oxide film conformed by the bottom and wall of por...

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Bibliographic Details
Published inElectrochimica acta Vol. 52; no. 12; pp. 4167 - 4176
Main Author MUNOZ, A. G
Format Journal Article
LanguageEnglish
Published Oxford Elsevier 01.03.2007
Subjects
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Photoelectrochemistry. Electrochemiluminescence
Photoelectrochemistry
Titanium IV Oxides
Semiconductor materials
Mott-Schottky
Nanotube
Impedance spectroscopy
TiO2-nanotubes
Self organization
A-semiconductors
Medium effect
Equivalent circuit
pH
Capacitance
Semiconductivity
Electrochemical impedance spectroscopy
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Summary:The semiconducting properties of anodic grown TiO2-nanotubes were analyzed by means of the potential dependence of the interfacial capacity under different electrolyte and illumination conditions. The experimental results offer evidence for a duplex oxide film conformed by the bottom and wall of pores with different density of donors and concentration of surface states. The surface extension offered by the walls of oxide tubes is manifested in surface related effects such as the shift of the flat band potential and trapping of photoelectrons.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.11.035