Journal article
Nanoscale surface potential imaging of the photocatalytic TiO2 films on aluminum
Department of Mechanical Engineering, Technical University of Denmark1
Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark2
DFM - Dansk Fundamental Metrologi A/S3
Department of Photonics Engineering, Technical University of Denmark4
Optical Microsensors and Micromaterials, Department of Photonics Engineering, Technical University of Denmark5
Université Lille Nord de France6
The change in the surface potential of TiO2 coatings upon UV-illumination was investigated on the nanoscale using Scanning Kelvin Probe Force microscopy and on the micro-scale using photo-electrochemical measurements. A good correlation between the two techniques was obtained. The changes in the surface potential of TiO2 coatings upon UV-illumination are closely correlated to the band gap and thickness of the coatings.
The inhomogeneity surface potential distribution of a 100 nm TiO2 film indicates a heterogeneous coating. Transition to a homogeneous surface potential distribution was observed with increasing thickness of the TiO2 coating.
| Language: | English |
|---|---|
| Year: | 2013 |
| Pages: | 23296-23302 |
| ISSN: | 20462069 |
| Types: | Journal article |
| DOI: | 10.1039/c3ra43082k |
| ORCIDs: | Canulescu, Stela and Ambat, Rajan |
