Issue 45, 2013

Nanoscale surface potential imaging of the photocatalytic TiO2 films on aluminum

Abstract

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.

Graphical abstract: Nanoscale surface potential imaging of the photocatalytic TiO2 films on aluminum

Article information

Article type
Paper
Submitted
19 Jun 2013
Accepted
23 Sep 2013
First published
25 Sep 2013

RSC Adv., 2013,3, 23296-23302

Nanoscale surface potential imaging of the photocatalytic TiO2 films on aluminum

S. Daviðsdóttir, K. Dirscherl, S. Canulescu, R. Shabadi and R. Ambat, RSC Adv., 2013, 3, 23296 DOI: 10.1039/C3RA43082K

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