Nanoscale surface potential imaging of the photocatalytic TiO2 ﬁlms on aluminum

Svava Daviðsdóttir; Kai Dirscherl; Stela Canulescu; Rajashekhara Shabadi; Rajan Ambat

doi:10.1039/c3ra43082k

Nanoscale surface potential imaging of the photocatalytic TiO₂ ﬁlms on aluminum

Svava Daviðsdóttir, Kai Dirscherl, Stela Canulescu, Rajashekhara Shabadi, Rajan Ambat

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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.

Original language	English
Journal	R S C Advances
Volume	3
Issue number	45
Pages (from-to)	23296-23302
ISSN	2046-2069
DOIs	https://doi.org/10.1039/c3ra43082k
Publication status	Published - 2013

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title = "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.",

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T1 - Nanoscale surface potential imaging of the photocatalytic TiO2 ﬁlms on aluminum

AU - Daviðsdóttir, Svava

AU - Dirscherl, Kai

AU - Canulescu, Stela

AU - Shabadi, Rajashekhara

AU - Ambat, Rajan

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

U2 - 10.1039/c3ra43082k

DO - 10.1039/c3ra43082k

M3 - Journal article

SN - 2046-2069

VL - 3

SP - 23296

EP - 23302

JO - R S C Advances

JF - R S C Advances

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