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conferenceseries
.com
Volume 7
Biosensors Journal
ISSN: 2090-4967
Electrochemistry 2018
June 11-12, 2018
June 11-12, 2018 | Rome, Italy
4
th
International Conference on
Electrochemistry
Electrochemical control of the oxide film growth on niobium
Michał Stępień
and
Krzysztof Fitzner
AGH University of Science and Technology, Poland
D
epending on the thickness of the oxide layer on niobium different properties of this material can be obtained, which can
be exploited in sensing, decorative materials, electronic paper and displays. The aim of this work is to produce the oxide
layer in the controlled way utilizing electrochemical experiment. The layer of the oxide will be formed by anodization of Nb
electrode in acidic aqueous solution. Then, the electrochemical impedance spectrometry (EIS) is used to control the thickness
of the growing layer due to the relation:
ܥ
ൌ
ߝ
ߝ
ܣ
݀ ՜݀ൌ
ߝ
ߝ
ܥ ܣ
where: ε
0
– permittivity of the vacuum; ε
r
– permittivity of the oxide film;
A – geometric area of the oxide; d – barrier oxide thickness; C – capacitance obtained from EIS after proper choice of the
equivalent circuit. However, successful control requires exact knowledge of dielectric constant of niobium oxide. Depending
on oxidation conditions, different values of εr can be obtained. Therefore, this value will be verified by using simultaneously
EIS and ellipsometric measurements.
Recent Publications:
1. Arsova I et al. (2006) Electrochemical formation of anodic oxide films on Nb surfaces: ellipsometric and Raman
spectroscopical studies. Journal of Solid State Electrochemistry 11(2):209-214.
2. Komatsu I et al. (2016) Color change mechanism of niobium oxide thin film with incidental light angle and applied
voltage. Thin Solid Films 603:180-186.
3. Potucek R K et al. (2006) Impedance characterization of anodic barrier Al Oxide film beneath porous oxide layer.
Journal of the Electrochemical Society 153(8):B304.
4. Richter F et al. (2001) Optical properties and mechanical stress in SiO
2
/Nb
2
O
5
multilayers. Thin Solid Films 389:278-
283.
5. Szymanowski H et al. (2005) Optical properties and microstructure of plasma deposited Ta
2
O
5
and Nb
2
O
5
films.
Journal of Vacuum Science & Technology A 23(2):241-247.
Biography
Michał Stępień graduated MSc from theAGH University of Science and Technology in 2010. He received his PhD degree in 2015 (Synthesis of oxides nanostructures
on the surface of selected transition metals) under the guidance of Professor Krzysztof Fitzner. His research interests are based on synthesis and surface
modification oxides nanotubes. Now he is a Research Worker in AGH in Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals.
mstepien@agh.edu.plMichał Stępień et al., Biosens J 2018, Volume 7
DOI: 10.4172/2090-4967-C1-003