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Hydrogen Charging Effects in Pd/Ti/TiO2/Ti Thin Films Deposited on Si(111) Studied by Ion Beam Analysis Methods

Drogowska, K. and Flege, Stefan and Schmitt, C. and Rogalla, D. and Becker, H.-W. and Nhu-Tarnawska, H. K. N. and Brudnik, A. and Tarnawski, Z. and Zakrzewska, K. and Marszalek, M. and Balogh, A. G. (2012):
Hydrogen Charging Effects in Pd/Ti/TiO2/Ti Thin Films Deposited on Si(111) Studied by Ion Beam Analysis Methods.
In: Advances in Materials Science and Engineering, Hindawi Publishing Corporation, pp. 269603-1-269603-8, 2012, [Online-Edition: http://www.hindawi.com/journals/amse/2012/269603/],
[Article]

Abstract

Titanium and titanium dioxide thin films were deposited onto Si(111) substrates by magnetron sputtering from ametallic Ti target in a reactive Ar+O2 atmosphere, the composition of which was controlled by precision gas controllers. For some samples, 1/3 of the surface was covered with palladium using molecular beam epitaxy. Chemical composition, density, and layer thickness of the layers were determined by Auger electron spectroscopy (AES) and Rutherford backscattering spectrometry (RBS). The surface morphology was studied using high-resolution scanning electron microscopy (HRSEM). After deposition, smooth, homogenous sample surfaces were observed. Hydrogen charging for 5 hours under pressure of 1 bar and at temperature of 300◦C results in granulation of the surface. Hydrogen depth profile was determined using secondary ion mass spectrometry (SIMS) and nuclear Reaction Analysis (N-15 method), using a 15N beam at and above the resonance energy of 6.417 MeV. NRA measurements proved a higher hydrogen concentration in samples with partially covered top layers, than in samples without palladium. The highest value of H concentration after charging was about 50% (in the palladium-covered part) and about 40% in titanium that was not covered by Pd. These values are in good agreement with the results of SIMS measurements.

Item Type: Article
Erschienen: 2012
Creators: Drogowska, K. and Flege, Stefan and Schmitt, C. and Rogalla, D. and Becker, H.-W. and Nhu-Tarnawska, H. K. N. and Brudnik, A. and Tarnawski, Z. and Zakrzewska, K. and Marszalek, M. and Balogh, A. G.
Title: Hydrogen Charging Effects in Pd/Ti/TiO2/Ti Thin Films Deposited on Si(111) Studied by Ion Beam Analysis Methods
Language: English
Abstract:

Titanium and titanium dioxide thin films were deposited onto Si(111) substrates by magnetron sputtering from ametallic Ti target in a reactive Ar+O2 atmosphere, the composition of which was controlled by precision gas controllers. For some samples, 1/3 of the surface was covered with palladium using molecular beam epitaxy. Chemical composition, density, and layer thickness of the layers were determined by Auger electron spectroscopy (AES) and Rutherford backscattering spectrometry (RBS). The surface morphology was studied using high-resolution scanning electron microscopy (HRSEM). After deposition, smooth, homogenous sample surfaces were observed. Hydrogen charging for 5 hours under pressure of 1 bar and at temperature of 300◦C results in granulation of the surface. Hydrogen depth profile was determined using secondary ion mass spectrometry (SIMS) and nuclear Reaction Analysis (N-15 method), using a 15N beam at and above the resonance energy of 6.417 MeV. NRA measurements proved a higher hydrogen concentration in samples with partially covered top layers, than in samples without palladium. The highest value of H concentration after charging was about 50% (in the palladium-covered part) and about 40% in titanium that was not covered by Pd. These values are in good agreement with the results of SIMS measurements.

Journal or Publication Title: Advances in Materials Science and Engineering
Volume: 2012
Publisher: Hindawi Publishing Corporation
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Dec 2011 12:45
Official URL: http://www.hindawi.com/journals/amse/2012/269603/
Funders: This work was supported by MPD Programme “Krakow Interdisciplinary PhD-Project in Nanoscience and Advanced Nanostructures” operated within the Foundation for Polish Science and cofinanced by the EU European Regional Development Fund.
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