Berlin 2015 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 17: Postersession I

MM 17.5: Poster

Monday, March 16, 2015, 18:00–20:00, Poster E

Hydrogenography-Study of thin Vanadium-Hydrogen films — •Anshu Tyagi, Jantje Schommartz, and Astrid Pundt — Universität Göttingen, Institut für Materialphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

In this work, thin Vanadium films of 10 nm - 30 nm thickness, sputter deposited on transparent Glass substrates are examined. These samples are electrochemically loaded with hydrogen while simultaneous measurements of the transmission and reflection are done with a Light microscope. Electrochemical hydrogenography offers the possibility to study the local and the global hydrogen concentration within a defined area of the film and hence gives information on the lateral hydrogen distribution on a micrometer scale. Also the role of nucleation and growth in the hydrogenation of films is analyzed by using a mask technique during film deposition. In-situ Scanning Probe Microscopy studies are additionally performed. The role of the local detachment on the local hydride nucleation is examined by repeated loading experiments.
[1] J. Kürschner, S. Wagner, A. Pundt, Journal of Alloys and Compounds 593 (2014) 87-92. [2] L. Mooij, B. Dam, Phys. Chem. Chem. Phys. 15 (2012) 2782-2792. [3] J.L. Schommartz, Bachelor Thesis, University of Göttingen, (2014).

Financial support by the DFG via DFG-PU131/9-1 is gratefully acknowledged.