Regensburg 2013 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 14: Functional Materials - Hydrogen

MM 14.10: Vortrag

Montag, 11. März 2013, 18:00–18:15, H26

Changes in the Electronic Structure of Deuterium Implanted Molybdenum and Rhodium — •Baran Eren, Laurent Marot, Marco Wisse, Roland Steiner, and Ernst Meyer — Klingelbergstrasse 82 4056 Basel Schweiz

In this presentation, two recent works of our group are going to be presented. In the first work molybdenum coatings and in the second work rhodium coatings were treated with low temperature deuterium plasma. Both are considered as candidates as light reflection components in the next generation fusion reactors, therefore changes in their electronic properties may be important for the optical diagnostic systems.

It is shown that hydrogen acts as an electron acceptor in molybdenum, but an electron donor in rhodium. Both cases are investigated with various experimental techniques including photoelectron spectroscopy, spectroscopic ellipsometry, spectroscopic reflectometry, spectrophotometry, specific resisvity and direct surface morphology imaging techniques. Rhodium/hydrogen system is not stable in air due to a catalytic reaction between hydrogen and oxygen, whereas molybdenum/hydrogen system is stable because hydrogen is strongly bound to defect sites.