Regensburg 2019 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 25: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...) Part II
DS 25.11: Vortrag
Freitag, 5. April 2019, 12:15–12:30, H32
Structure evolution of hydrogenated TiO2 by means of Perturbed Angular Correlation — •Dmitry Zyabkin1, Juliana Schell2,3, Ulrich Vetter1, and Peter Schaaf1 — 1Chair materials for Electronics, Institute of Materials Engineering and Institute of Micro- and Nanotechnologies MacroNano®, Gustav-Kirchhoff-Str. 5, 98693 Ilmenau, Germany — 2European Organization for Nuclear Research (CERN), CH- 1211 Geneva, Switzerland — 3Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
Hydrogenated titania has been recently attracting plenty of attention due to its promising properties. Not quite long ago some results proved that H is able to create a bond with Ti via Ti-OH and stays connected up to 530-550 K when it starts to dissociate and leave, additionally V0 start to rearrange. To study this phenomena we applied recent perturbed γγ-angular correlation (PAC) studies of TiO2:H thin films using the probe 111mCd, which was implanted at the online isotope separator ISOLDE at CERN. The films were produced by reactive magnetron sputtering on Si substrates. The subsequent H2 plasma treatment was performed at various temperatures up to 663K. After implantation with 1011 probe atoms the samples were transported to a PAC setup and measured in various atmospheres (O2, air and vacuum) and in a range of temperatures to follow structure refinement. In order to preserve H-boundings no after implantation annealing was done. Time-differential R(t) spectra were fitted against electric quadrupole interaction parameter sets corresponding to fractions of probes.