Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 31: Poster Session II
DS 31.17: Poster
Donnerstag, 15. März 2018, 11:15–13:15, Poster F
Perturbed angular correlation studies of H2 plasma treated rutile — •Dmitry Zyabkin1, Juliana Schell2, Ulrich Vetter1, Robinson Santos3, 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 — 3Instituto de Pesquisas Energéticas e Nucleares, IPEN, Saõ Paulo, Brazil
Hydrogenated titania has recently attracted enormous attention due to its compelling features and extended application [1]. Nonetheless, the origin of the improved features has stayed uncertain as well as H2 stability under elevated temperatures. We report on recent perturbed γγ-angular correlation (PAC) studies of TiO2:H rutile thin films using the probe 111mCd, which was implanted at the online isotope separator ISOLDE at CERN. The films were synthesized by reactive magnetron sputtering and deposited on Si and quartz substrates, followed by an annealing step at 1173K for 5 hours. The subsequent H2 plasma treatment was performed at various plasma temperatures up to 663K. After implantation with typically around 1012 probe atoms the samples were transported to the PAC setup and kept at 481K, 531K or 581K during the measurements in vacuum. Time-correlated R(t) spectra were fitted against electric quadrupole interaction parameter sets corresponding to fractions of probe atoms in specific local defect configurations.
X.Chen et al. Chem. Soc. Rev., 2015,44, 1861-1885