Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 56: Nanostructures: Dots, Particles and Clusters
O 56.4: Talk
Wednesday, March 9, 2016, 11:15–11:30, H4
Towards the geometrical structure of small, deposited Au nanoclusters using grazing incidence X-ray scattering — •Deniza Chekrygina1, Matthias Schwartzkopf2, Bjoern Beyersdorff2, André Rothkirch2, Ivan Baev1, Torben Beeck1, Fridtjof Kielgast1, Stephan Klumpp1, Jan-Hendrik Ruescher1, Stephan Roth2, Wilfried Wurth1,2, and Michael Martins1 — 1Physik Department, Universität Hamburg — 2DESY Photon Science, Hamburg
Mass-selected gold clusters deposited on a surface consisting of only a few atoms are of great interest due to their quantum size effects [J.Phys.Chem A, 103,9573 (1999)]. The geometrical structure of these objects is still not determined for most cases and the existing theoretical models are contradictory [Phys.Rev.B 67,085404(2003);Str.Chem., V16,N4(2005)]. In our work we investigate the geometrical structure of size-selected Au9 clusters deposited on a silicon substrate prepared under different soft-landing conditions. The clusters were capped with a thin Al film to suppress oxidation. Due to the very small size of our clusters we follow a new path for structural analysis. We compare differently prepared samples and present first results obtained using a combination of several complimentary methods performed in parallel: Grazing-incidence small- and wide-angle X-ray scattering (GISAXS and GIWAXS) and X-ray fluorescence (XRF).