Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 70: Structural Dynamics in Nanoscale Materials Probed by Ultrashort Electron Pulses

O 70.3: Poster

Mittwoch, 18. März 2015, 18:15–21:00, Poster A

Laser-induced heating of nano-crystalline graphene monitored by Ultrafast Electron Diffraction — •Silvio Morgenstern, Christian Gerbig, Marlene Adrian, Xaver Holzapfel, Arne Senftleben, Matthias Wollenhaupt, and Thomas Baumert — Universität Kassel, Institut für Physik and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), D - 34132 Kassel, Germany

Ultrafast Electron Diffraction (UED) has lately become one of the most promising techniques to directly provide insights into fundamental dynamics in solids at the microscopic level and on the pico- to subpicosecond timescale [1,2]. In this contribution we present our UED setup to reach a high spatial and temporal resolution below 200 fs [3]. Additionally we present first results of time-resolved diffraction experiments on nano-crystalline graphene (NC graphen) [4] and discuss the possibility of time-resolved observations of out-of-plane dynamics in such materials [5]. Finally we compare our results to results from CVD graphene [6].

[1] A. H. Zewail, J. Phys. Chem. 98, 2782-2796 (1994), [2] B. Siwick & D. Miller, Science 302, (5649), 1382-1385 (2003), [3] C. T. Hebeisen, Opt. Letters Vol. 31, No. 23, 3571 (2006) [4] A. Truchanin, ACS Nano Vol. 5, No. 5, 3896 (2011), [5] J. C. Meyer, Nature 446, 60-63 (2007), [6] M. Schäfer, New J. Phys. 13, 063030 (2011)