Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.117: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

Growth and Chemical Modification of Graphene on Ni(111) — •Wei Zhao, Oliver Höfert, Christian Papp, and Hans-Peter Steinrück — Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen

The outstanding electronic properties of graphene make it a promising candidate for future spintronic applications in electronic devices and setups as well as gas sensors. Therefore, we first studied the growth of graphene on Ni (111) under different temperatures (773-950 K) and with different carbon sources such as ethylene and propylene, by in situ X-ray photoelectron spectroscopy (XPS). After cooling to room temperature, a second contribution showed up in C 1s region of graphene on Ni (111), enabling a better understanding of the structure of graphene on this surface.

For potential use in chemical gas sensors, functionalized graphene needs to be. Doping with hetero atoms like N might be one way to introduce sensitivity towards different gases. Our approach to achieve what gentle sputtering chemical modification of the graphene sheets on Ni (111) with molecular nitrogen. To reveal changes in chemical properties due to the sputtering process, we used benzene as probe molecule and studied its interaction with pristine and modified graphene layers by XPS and TPD.

This work was supported by BMBF (05 ES3XBA / 5) and the DFG through the Cluster of Excellence”Engineering of Advanced Materials”.