Graphene on metal surfaces - binding, structure, and growth

CIC nanoGUNE Seminars

Speaker

J. Wintterlin, LMU München, Munich, Germany

When

2010/11/02
12:00

Place

nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian

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The special band structure of graphene gives rise to exotic electronic properties which makes this material interesting for applications, in particular in electronic devices. However, for practical applications new methods have to be developed that lead to high-quality graphene layers. One promising method is chemical vapor deposition (CVD) of hydrocarbons on metal surfaces, although the quality of the epitaxial graphene obtained is, at present, not as good as from the standard exfoliation technique. We have studied CVD-grown graphene on metals, in particular on Ru(0001), by using various surface science tools, scanning tunneling microscopy, photoelectron spectroscopy, electron and X-ray diffraction, and DFT calculations. Essential results are a surprisingly strong deformation of the adsorbed graphene layer and modifications of its electronic structure which result from complex interactions with the metal support. Time-resolved experiments provide information about the epitaxial growth.