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HL: Fachverband Halbleiterphysik

HL 28: Poster Session: Graphen; Transport properties; Transport in high magnetic fields / Quantum Hall effect; Metal-semiconductor hybrid systems

HL 28.1: Poster

Montag, 11. März 2013, 16:00–20:00, Poster A

Fabrication and characterization of free-standing graphene — •Dominique Schüpfer, Katharina Huhn, Torsten Henning, and Peter J. Klar — I. Physikalisches Institut, JLU, Heinrich-Buff-Ring 16, 35392 Gießen

Up to now no simple method for characterizing graphene without the influence of its supporting material has been established. We demonstrate a simple alternative for fabricating free-standing graphene using SU-8 resist as a supporting structure. The SU-8 resist is micro-structured via photolithography to prepare hollow cylinders inside the SU-8 layer. In a next step graphene can be deposited on top of this structure by mechanical exfoliation of graphite, which creates free-standing graphene on top of the hollow cylinders. Raman measurements of these graphene monolayers will be discussed aswell as the fabrication of this very suitable supporting structure.