Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)

CPP 6.25: Poster

Montag, 26. März 2012, 17:30–19:30, Poster A

Structure and properties of reduced graphene oxide — •Michael Enzelberger¹, Siegfried Eigler², Philipp Hofmann¹, Christoph Dotzer², Andreas Hirsch², and Paul Müller¹ — ¹Department of Physics and Interdisciplinary Center of Molecular Materials, Universität Erlangen-Nürnberg, Germany — ²Department of Chemistry and Pharmacy, Universität Erlangen-Nürnberg and Institute of Advanced Materials and Processes (ZMP), Germany

Reducing graphene oxide is an economic method for the large scale production of graphene. However, the reduction process causes a large number of defects. During thermal annealing of graphene oxide, CO₂ becomes mobile at around 50^∘C and a CO₂ intercalated compound is formed. This intermediate decomposes by the release of water and CO₂ at around 150^∘C as shown by thermogravimetric analysis and mass spectroscopy. Single flakes as well as sheets of flakes of the reduced graphene oxide were investigated. We characterize the quality of the samples by combining Raman spectroscopy and Hall mobility measurements. For high quality samples we find a Raman D/G ratio of 3 and Hall mobilities exceeding 10 Vs/cm².