Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 65: Graphene V

O 65.10: Vortrag

Donnerstag, 29. März 2012, 12:45–13:00, MA 041

Layer-by-layer engineering of novel 2D carbon materials with tunable optical, chemical and electrical properties — •Andrey Turchanin¹, Christoph Nottbohm¹, André Beyer¹, Rainer Stosch², and Armin Gölzhäuser¹ — ¹Physik supramolekularer Systeme und Oberflächen, Universität Bielefeld — ²Physikalisch-Technische Bundesanstalt, Braunschweig

We present a route to the fabrication of novel layered 2D carbon materials with tunable electrical, optical and chemical properties on various substrates and as suspended membranes [1]. These materials are engineered via simple layer-by-layer mechanical stacking of carbon (organic) nanomembranes with a thickness of about 1 nm. We characterize physical and chemical properties of these materials via optical microscopy, UV/Vis reflection spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and electrical measurements. Vacuum annealing of the multilayer stacks results in their conversion into graphene at temperatures above 800 K. The degree of this conversion and the thickness of the resulting layers can be precisely controlled. The suggested route opens broad avenues to the engineering of novel 2D carbon hybrid materials for applications ranging from electronics to biophysics.

[1] C.T. Nottbohm et al., Small 7, 874 (2011)