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HL: Fachverband Halbleiterphysik

HL 25: C/diamond II

HL 25.1: Vortrag

Dienstag, 24. März 2009, 16:00–16:15, POT 51

Functionalizing graphene by embedded boron clusters — Alexander Quandt¹, Cem Özdogan², •Jens Kunstmann^3,4, and Holger Fehske¹ — ¹Institut für Physik der Universität Greifswald, Felix–Hausdorff-Str. 6, 17489 Greifswald, Germany — ²Department of Computer Engineering, Çankaya University, Balgat, 06530 Ankara, Turkey — ³Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart, Germany — ⁴Institute for Materials Science, Dresden University of Technology, 01062 Dresden, Germany

We present results from an ab initio study of B₇ clusters implanted into graphene [1,2]. Our model system consists of an alternating chain of quasiplanar B₇ clusters. We show that graphene easily accepts these alternating B₇-C₆ chains and that the implanted boron components may dramatically modify the electronic properties. This suggests that our model system might serve as a blueprint for the controlled layout of graphene based nanodevices, where the semiconducting properties are supplemented by parts of the graphene matrix itself, and the basic metallic wiring is provided by alternating chains of implanted boron clusters. [1] A. Quandt, C. Özdoğan, J. Kunstmann, and H. Fehske, Nanotechnology 19, 335707 (2008). [2] A. Quandt, C. Özdoğan, J. Kunstmann, and H. Fehske, phys. stat. solidi (b) 245, 2077 (2008).