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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Thursday, 11 May 2017
(at 13:00 in room 115, Hallwachsstr. 3)
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Functionalization of epitaxially grown graphene nanostructures

Prof. Christoph Tegenkamp

Leibniz University of Hannover

Functionalization of graphene is an essential task for any future carbon based electronics. In this respect graphene ribbons grown on pre-structured SiC(0001) surfaces are interesting as they exhibit promising transport properties. Graphene ribbons grown on pre-structured SiC(0001) surfaces exhibit promising transport properties, e.g. high temperature annealing of appropriately designed SiC-Mesa structures results in growth of sidewall nanoribbons revealing robust ballistic transport channels with mean free path lengths up to 16µm at 300K. The existence of edge states on zig-zag oriented ribbons is confirmed by Raman, STM and STS measurements. Moreover, we have recently fabricated nano-constrictions within these wires revealing Fabry-Perot like resonance features.

Brief Bio:

Christoph Tegenkamp works in the field of transport phenomena and collective excitations in correlated matter and nanoscaled structures on surface and is currently holder of a professorship for nano-electromechanical quantum systems at the Leibniz University of Hannover.
He received his PhD in 2000 where he dealt with functionalization of surfaces due adsorption of organic molecules on epitaxially grown insulating films. After his Post-Doc time at the University of Maryland he returned to Hannover, where he introduced novel concepts of nanostructuring to surfaces. The combination of both top-down and bottom-up techniques is used to fabricate metallic nanostructures with atomic precision and intriguing transport properties.
Among other systems he works currently on of atomic wires grown by self-assembly on semiconducting surfaces, graphene nanostructures and topological insulators. Besides fundamental aspects, e.g spin-orbit coupling in correlated materials, application-driven and interdisciplinary topics, e.g. molecular electronics, belong to his interests.
Christoph Tegenkamp is in the editorial board of JPCM and member in various scientific panels.

Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.10.21 Thu
author: webadmin