Dresden 2017 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 14: Poster: Two-Dimenaional Materials and Topological Insulators
HL 14.4: Poster
Monday, March 20, 2017, 14:00–18:00, P2-OG3
Charge transport in bottom-up synthesized graphene nanoribbon networks — •Nils Richter1,2, Zongping Chen3, Akimitsu Narita3, Xinliang Feng4, Mathias Kläui1,2, and Klaus Müllen2,3,5 — 1Institut für Physik, Johannes Gutenberg Universität, Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, Mainz, Germany — 3Max Planck Institute for Polymer Research, Mainz, Germany — 4Center for Advancing Electronics Dresden & Department of Chemistry and Food Chemistry, Technische Universität, Dresden, Germany — 5Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Mainz, Germany
Graphene nanoribbons (GNRs) attract particular attention due to physical phenomena resulting from their geometrical confinement. GNRs with atomically perfect edge structures are synthesized on gold surfaces and transferred to insulating substrates [1, 2]. We determine the conductivity and mobility of chevron edged GNRs with a width of 9 carbon atoms (N=9) using GNR-FET devices. At room temperature the resistivity of such devices lies in the regime of approximately 1 GOhm and the mobility is in the order of 10−4 cm2/Vs. We compare chevron GNRs and armchair GNRs with N=9 to demonstrate the influence of the edge structure. Secondly, armchair GNRs with N=7 and N=9 are studied to test for the influence of the ribbon width. Temperature dependent measurements reveal details of their band gaps [3]. [1] A. Narita et al., Nature Chem. 6, 126 (2014). [2] Z. Chen et al., J. Am. Chem. Soc. in press (2016). [3] N. Richter et al., (manuscript in preparation 2016).