Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 111: Nanostructured Surfaces and Thin Films II: 1D and 2D Systems (joint session O/CPP)
O 111.5: Talk
Thursday, March 19, 2020, 16:00–16:15, WIL B321
Length dependent symmetry in narrow chevron-like graphene nanoribbons — •Koen Houtsma1, Mihaela Enache1, Remco Havenith1,2, and Meike Stöhr1 — 1Zernike Institute for Advanced Materials, University of Groningen, Groningen, the Netherlands — 2Stratingh Institute for Chemistry, University of Groningen, Groningen, the Netherlands
Graphene nanoribbons (GNRs) are an exciting material that has aroused much interest due to their excellent and tunable electronic properties. Using on-surface synthesis, narrow chevron-like GNRs, which host a mixture of armchair and zigzag edge terminations, were synthesized from the prochiral molecular building block 6,12-dibromochrysene on a Au(111) substrate [1]. An interesting property of these ribbons is the changing structural symmetry depending on the number of monomer units incorporated in the ribbon, where ribbons consisting of an odd and even number of monomers are point and mirror symmetric, respectively. In our research, we characterized the electronic properties of these GNRs using scanning tunneling spectroscopy, also in dependence of their length and parity.
[1] T.A. Pham et al., Small 13 (2017) 1603675.