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O: Fachverband Oberflächenphysik
O 66: Poster Session V: 2D Materials: Electronic structure, excitations, etc. I
O 66.14: Poster
Wednesday, March 3, 2021, 10:30–12:30, P
Tailoring the electronic anisotropy of nanoporous graphene — •Xabier D. de Cerio1 and Aran Garcia-Lekue1,2 — 1Donostia International Physics Center (DIPC), San Sebastian, Spain — 2Ikerbasque, Basque Foundation for Science, Bilbao, Spain
Recent experimental advances have allowed the synthesis of atomically precise nanoporous graphene (NPG) through the lateral fusion of graphene nanoribbons (GNRs). Besides being a semiconductor, this novel 2D material exhibits a highly anisotropic electronic structure, which makes it appealing for electronic, optical, and sensing applications, and has thus generated great interest [Science 360, 199 (2018); Nano Lett. 19, 576 (2019); J. Am. Chem. Soc. 141, 13081 (2019)]. In this work, by means of Density Functional Theory (DFT) calculations, we determine the electronic anisotropy of a new family of NPG, in which atomic scale modification of lateral linkers leads to three different inter-ribbon coupling configurations. Our calculations predict different anisotropic behaviour for each coupling configuration. Additionally, we find that the rotation angle of phenyl rings in the linkers works as a continuos knob to manipulate the electronic crosstalk between adjacent GNRs. Supported by on-surface synthesis of this new nanostructure, we present a proof-of-concept study showing that engineering the linkers is an efficient way to tune the electronic anisotropy of NPG.