Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 51: Focus Session: Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation II
O 51.7: Vortrag
Mittwoch, 20. März 2024, 16:45–17:00, HE 101
On-Surface Synthesis of Edge-Extended Zigzag Graphene Nanoribbons — •Amogh Kinikar1, Feifei Xiang1, Xiushang Xu2, Yanwei Gu3, Akimitsu Narita2, Klaus Müllen2, Carlo Pignedoli1, Oliver Gröning1, Pascal Ruffieux1, and Roman Fasel1 — 1Empa, Dübendorf 8600 Switzerland — 2OIST Graduate University, Okinawa 904-0495, Japan — 3MPI-P, 55128 Mainz, Germany
Graphene nanoribbons (GNRs) have gained significant attention in nanoelectronics due to their potential for precise tuning of electronic properties through variations in edge structure and ribbon width. However, the synthesis of GNRs with highly sought-after zigzag edges (ZGNRs) remains challenging. Here, we present a design motif for synthesizing novel edge-extended ZGNRs. This motif enables the controlled incorporation of edge extensions along the zigzag edges at regular intervals, opening up possibilities for synthesizing a diverse range of edge-extended ZGNRs. Examples of successfully synthesized structures are presented, characterized using Scanning Tunneling Microscopy, and complemented by Density Functional Theory calculations. These efforts elucidate the electronic and magnetic properties of these edge-extended ZGNRs. The diverse range of edge-extended ZGNRs now possible expands the structural landscape of GNRs and facilitates the exploration of their structure-dependent electronic properties.
[1] Kinikar, A. et al. "On-surface Synthesis of Edge-Extended Zigzag Graphene Nanoribbons." Advanced Materials (2023) 35, 2306311.
Keywords: Graphene nanoribbons; electronic properties; STM