Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 12: Nanostructures at Surfaces I
O 12.8: Talk
Monday, March 17, 2025, 16:45–17:00, H6
Intercalation of graphene nanoribbons — •Lüthi Dominik1, Lin Yang2, Ji Ma2, Akimitsu Narita3, 4, Xinliang Feng2, Klaus Müllen3, Pascal Ruffieux1, Roman Fasel1, and Gabriela Borin Barin1 — 1Empa, Ueberlandstrasse 129, 8600 Dübendorf, Switzerland — 2Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany — 3Max Plank Institute for Polymer Research, 55128 Mainz, Germany — 4Okinawa Institute of Science and Technology, Okinawa 904-0495, Japan
Atomically precise graphene nanoribbons (GNRs) exhibit unique properties due to electron confinement and tunable band gaps, making them ideal for applications ranging from transistors to spintronics. Precise fabrication is critical, and on-surface synthesis enables the creation of various GNR types with tailored edge topologies, giving rise to intriguing properties such as spin-polarized edges and topological quantum states.
For device integration, GNRs must be transferred from metallic to insulating substrates. However, the high chemical reactivity of zigzag edges has hindered studies of their transport properties. To address this, we explore intercalation to decouple GNRs from metallic substrates, enabling dry-transfer in ultra-high vacuum. This preserves intrinsic properties and facilitates integration into device architectures.
We investigate intercalation with transition metal halides, providing a platform to study interactions with magnetic layers, combining decoupling benefits with potential applications in quantum technologies.
Keywords: graphene nanoribbons; scanning tunneling microscopy; device integration; intercalation