Moiré Lattice of Twisted Bilayer Graphene as Template for Non‐Covalent Functionalization

Dierke T, Wolff S, Gillen R, Eisenkolb J, Nagel T, Maier S, Kivala M, Hauke F, Hirsch A, Maultzsch J (2024)


Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 64

Issue: 2

DOI: 10.1002/anie.202414593

Abstract

We present a novel approach to achieve spatial variations in the degree of non-covalent functionalization of twisted bilayer graphene (tBLG). The tBLG with twist angles varying between ~5° and 7° was non-covalently functionalized with 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HATCN) molecules. Our results show a correlation between the degree of functionalization and the twist angle of tBLG. This correlation was determined through Raman spectroscopy, where areas with larger twist angles exhibited a lower HATCN peak intensity compared to areas with smaller twist angles. We suggest that the HATCN adsorption follows the moiré pattern of tBLG by avoiding AA-stacked areas and attach predominantly to areas with a local AB-stacking order of tBLG, forming an overall ABA-stacking configuration. This is supported by density functional theory (DFT) calculations. Our work highlights the role of the moiré lattice in controlling the non-covalent functionalization of tBLG. Our approach can be generalized for designing nanoscale patterns on two-dimensional (2D) materials using moiré structures as a template. This could facilitate the fabrication of nanoscale devices with locally controlled varying chemical functionality.

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APA:

Dierke, T., Wolff, S., Gillen, R., Eisenkolb, J., Nagel, T., Maier, S.,... Maultzsch, J. (2024). Moiré Lattice of Twisted Bilayer Graphene as Template for Non‐Covalent Functionalization. Angewandte Chemie International Edition, 64. https://doi.org/10.1002/anie.202414593

MLA:

Dierke, Tobias, et al. "Moiré Lattice of Twisted Bilayer Graphene as Template for Non‐Covalent Functionalization." Angewandte Chemie International Edition 64 (2024).

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