Journal article 181 views 22 downloads
Moiré Lattice of Twisted Bilayer Graphene as Template for Non‐Covalent Functionalization
,
Stefan Wolff ,
Roland Gillen ,
Jasmin Eisenkolb ,
Tamara Nagel ,
Sabine Maier ,
Milan Kivala ,
Frank Hauke ,
Andreas Hirsch ,
Janina Maultzsch
Angewandte Chemie, Volume: 137, Issue: 2
Swansea University Author:
Roland Gillen
-
PDF | Version of Record
© 2024 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License.
Download (3.64MB)
DOI (Published version): 10.1002/ange.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) molecule...
| Published in: | Angewandte Chemie |
|---|---|
| ISSN: | 0044-8249 1521-3757 |
| Published: |
Wiley
2025
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa70453 |
| 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. |
|---|---|
| Keywords: |
2D materials; Density functional calculations; Functionalization; Graphene; Raman spectroscopy |
| College: |
Faculty of Science and Engineering |
| Funders: |
Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation. Grant Numbers: 447264071, 182849149, 440719683. |
| Issue: |
2 |