Moiré lattice of twisted bilayer graphene as template for non-covalent functionalization
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929399472848896 |
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| author | Dierke, Tobias Wolff, Stefan Gillen, Roland Eisenkolb, Jasmin Nagel, Tamara Maier, Sabine Kivala, Milan Hauke, Frank Hirsch, Andreas Maultzsch, Janina |
| author_facet | Dierke, Tobias Wolff, Stefan Gillen, Roland Eisenkolb, Jasmin Nagel, Tamara Maier, Sabine Kivala, Milan Hauke, Frank Hirsch, Andreas Maultzsch, Janina |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_17573 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Moiré lattice of twisted bilayer graphene as template for non-covalent functionalization Dierke, Tobias Wolff, Stefan Gillen, Roland Eisenkolb, Jasmin Nagel, Tamara Maier, Sabine Kivala, Milan Hauke, Frank Hirsch, Andreas Maultzsch, Janina Materials Science 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. |
| title | Moiré lattice of twisted bilayer graphene as template for non-covalent functionalization |
| topic | Materials Science |
| url | https://arxiv.org/abs/2406.17573 |