Self-assembly of a triphenylene-based electron donor molecule on graphene: structural and electronic properties
In this study, we report on the self-assembly of the organic electron donor 2,3,6,7,10,11-hexamethoxytriphenylene (HAT) on graphene grown epitaxially on Ir(111). Using scanning tunneling microscopy and low-energy electron diffraction, we find that a monolayer of HAT assembles in a commensurate close...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
June 1, 2022
|
| In: |
The journal of physical chemistry. C, Energy, materials, and catalysis
Year: 2022, Volume: 126, Issue: 23, Pages: 9855-9861 |
| ISSN: | 1932-7455 |
| DOI: | 10.1021/acs.jpcc.1c10266 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acs.jpcc.1c10266
|
| Author Notes: | Joris de la Rie, Mihaela Enache, Qiankun Wang, Wenbo Lu, Milan Kivala, and Meike Stöhr |
| Summary: | In this study, we report on the self-assembly of the organic electron donor 2,3,6,7,10,11-hexamethoxytriphenylene (HAT) on graphene grown epitaxially on Ir(111). Using scanning tunneling microscopy and low-energy electron diffraction, we find that a monolayer of HAT assembles in a commensurate close-packed hexagonal network on graphene/Ir(111). X-ray and ultraviolet photoelectron spectroscopy measurements indicate that no charge transfer between the HAT molecules and the graphene/Ir(111) substrate takes place, while the work function decreases slightly. This demonstrates that the HAT/graphene interface is weakly interacting. The fact that the molecules nonetheless form a commensurate network deviates from what is established for adsorption of organic molecules on metallic substrates where commensurate overlayers are mainly observed for strongly interacting systems. |
|---|---|
| Item Description: | Gesehen am 26.07.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1932-7455 |
| DOI: | 10.1021/acs.jpcc.1c10266 |