FN ISI Export Format VR 1.0 PT J TI Self-Assembly of a Triphenylene-Based Electron Donor Molecule on Graphene AF La Rie, Joris de Enache, Mihaela Wang, Qiankun Lu, Wenbo Kivala, Milan Stöhr, Meike AU La Rie, J Enache, M Wang, Q Lu, W Kivala, M Stöhr, M SO The journal of physical chemistry. C, Nanomaterials and interfaces SN 1932-7447 VL 126 BP 9855 EP 9861 PY 2022 AB 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. ER