Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene
The non-covalent functionalisation of graphene is an attractive strategy to alter the surface chemistry of graphene without damaging its superior electrical and mechanical properties. Using the facile method of aqueous-phase functionalisation on large-scale CVD-grown graphene, we investigated the fo...
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| Veröffentlicht in: | Nanoscale 2015-10, Vol.7 (39), p.16337-16342 |
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| container_title | Nanoscale |
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| creator | Berner, Nina C Winters, Sinéad Backes, Claudia Yim, Chanyoung Dümbgen, Kim C Kaminska, Izabela Mackowski, Sebastian Cafolla, Attilio A Hirsch, Andreas Duesberg, Georg S |
| description | The non-covalent functionalisation of graphene is an attractive strategy to alter the surface chemistry of graphene without damaging its superior electrical and mechanical properties. Using the facile method of aqueous-phase functionalisation on large-scale CVD-grown graphene, we investigated the formation of different packing densities in self-assembled monolayers (SAMs) of perylene bisimide derivatives and related this to the amount of substrate contamination. We were able to directly observe wet-chemically deposited SAMs in scanning tunnelling microscopy (STM) on transferred CVD graphene and revealed that the densely packed perylene ad-layers adsorb with the conjugated π-system of the core perpendicular to the graphene substrate. This elucidation of the non-covalent functionalisation of graphene has major implications on controlling its surface chemistry and opens new pathways for adaptable functionalisation in ambient conditions and on the large scale. |
| doi_str_mv | 10.1039/c5nr04772b |
| format | Article |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Deposition Derivatives Graphene Optimization Packing density Scanning tunneling microscopy Strategy Surface chemistry |
| title | Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene |
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