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Issue 39, 2015
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Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene

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Abstract

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.

Graphical abstract: Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene

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Supplementary files

Article information


Submitted
16 Jul 2015
Accepted
06 Sep 2015
First published
11 Sep 2015

Nanoscale, 2015,7, 16337-16342
Article type
Paper
Author version available

Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene

N. C. Berner, S. Winters, C. Backes, C. Yim, K. C. Dümbgen, I. Kaminska, S. Mackowski, A. A. Cafolla, A. Hirsch and G. S. Duesberg, Nanoscale, 2015, 7, 16337
DOI: 10.1039/C5NR04772B

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