Covalent 2D Patterning, Local Electronic Structure and Polarization Switching of Graphene at the Nanometer Level

Language
en
Document Type
Article
Issue Date
2021-06-16
First published
2021-05-01
Issue Year
2021
Authors
Bao, Lipiao
Zhao, Baolin
Assebban, Mhamed
Halik, Marcus
Hauke, Frank
Hirsch, Andreas
Editor
Publisher
Wiley-VCH GmbH
Abstract

Abstract A very facile and efficient protocol for the covalent patterning and properties tuning of graphene is reported. Highly reactive fluorine radicals were added to confined regions of graphene directed by laser writing on graphene coated with 1‐fluoro‐3,3‐dimethylbenziodoxole. This process allows for the realization of exquisite patterns on graphene with resolutions down to 200 nm. The degree of functionalization, ranging from the unfunctionalized graphene to extremely high functionalized graphene, can be precisely tuned by controlling the laser irradiation time. Subsequent substitution of the initially patterned fluorine atoms afforded an unprecedented graphene nanostructure bearing thiophene groups. This substitution led to a complete switch of both the electronic structure and the polarization within the patterned graphene regions. This approach paves the way towards the precise modulation of the structure and properties of nanostructured graphene.

Journal Title
Chemistry – A European Journal
Citation
Chemistry - A European Journal (2021). <https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202100941>
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