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Covalent 2D Patterning, Local Electronic Structure and Polarization Switching of Graphene at the Nanometer Level
Author(s) -
Bao Lipiao,
Zhao Baolin,
Assebban Mhamed,
Halik Marcus,
Hauke Frank,
Hirsch Andreas
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202100941
Subject(s) - graphene , materials science , nanotechnology , graphene nanoribbons , surface modification , nanostructure , covalent bond , fluorine , polarization (electrochemistry) , chemical engineering , chemistry , organic chemistry , engineering , metallurgy
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.