Kovalente 2D‐Strukturierung von Graphen durch räumlich aufgelöstes Laserschreiben/Lesen/Löschen

The sequential vertical polyfunctionalization of 2D addend‐patterned graphene is still elusive. Here, we report a practical realization of this goal via a “molecular building blocks” approach, which is based on a combination of a lithography‐assisted reductive functionalization approach and a post‐functionalization step to sequentially and controllably link the molecular building blocks ethylpyridine, cis‐dichlorobis(2,2′‐bipyridyl)ruthenium, and triphenylphosphine (4‐methylbenzenethiol, respectively) on selected lattice regions of a graphene matrix. The assembled 2D hetero‐architectures are unambiguously characterized by various spectroscopic and microscopic measurements, revealing the stepwise stacking of the molecular building blocks on the graphene surface. Our method overcomes the current limitation of a one‐layer‐only binding to the graphene surface and opens the door for a vertical growth in the z‐direction.

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Molecular Stacking on Graphene

Wei

Liu

Kohring

et al. 2022

Angewandte Chemie

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Molecular Stacking on Graphene

et al. 2022

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

Bao

Zhao

Assebban

et al. 2021

Chemistry A European J

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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.

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Kovalente 2D‐Strukturierung von Graphen durch räumlich aufgelöstes Laserschreiben/Lesen/Löschen

Cited by 3 publications

References 40 publications

Molecular Stacking on Graphene

Molecular Stacking on Graphene

Molecular Stacking on Graphene

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

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