Bao Lipiao, Zhao Baolin, Assebban Mhamed, Halik Marcus, Hauke Frank, Hirsch Andreas
Department of Chemistry and Pharmacy & Joint Institute of Advanced Materials and Processes (ZMP), Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany.
Organic Materials and Devices (OMD), Institute of Polymer Material, Interdisziplinären Zentrums für Nanostrukturierte Filme (IZNF), Friedrich-Alexander University of Erlangen-Nürnberg, Cauerstraße 3, 91058, Erlangen, Germany.
Chemistry. 2021 Jun 16;27(34):8709-8713. doi: 10.1002/chem.202100941. Epub 2021 May 1.
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.
报道了一种用于石墨烯共价图案化和性能调控的非常简便高效的方法。在涂覆有1-氟-3,3-二甲基苯并碘恶唑的石墨烯上，通过激光写入将高活性氟自由基添加到石墨烯的受限区域。该过程能够在石墨烯上实现分辨率低至200 nm的精美图案。通过控制激光照射时间，可以精确调节官能化程度，范围从未官能化的石墨烯到极高官能化的石墨烯。随后对最初图案化的氟原子进行取代，得到了前所未有的带有噻吩基团的石墨烯纳米结构。这种取代导致了图案化石墨烯区域内电子结构和极化的完全转变。该方法为精确调控纳米结构石墨烯的结构和性能铺平了道路。
