Wei Tao, Al-Fogra Sabrin, 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, Erlangen 91058, Germany.
J Am Chem Soc. 2020 Dec 30;142(52):21926-21931. doi: 10.1021/jacs.0c11153. Epub 2020 Dec 18.
Laser writing as a simple and straightforward method for covalent 2D patterning of graphene remains challenging. Here, we report a facile and efficient approach for a laser-induced 2D patterning of graphene utilizing silver trifluoroacetate, providing an unprecedented high degree of functionalization. The use of laser-triggered photolysis of silver trifluoroacetate to generate trifluoromethyl radicals, confined only to the laser-irradiated region, leads to the selective reaction of graphene, thereby completing direct laser writing on graphene toward a spatially resolved 2D-patterned architecture. This highly 2D-functionalized graphene is completely reversible. Furthermore, a more complex patterned graphene hybrid architecture was constructed, taking advantage of the simultaneously produced/patterned silver nanoparticles during the laser-writing process. Considering the simplicity of this approach and its ability to provide high degrees of functionalization, the prerequisite of 2D patterning of other 2D materials based on this method is provided.
激光写入作为一种用于石墨烯共价二维图案化的简单直接方法，仍然具有挑战性。在此，我们报告了一种利用三氟乙酸银实现激光诱导石墨烯二维图案化的简便高效方法，提供了前所未有的高功能化程度。利用激光引发三氟乙酸银的光解以产生仅局限于激光照射区域的三氟甲基自由基，导致石墨烯的选择性反应，从而完成对石墨烯的直接激光写入，形成空间分辨的二维图案化结构。这种高度二维功能化的石墨烯是完全可逆的。此外，利用激光写入过程中同时产生/图案化的银纳米颗粒，构建了更复杂的图案化石墨烯杂化结构。考虑到该方法的简单性及其提供高功能化程度的能力，为基于此方法对其他二维材料进行二维图案化提供了前提条件。
