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We describe a fast and versatile method to functionalize high-quality graphene with organic molecules by exploiting the synergistic effect of supramolecular and covalent chemistry. With this goal, we designed and synthesized molecules comprising a long aliphatic chain and an aryl diazonium salt. Thanks to the long chain, these molecules physisorb from solution onto CVD graphene or bulk graphite, self-assembling in an ordered monolayer. The sample is successively transferred into an aqueous electrolyte, to block any reorganization or desorption of the monolayer. An electrochemical impulse is used to transform the diazonium group into a radical capable of grafting covalently to the substrate and transforming the physisorption into a covalent chemisorption. During covalent grafting in water, the molecules retain the ordered packing formed upon self-assembly. Our two-step approach is characterized by the …
American Chemical Society
Publication date: 
26 Jul 2016

Zhenyuan Xia, Francesca Leonardi, Marco Gobbi, Yi Liu, Vittorio Bellani, Andrea Liscio, Alessandro Kovtun, Rongjin Li, Xinliang Feng, Emanuele Orgiu, Paolo Samorì, Emanuele Treossi, Vincenzo Palermo

Biblio References: 
Volume: 10 Issue: 7 Pages: 7125-7134
ACS nano