Electrochemical Functionalization of Graphene at the Nanoscale with Self-Assembling Diazonium Salts

XIA, Zhenyuan, LEONARDI, Francesca, GOBBI, Marco, LIU, Yi, BELLANI, Vittorio, LISCIO, Andrea, KOVTUN, Alessandro, LI, Rongjin, FENG, Xinliang, ORGIU, Emanuele, SAMORÌ, Paolo, TREOSSI, Emanuele et PALERMO, Vincenzo, 2016. Electrochemical Functionalization of Graphene at the Nanoscale with Self-Assembling Diazonium Salts. ACS Nano. 14 juin 2016. Vol. 10, n° 7pp. 7125-7134. DOI 10.1021/acsnano.6b03278.
Accès libre Peer reviewed
Version acceptée pour publication (post-print auteur)
Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Auteurs 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
Langue

en
Volume

10
Numéro

7
Page de début

7125
Page de fin

7134
Date de première publication

2016-06-14
ISSN

1936-0851
1936-086X
Titre de la source (revue, livre…)

ACS Nano
Résumé

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
Show moreWe 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 independent control over the processes of immobilization of molecules on the substrate and their covalent tethering, enabling fast (t < 10 s) covalent functionalization of graphene. This strategy is highly versatile and works with many carbon-based materials including graphene deposited on silicon, plastic, and quartz as well as highly oriented pyrolytic graphite.
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DOI 10.1021/acsnano.6b03278
Titre abrégé de la source

ACS Nano
Type de publication

ACL
Domaine

Chimie/Matériaux
Audience

International