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

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 |
Unité de recherche du site |
Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006 ICube - Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie - ICube - UMR7357 |
Langue |
en |
Volume |
10 |
Numéro |
7 |
Page de début |
7125 |
Page de fin |
7134 |
Date de première publication |
2016-06-14 |
ISSN |
1936-0851 |
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. Show less |
DOI | 10.1021/acsnano.6b03278 |
Titre abrégé de la source |
ACS Nano |
Type de publication |
ACL |
Domaine |
Chimie/Matériaux |
Fonction |
aut |
Identifiant idREF |
221579087 19105190X |
Audience |
International |
URL | https://univoak.eu/islandora/object/islandora:57275 |