Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes

Haar, S., Bruna, M., Lian, J. X., Tomarchio, F., Olivier, Y., Mazzaro, R., … Samori, P. (sans date). Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes. The Journal Of Physical Chemistry Letters, 7(14), 2714-2721. doi:10.1021/acs.jpclett.6b01260
Accès libre Peer reviewed
Version acceptée pour publication (post-print auteur)
Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Auteurs Sébastien Haar
Matteo Bruna
Jian Xiang Lian
Flavia Tomarchio
Yoann Olivier
Raffaello Mazzaro
Vittorio Morandi
Joseph Moran
Andrea C. Ferrari
David Beljonne
Artur Ciesielski
Paolo Samori
Unité de recherche du site

Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006
URL éditeur http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b01260
Langue

en
Volume

7
Numéro

14
Page de début

2714
Page de fin

2721
Date de première publication

2016-06-28
ISSN

1948-7185
Titre de la source (revue, livre…)

The Journal of Physical Chemistry Letters
Résumé

Graphene has unique physical and chemical properties, making it appealing for a number of applications in optoelectronics, sensing, photonics, composites, and smart coatings, just to cite a few. These require the development of production processes
Show moreGraphene has unique physical and chemical properties, making it appealing for a number of applications in optoelectronics, sensing, photonics, composites, and smart coatings, just to cite a few. These require the development of production processes that are inexpensive and up-scalable. These criteria are met in liquid-phase exfoliation (LPE), a technique that can be enhanced when specific organic molecules are used. Here we report the exfoliation of graphite in N-methyl-2-pyrrolidinone, in the presence of heneicosane linear alkanes terminated with different head groups. These molecules act as stabilizing agents during exfoliation. The efficiency of the exfoliation in terms of the concentration of exfoliated single- and few-layer graphene flakes depends on the functional head group determining the strength of the molecular dimerization through dipole–dipole interactions. A thermodynamic analysis is carried out to interpret the impact of the termination group of the alkyl chain on the exfoliation yield. This combines molecular dynamics and molecular mechanics to rationalize the role of functionalized alkanes in the dispersion and stabilization process, which is ultimately attributed to a synergistic effect of the interactions between the molecules, graphene, and the solvent.
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DOI 10.1021/acs.jpclett.6b01260
Éditeur

American Chemical Society
Titre abrégé de la source

J. Phys. Chem. Lett.
Type de publication

ACL
Domaine

Chimie/Matériaux
Unité de recherche extérieure au site

Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
Laboratory for Chemistry of Novel Materials, Center for Research in Molecular Electronics and Photonics, University of Mons, Pla
Consiglio Nazionale delle Ricerche (CNR), Istituto per la Microelettronica e i Microsistemi (IMM) Sede di Bologna, Via Gobetti 1
Fonction

aut
crp
Audience

International