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

Haar, Sébastien; Bruna, Matteo; Lian, Jian Xiang; Tomarchio, Flavia; Olivier, Yoann; Mazzaro, Raffaello; Morandi, Vittorio; Moran, Joseph; Ferrari, Andrea C.; Beljonne, David; Ciesielski, Artur; Samori, Paolo

doi:10.1021/acs.jpclett.6b01260

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

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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

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Titre / Title	Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes
Licence CC / CC licence	Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Version / Version	Version acceptée pour publication (post-print auteur)
Auteurs / Authors	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 / Intern department	Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006
URL éditeur / URL publisher	http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b01260
Langue / Language	en
Volume	7
Numéro / Issue	14
Page de début / Start Page	2714
Page de fin / End Page	2721
Date de première publication / Date Issued	2016-06-28
ISSN	1948-7185
Titre de la revue/du livre/de la source / Journal/book/host title	The Journal of Physical Chemistry Letters
Résumé / Abstract	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. Show less
DOI	10.1021/acs.jpclett.6b01260
Éditeur / Publisher	American Chemical Society
Titre abrégé de la revue/du livre/de la source / Abbreviated journal/book/host title	J. Phys. Chem. Lett.
Type de publication / Publication Type	ACL
Domaine / Topic	Chimie/Matériaux
Unité de recherche extérieure au site / Extern department	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 / Role	aut crp
Audience / Audience	International