Artículo
On the Nature of Defects in Liquid-Phase Exfoliated Graphene
Bracamonte, Maria Victoria
; Lacconi, Gabriela Ines
; Urreta, Silvia Elena; Foa Torres, Luis Eduardo Francisco
Fecha de publicación:
06/2014
Editorial:
American Chemical Society
Revista:
Journal of Physical Chemistry C
ISSN:
1932-7447
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Liquid-phase exfoliation is one of the most promising routes for large-scale production of multilayer graphene dispersions. These dispersions, which may be used in coatings, composites, or paints, are believed to contain disorder-free graphene multilayers. Here, we address the nature of defects in such samples obtained by liquid-phase exfoliation of graphite powder in N-methyl-2-pyrrolidone. Our Raman spectroscopy data challenge the assumption that these multilayers are free of bulk defects, revealing that defect localization strongly depends on the sonication time. For short ultrasound times, defects are located mainly at the layer edges but they turn out to build up in the bulk for ultrasonic times above 2 h. This knowledge may help to devise better strategies to achieve high-quality graphene dispersions.
Palabras clave:
Graphene
,
Liquid-Phase Exfoliation
,
Edges Defects
Archivos asociados
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Identificadores
Colecciones
Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Citación
Bracamonte, Maria Victoria; Lacconi, Gabriela Ines; Urreta, Silvia Elena; Foa Torres, Luis Eduardo Francisco; On the Nature of Defects in Liquid-Phase Exfoliated Graphene; American Chemical Society; Journal of Physical Chemistry C; 118; 28; 6-2014; 15455-15459
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