Amaro-Gahete, J. Benítez, Almudena Otero Izquierdo, Rocío Esquivel, Dolores Jiménez-Sanchidrián, César Romero-Salguero, F.J. Caballero, Álvaro Morales Palomino, Julián 2019-03-08T08:50:03Z 2019-03-08T08:50:03Z 2019 http://hdl.handle.net/10396/18060 Graphene-based materials are highly interesting in virtue of their excellent chemical, physical and mechanical properties that make them extremely useful as privileged materials in different industrial applications. Sonochemical methods allow the production of low-defect graphene materials, which are preferred for certain uses. Graphene nanosheets (GNS) have been prepared by exfoliation of a commercial micrographite (MG) using an ultrasound probe. Both materials were characterized by common techniques such as X-ray diffraction (XRD), Transmission Electronic Microscopy (TEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). All of them revealed the formation of exfoliated graphene nanosheets with similar surface characteristics to the pristine graphite but with a decreased crystallite size and number of layers. An exhaustive study of the particle size distribution was carried out by different analytical techniques such as dynamic light scattering (DLS), nanoparticle tracking analysis (NTA) and asymmetric flow field flow fractionation (AF4). The results provided by these techniques have been compared. NTA and AF4 gave higher resolution than DLS. AF4 has shown to be a precise analytical technique for the separation of GNS of different sizes. application/pdf eng MDPI https://creativecommons.org/licenses/by/4.0/ Nanomaterials 9(2), 152 (2019) Graphene nanosheets Exfoliation Particle size distribution Nanoparticle tracking analysis Asymmetric flow field flow fractionation A Comparative Study of Particle Size Distribution of Graphene Nanosheets Synthesized by an Ultrasound-Assisted Method info:eu-repo/semantics/article http://dx.doi.org/10.3390/nano9020152 Gobierno de España. MAT2013-44463-R Gobierno de España. MAT2017-87541-R Gobierno de España. FPU17/03981 Junta de Andalucía. FQM-346 Junta de Andalucía. FQM-175 info:eu-repo/semantics/openAccess