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dc.contributor.authorAyán Varela, Migueles_ES
dc.contributor.authorParedes Nachón, Juan Ignacioes_ES
dc.contributor.authorGuardia, Lauraes_ES
dc.contributor.authorVillar Rodil, Silviaes_ES
dc.contributor.authorMunuera Fernández, José Maríaes_ES
dc.contributor.authorGonzález, Marcoses_ES
dc.contributor.authorFernández Sánchez, Césares_ES
dc.contributor.authorMartínez Alonso, Ameliaes_ES
dc.contributor.authorDíez Tascón, Juan Manueles_ES
dc.identifier.citationACS Applied Materials and Interfaces 7(19): 10293-10307 (2015)es_ES
dc.descriptionThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see https://doi.org/10.1021/acsami.5b00910es_ES
dc.description.abstractThe stable dispersion of graphene flakes in an aqueous medium is highly desirable for the development of materials based on this two-dimensional carbon structure, but current production protocols that make use of a number of surfactants typically suffer from limitations regarding graphene concentration or the amount of surfactant required to colloidally stabilize the sheets. Here, we demonstrate that an innocuous and readily available derivative of vitamin B2, namely the sodium salt of flavin mononucleotide (FMNS), is a highly efficient dispersant in the preparation of aqueous dispersions of defect-free, few-layer graphene flakes. Most notably, graphene concentrations in water as high as ∼50 mg mL–1 using low amounts of FMNS (FMNS/graphene mass ratios of about 0.04) could be attained, which facilitated the formation of free-standing graphene films displaying high electrical conductivity (∼52000 S m–1) without the need of carrying out thermal annealing or other types of post-treatment. The excellent performance of FMNS as a graphene dispersant could be attributed to the combined effect of strong adsorption on the sheets through the isoalloxazine moiety of the molecule and efficient colloidal stabilization provided by its negatively charged phosphate group. The FMNS-stabilized graphene sheets could be decorated with nanoparticles of several noble metals (Ag, Pd, and Pt), and the resulting hybrids exhibited a high catalytic activity in the reduction of nitroarenes and electroreduction of oxygen. Overall, the present results should expedite the processing and implementation of graphene in, e.g., conductive inks, composites, and hybrid materials with practical utility in a wide range of applications.es_ES
dc.description.sponsorshipFinancial support from the Spanish Ministry of Economy and Competitiveness (MINECO) and the European Regional Development Fund (project MAT2011-26399) is gratefully acknowledged. M.A.-V. is thankful for the receipt of a pre-doctoral contract (FPI) from MINECO.es_ES
dc.publisherAmerican Chemical Societyes_ES
dc.subjectGraphene dispersions,es_ES
dc.subjectGraphene-nanoparticle hybridses_ES
dc.subjectCatalytic reductiones_ES
dc.titleAchieving Extremely Concentrated Aqueous Dispersions of Graphene Flakes and Catalytically Efficient Graphene-Metal Nanoparticle Hybrids with Flavin Mononucleotide as a High-Performance Stabilizeres_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
oprm.item.hasRevisionno ko 0 false*
dc.contributor.orcidParedes Nachón, Juan Ignacio [0000-0002-0044-9153]es_ES
dc.contributor.orcidVillar Rodil, Silvia [0000-0002-5832-9971]es_ES
dc.contributor.orcidMunuera Fernández, José María [0000-0002-8176-4795]es_ES
dc.contributor.orcidMartínez Alonso, Amelia [0000-0002-7183-0859]es_ES
dc.contributor.orcidDíez Tascón, Juan Manuel [0000-0001-9219-7266]es_ES
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