Semiconductor-metal core-shell nanostructures by colloidal heterocoagulation in aqueous medium

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dc.contributor.author Dios Pérez, Miguel de
dc.contributor.author González, Z.
dc.contributor.author Gordo Odériz, Elena
dc.contributor.author Ferrari, Begoña
dc.date.accessioned 2016-06-16T12:41:28Z
dc.date.available 2018-10-02T22:00:06Z
dc.date.issued 2016-10-01
dc.identifier.bibliographicCitation Materials letters, October 2016, vol. 180, pp. 327–331
dc.identifier.issn 0167-577X
dc.identifier.uri http://hdl.handle.net/10016/23222
dc.description.abstract In contrast to complex syntheses for the preparation of colloidal nanocomposites in a core-shell structure proposed in the literature, we present herein a facile colloidal route based on a heterocoagulation process promoted by the electrostatic interaction among ceramic NiO nanoplatelets and metallic Ni nanoparticles (NPs). Before the heterocoagulation process, NiO and Ni were synthetized separately in presence of ultrasound, by chemical precipitation and chemical reduction of the same nickel precursor, respectively. After that, NiO-Ni core-shell nanostructures were prepared forcing the electrostatic interaction among surfaces in aqueous medium. The surface charge balances of both types of particles were tuned effectively by adjusting the pH in a free-additives suspension. For the surface modification of NiO by Ni, the ceramic suspensions maintain a positive zeta potential at pH 9, while the surface of metallic particles is negatively charged. Then the uniform coating of NiO platelets, by the electrostatically induced coagulation with Ni NPs, was favors. The degree of coverage and the formation of NiO-Ni core-shell nanostructures were followed referring the evolution of zeta potential with the geometric calculation in terms of size and morphology of both nanoparticles, and then corroborated by field emission scanning electron microscopy (FESEM).
dc.description.sponsorship The authors acknowledge the support of the projects S2013/MIT-2862 and MAT2012–38650-02–01, MAT2012–38650-C02–02. M. de Dios acknowledges MINECO through the grant FPI-2013 and Dr. Z González acknowledges to MINECO through the grant PTQ-13–05985.
dc.format.extent 9
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.relation.ispartof http://hdl.handle.net/10016/27083
dc.rights © 2016 Elsevier
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Core-shell
dc.subject.other Heterocoagulation
dc.subject.other Nickel oxide
dc.subject.other Metallic nickel
dc.subject.other Colloidal nanocomposites
dc.title Semiconductor-metal core-shell nanostructures by colloidal heterocoagulation in aqueous medium
dc.type article
dc.relation.publisherversion http://dx.doi.org/10.1016/j.matlet.2016.05.179
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi 10.1016/j.matlet.2016.05.179
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MAT2012-38650-C02-01
dc.relation.projectID Gobierno de España. MAT2012-38650-C02-02
dc.relation.projectID Gobierno de España. PTQ-13-05985
dc.relation.projectID Comunidad de Madrid. S2013/MIT-2862/MULTIMAT-CHALLENGE
dc.relation.projectID Gobierno de España. FPI-2013
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 327
dc.identifier.publicationlastpage 331
dc.identifier.publicationtitle Materials letters
dc.identifier.publicationvolume 180
dc.identifier.uxxi AR/0000017993
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