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dc.contributor.author
Morales, F.  
dc.contributor.author
Márquez, G.  
dc.contributor.author
Sagredo Arias, Vicente  
dc.contributor.author
Torres Molina, Teobaldo Enrique  
dc.contributor.author
Denardin, Juliano Casagrande  
dc.date.available
2021-01-27T03:17:32Z  
dc.date.issued
2019-11-01  
dc.identifier.citation
Morales, F.; Márquez, G.; Sagredo Arias, Vicente; Torres Molina, Teobaldo Enrique; Denardin, Juliano Casagrande; Structural and magnetic properties of silica-coated magnetite nanoaggregates; Elsevier Science; Physica B: Condensed Matter; 572; 1-11-2019; 214-219  
dc.identifier.issn
0921-4526  
dc.identifier.uri
http://hdl.handle.net/11336/123834  
dc.description.abstract
Magnetite nanoparticles were synthesized by the coprecipitation method. Additionally, two composites of silica-coated magnetite nanoparticles were synthesized by the Stöber method. The synthesized nanocompounds were characterized by X-ray diffraction, FTIR spectroscopy, transmission electron microscopy and vibrating sample magnetometry. The magnetite nanoparticles have a single crystalline phase corresponding to the cubic spinel structure. The magnetite nanocompound is formed by faceted nanoparticles with a mean size of 9 nm, while the composites consist mainly of aggregates of magnetite nanoparticles coated with silica, with mean sizes of 22 and 55 nm. The magnetization measurements of the three nanocompounds suggest that the nanoparticles are in the superparamagnetic regime at room temperature, with a small amount of nanoparticles in the blocked regime.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
COMPOSITES  
dc.subject
COPRECIPITATION  
dc.subject
MAGNETITE  
dc.subject
NANOPARTICLES  
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STÖBER METHOD  
dc.subject.classification
Física de los Materiales Condensados  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Structural and magnetic properties of silica-coated magnetite nanoaggregates  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-12-16T18:20:35Z  
dc.journal.volume
572  
dc.journal.pagination
214-219  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Morales, F.. Universidad de Los Andes; Venezuela  
dc.description.fil
Fil: Márquez, G.. Universidad de Los Andes; Venezuela  
dc.description.fil
Fil: Sagredo Arias, Vicente. Universidad de Los Andes; Venezuela  
dc.description.fil
Fil: Torres Molina, Teobaldo Enrique. Universidad de Zaragoza; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina  
dc.description.fil
Fil: Denardin, Juliano Casagrande. Universidad de Santiago de Chile; Chile  
dc.journal.title
Physica B: Condensed Matter  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.physb.2019.08.007  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0921452619305137