Characterization of tetraethylene glycol passivated iron nanoparticles

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorNunes, Eloiza da Silva
dc.creatorViali, Wesley Renato
dc.creatorSilva, Sebastiao William da
dc.creatorHuamani Coaquira, Jose Antonio
dc.creatorGarg, Vijayendra Kumar
dc.creatorOliveira, Aderbal Carlos de
dc.creatorMorais, Paulo Cesar
dc.creatorJafelicci Júnior, Miguel
dc.date2015-03-18T15:53:17Z
dc.date2016-10-25T20:24:45Z
dc.date2015-03-18T15:53:17Z
dc.date2016-10-25T20:24:45Z
dc.date2014-10-01
dc.date.accessioned2017-04-06T07:02:23Z
dc.date.available2017-04-06T07:02:23Z
dc.identifierApplied Surface Science. Amsterdam: Elsevier Science Bv, v. 315, p. 337-345, 2014.
dc.identifier0169-4332
dc.identifierhttp://hdl.handle.net/11449/116420
dc.identifierhttp://acervodigital.unesp.br/handle/11449/116420
dc.identifier10.1016/j.apsusc.2014.07.154
dc.identifierWOS:000342360300048
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2014.07.154
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/927067
dc.descriptionThe present study describes the synthesis and characterization of iron@iron oxide nanoparticles produced by passivation of metallic iron in tetraethylene glycol media. Structural and chemical characterizations were performed using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Mossbauer spectroscopy. Pomegranate-like core@shell nanoparticulate material in the size range of 90-120 nm was obtained. According to quantitative phase analysis using Rietveld structure refinement the synthesized iron oxide was identified as magnetite (Fe3O4) whereas the iron to magnetite mass fractions was found to be 47:53. These findings are in good agreement with the data obtained from Mossbauer and thermal gravimetric analysis (TGA). The XPS data revealed the presence of a surface organic layer with higher hydrocarbon content, possibly due to the tetraethylene glycol thermal degradation correlated with iron oxidation. The room-temperature (300K) saturation magnetization measured for the as-synthesized iron and for the iron-iron oxide were 145 emu g-1 and 131 emu g-1, respectively. The measured saturation magnetizations are in good agreement with data obtained from TEM, XRD and Mossbauer spectroscopy. (C) 2014 Elsevier B.V. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherElsevier B.V.
dc.relationApplied Surface Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectIron@iron oxide
dc.subjectCore@shell
dc.subjectMagnetic nanoparticle
dc.subjectMetallic iron
dc.subjectNanoparticles
dc.subjectPolyol
dc.titleCharacterization of tetraethylene glycol passivated iron nanoparticles
dc.typeOtro


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