Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/328730
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampMuraca, Diegopt_BR
dc.contributor.authorunicampMoscoso Londono, Oscarpt_BR
dc.contributor.authorunicampKnobel, Marcelopt_BR
dc.typeArtigopt_BR
dc.titleSurface And Interface Interplay On The Oxidizing Temperature Of Iron Oxide And Au-iron Oxide Core-shell Nanoparticlesen
dc.titleSurface and interface interplay on the oxidizing temperature of iron oxide and Au-iron oxide core-shell nanoparticlespt_BR
dc.contributor.authorSarveenapt_BR
dc.contributor.authorMuraca, D.pt_BR
dc.contributor.authorZelis, P. M.pt_BR
dc.contributor.authorJaved, Y.pt_BR
dc.contributor.authorAhmad, N.pt_BR
dc.contributor.authorVargas, J. M.pt_BR
dc.contributor.authorMoscoso-Londoño, O.pt_BR
dc.contributor.authorKnobel, M.pt_BR
dc.contributor.authorSingh, M.pt_BR
dc.contributor.authorSharma, S. K.pt_BR
dc.subjectGolden
dc.subjectHyperthermiaen
dc.subjectMossbaueren
dc.subjectNanostructuresen
dc.subjectCádmio, Óxidos de ferro, Nanopartículaspt_BR
dc.subject.otherlanguageCadmium, Iron oxides, Nanoparticlespt_BR
dc.description.abstractThis article presents the effect of oxidation temperature on shape anisotropy, phase purity and growth of core-shell heterostructures and consequently their effect on structure-property relationships. Iron oxide and Au-iron oxide nanocomposites were synthesized by a thermal decomposition method by passing pure oxygen at different temperatures (125-250 degrees C). The prepared nanoparticles were surface functionalized by organic molecules; the presence of the organic canopy prevented both direct particle contact as well as further oxidation, resulting in the stability of the nanoparticles. We have observed a systematic improvement in the core and shell shape through tuning the reaction time as well as the oxidizing temperatures. Spherical and spherical triangular shaped core-shell structures have been obtained at an optimum oxidation temperature of 125 degrees C and 150 degrees C for 30 minutes. However, further increase in the temperature as well as oxidation time results in core-shell structure amendment and results in fully grown core-shell heterostructures. As stability and ageing issues limit the use of nanoparticles in applications, to ensure the stability of the prepared iron oxide nanoparticles we performed XRD analysis after more than a year and they remained intact showing no ageing effect. Specific absorption rate values useful for magnetic fluid hyperthermia were obtained for two samples on the basis of detailed characterization using X-ray diffraction, high-resolution transmission electron microscopy, Mossbauer spectroscopy, and dc-magnetization experiments.en
dc.description.abstractThis article presents the effect of oxidation temperature on shape anisotropy, phase purity and growth of core-shell heterostructures and consequently their effect on structure-property relationships. Iron oxide and Au-iron oxide nanocomposites were synthesized by a thermal decomposition method by passing pure oxygen at different temperatures (125-250 degrees C). The prepared nanoparticles were surface functionalized by organic molecules, the presence of the organic canopy prevented both direct particle contact as well as further oxidation, resulting in the stability of the nanoparticles. We have observed a systematic improvement in the core and shell shape through tuning the reaction time as well as the oxidizing temperatures. Spherical and spherical triangular shaped core-shell structures have been obtained at an optimum oxidation temperature of 125 degrees C and 150 degrees C for 30 minutes. However, further increase in the temperature as well as oxidation time results in core-shell structure amendment and results in fully grown core-shell heterostructures. As stability and ageing issues limit the use of nanoparticles in applications, to ensure the stability of the prepared iron oxide nanoparticles we performed XRD analysis after more than a year and they remained intact showing no ageing effect. Specific absorption rate values useful for magnetic fluid hyperthermia were obtained for two samples on the basis of detailed characterization using X-ray diffraction, high-resolution transmission electron microscopy, Mossbauer spectroscopy, and dc-magnetization experiments.pt_BR
dc.relation.ispartofRSC advancespt_BR
dc.relation.ispartofabbreviationRSC adv.pt_BR
dc.publisher.cityCambridgept_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherRoyal Society of Chemistrypt_BR
dc.date.issued2016pt_BR
dc.date.monthofcirculationJulypt_BR
dc.identifier.citationRsc Advances. Royal Soc Chemistry, v. 6, p. 70394 - 70404, 2016.pt_BR
dc.language.isoengpt_BR
dc.description.volume6pt_BR
dc.description.issuenumber74pt_BR
dc.description.firstpage70394pt_BR
dc.description.lastpage70404pt_BR
dc.rightsabertopt_BR
dc.sourceWOSpt_BR
dc.identifier.eissn2046-2069pt_BR
dc.identifier.doi10.1039/c6ra15610jpt_BR
dc.identifier.urlhttps://pubs.rsc.org/en/content/articlelanding/2016/RA/C6RA15610Jpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA E AO DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO DO MARANHÃO - FAPEMApt_BR
dc.description.sponsorshipFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsorship1FUNDAÇÃO DE AMPARO À PESQUISA E AO DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO DO MARANHÃO - FAPEMApt_BR
dc.description.sponsorship1FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsordocumentnumberSem informaçãopt_BR
dc.description.sponsordocumentnumber2014/26672-8pt_BR
dc.date.available2017-11-13T13:44:18Z-
dc.date.accessioned2017-11-13T13:44:18Z-
dc.description.provenanceMade available in DSpace on 2017-11-13T13:44:18Z (GMT). No. of bitstreams: 1 000381512800087.pdf: 4177709 bytes, checksum: 7755055a1d5612401b9075a3225b20a3 (MD5) Previous issue date: 2016 Bitstreams deleted on 2020-09-02T13:42:21Z: 000381512800087.pdf,. Added 1 bitstream(s) on 2020-09-02T13:46:42Z : No. of bitstreams: 1 000381512800087.pdf: 4239420 bytes, checksum: 228e585b81e3dd54c5b9c7a7f22c9dfb (MD5)en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/328730-
dc.contributor.departmentDepartamento de Física da Matéria Condensadapt_BR
dc.contributor.departmentDepartamento de Física da Matéria Condensadapt_BR
dc.contributor.departmentDepartamento de Física da Matéria Condensadapt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.identifier.source000381512800087pt_BR
dc.creator.orcid0000-0002-4530-4265pt_BR
dc.creator.orcid0000-0003-3366-579Xpt_BR
dc.creator.orcid0000-0002-6540-9267pt_BR
dc.type.formArtigopt_BR
dc.description.sponsorNoteSKS is grateful to FAPEMA for providing financial support. Sarveena would like to thank UGC-DAE CSR, Indore Centre for financial support under CRS Scheme. J. M. would like to acknowledge the full support by Conicet. O. M. L. acknowledges FAPESP grant 2014/26672-8.pt_BR
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