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dc.contributor.authorSiqueira, Elis Regina Lima-
dc.contributor.authorPinheiro, Willie Oliveira-
dc.contributor.authorAquino, Victor Raul Romero-
dc.contributor.authorCoelho, Breno Cunha Pinto-
dc.contributor.authorBakuzis, Andris Figueiroa-
dc.contributor.authorAzevedo, Ricardo Bentes-
dc.contributor.authorSousa, Marcelo Henrique-
dc.contributor.authorMorais, Paulo Cesar-
dc.date.accessioned2024-07-11T16:32:24Z-
dc.date.available2024-07-11T16:32:24Z-
dc.date.issued2022-08-12-
dc.identifier.citationSIQUEIRA, Elis Regina Lima et al. Engineering gold shelled nanomagnets for pre-setting the operating temperature for magnetic hyperthermia. Nanomaterials, [S. l.], v. 12, n. 16, 2760, DOI: https://doi.org/10.3390/nano12162760 10.3390/nano12162760. Disponível em: https://www.mdpi.com/2079-4991/12/16/2760pt_BR
dc.identifier.urihttp://repositorio2.unb.br/jspui/handle/10482/48763-
dc.language.isoengpt_BR
dc.publisherMDPIpt_BR
dc.rightsAcesso Abertopt_BR
dc.titleEngineering gold shelled nanomagnets for pre-setting the operating temperature for magnetic hyperthermiapt_BR
dc.typeArtigopt_BR
dc.subject.keywordMagnetohipertermia-
dc.subject.keywordNanopartículas magnéticas-
dc.subject.keywordFluidos magnéticos-
dc.subject.keywordTemperatura-
dc.rights.license© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).pt_BR
dc.identifier.doihttps://doi.org/10.3390/nano12162760 10.3390/nano12162760pt_BR
dc.description.abstract1This study investigated the fabrication of spherical gold shelled maghemite nanoparticles for use in magnetic hyperthermia (MHT) assays. A maghemite core (14 ± 3 nm) was used to fabricate two samples with different gold thicknesses, which presented gold (g)/maghemite (m) content ratios of 0.0376 and 0.0752. The samples were tested in MHT assays (temperature versus time) with varying frequencies (100–650 kHz) and field amplitudes (9–25 mT). The asymptotic temperatures (T∞) of the aqueous suspensions (40 mg Fe/mL) were found to be in the range of 59–77 ◦C (naked maghemite), 44–58 ◦C (g/m = 0.0376) and 33–51 ◦C (g/m = 0.0752). The MHT data revealed that T∞ could be successful controlled using the gold thickness and cover the range for cell apoptosis, thereby providing a new strategy for the safe use of MHT in practice. The highest SAR (specific absorption rate) value was achieved (75 kW/kg) using the thinner gold shell layer (334 kHz, 17 mT) and was roughly twenty times bigger than the best SAR value that has been reported for similar structures. Moreover, the time that was required to achieve T∞ could be modeled by changing the thermal conductivity of the shell layer and/or the shape/size of the structure. The MHT assays were pioneeringly modeled using a derived equation that was analytically identical to the Box–Lucas method (which was reported as phenomenological).pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-3366-106Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2137-9588pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1210-8329pt_BR
dc.contributor.affiliationUniversity of Brasília, Institute of Biological Sciences, Department of Genetics & Morphologypt_BR
dc.contributor.affiliationUniversity of Brasília, Faculty of Ceilândia, Green Nanotechnology Grouppt_BR
dc.contributor.affiliationUniversity of Brasília, Faculty of Ceilândia, Post-Graduation Program in Sciences and Health Technologiespt_BR
dc.contributor.affiliationFederal University of Goiás, Institute of Physicspt_BR
dc.contributor.affiliationUniversity of Brasília, Institute of Physicspt_BR
dc.contributor.affiliationFederal Institute of Brasíliapt_BR
dc.contributor.affiliationFederal University of Goiás, Institute of Physicspt_BR
dc.contributor.affiliationFederal University of Goiás, CNanoMedpt_BR
dc.contributor.affiliationUniversity of Brasília, Institute of Biological Sciences, Department of Genetics & Morphologypt_BR
dc.contributor.affiliationUniversity of Brasília, Faculty of Ceilândia, Green Nanotechnology Grouppt_BR
dc.contributor.affiliationUniversity of Brasília, Faculty of Ceilândia, Post-Graduation Program in Sciences and Health Technologiespt_BR
dc.contributor.affiliationUniversity of Brasília, Institute of Physicspt_BR
dc.contributor.affiliationCatholic University of Brasíliapt_BR
dc.description.unidadeInstituto de Ciências Biológicas (IB)pt_BR
dc.description.unidadeDepartamento de Genética e Morfologia (IB GEM)pt_BR
dc.description.unidadeFaculdade UnB Ceilândia (FCE)pt_BR
dc.description.unidadeInstituto de Física (IF)pt_BR
dc.description.ppgPrograma de Pós-Graduação em Ciências e Tecnologias em Saúdept_BR
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