{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,6]],"date-time":"2026-09-06T03:58:22Z","timestamp":1788667102461,"version":"build-2803163510"},"reference-count":49,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,8,26]],"date-time":"2021-08-26T00:00:00Z","timestamp":1629936000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["314409\/2020-3"],"award-info":[{"award-number":["314409\/2020-3"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["304107\/2019"],"award-info":[{"award-number":["304107\/2019"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004586","name":"Funda\u00e7\u00e3o Carlos Chagas Filho de Amparo \u00e0 Pesquisa do Estado do Rio de Janeiro","doi-asserted-by":"publisher","award":["E-26\/202.313\/2019"],"award-info":[{"award-number":["E-26\/202.313\/2019"]}],"id":[{"id":"10.13039\/501100004586","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001807","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo","doi-asserted-by":"publisher","award":["13\/07699-0"],"award-info":[{"award-number":["13\/07699-0"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>This study aimed to systematically understand the magnetic properties of magnetite (Fe3O4) nanoparticles functionalized with different Pluronic F-127 surfactant concentrations (Fe3O4@Pluronic F-127) obtained by using an improved magnetic characterization method based on three-dimensional magnetic maps generated by scanning magnetic microscopy. Additionally, these Fe3O4 and Fe3O4@Pluronic F-127 nanoparticles, as promising systems for biomedical applications, were prepared by a wet chemical reaction. The magnetization curve was obtained through these three-dimensional maps, confirming that both Fe3O4 and Fe3O4@Pluronic F-127 nanoparticles have a superparamagnetic behavior. The as-prepared samples, stored at approximately 20 \u00b0C, showed no change in the magnetization curve even months after their generation, resulting in no nanoparticles free from oxidation, as Raman measurements have confirmed. Furthermore, by applying this magnetic technique, it was possible to estimate that the nanoparticles\u2019 magnetic core diameter was about 5 nm. Our results were confirmed by comparison with other techniques, namely as transmission electron microscopy imaging and diffraction together with Raman spectroscopy. Finally, these results, in addition to validating scanning magnetic microscopy, also highlight its potential for a detailed magnetic characterization of nanoparticles.<\/jats:p>","DOI":"10.3390\/nano11092197","type":"journal-article","created":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T04:07:28Z","timestamp":1630382848000},"page":"2197","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Magnetic Characterization by Scanning Microscopy of Functionalized Iron Oxide Nanoparticles"],"prefix":"10.3390","volume":"11","author":[{"given":"Frederico V.","family":"Gutierrez","sequence":"first","affiliation":[{"name":"Department of Physics, Pontifical Catholic University of Rio de Janeiro\u2014PUC-Rio, Rua Marques de S\u00e3o Vicente, Rio de Janeiro 22451-900, RJ, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9549-2711","authenticated-orcid":false,"given":"Anna","family":"De Falco","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Pontifical Catholic University of Rio de Janeiro\u2014PUC-Rio, Rua Marques de S\u00e3o Vicente, Rio de Janeiro 22451-900, RJ, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4246-6282","authenticated-orcid":false,"given":"Elder","family":"Yokoyama","sequence":"additional","affiliation":[{"name":"Institute of Geosciences, University of Bras\u00edlia, Bras\u00edlia 70910-900, DF, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonardo A. 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Marqu\u00eas de S\u00e3o Vicente, 225, G\u00e1vea, Rio de Janeiro 22430-060, RJ, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soudabeh","family":"Arsalani","sequence":"additional","affiliation":[{"name":"Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0622-2814","authenticated-orcid":false,"given":"Oswaldo","family":"Baffa","sequence":"additional","affiliation":[{"name":"Department of Physics, FFCLRP, University of Sao Paulo, Av. Bandeirantes 3900, Ribeir\u00e3o Preto 14040-91, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1180-7021","authenticated-orcid":false,"given":"Jefferson F. D. 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