Magnetic Characterization by Scanning Microscopy of Functionalized Iron Oxide Nanoparticles

Autor(es):Mostrar menos -

Gutierrez, Frederico V. ^[1] ; De Falco, Anna ^[2] ; Yokoyama, Elder ^[3] ; Mendoza, Leonardo A. F. ^[4] ; Luz-Lima, Cleanio ^[5] ; Perez, Geronimo ^[6] ; Loreto, Renan P. ^[7] ; Pottker, Walmir E. ^[8] ; La Porta, Felipe A. ^[8] ; Solorzano, Guillermo ^{[9, 10]} ; Arsalani, Soudabeh ; Baffa, Oswaldo ^[11] ; Araujo, Jefferson F. D. F. ^[1]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Pontif Cathol Univ Rio Janeiro PUC Rio, Dept Phys, Rua Marques Sao Vicente, BR-22451900 Rio De Janeiro, RJ - Brazil

^[2] Pontif Cathol Univ Rio Janeiro PUC Rio, Dept Chem, Rua Marques Sao Vicente, BR-22451900 Rio De Janeiro, RJ - Brazil

^[3] Univ Brasilia, Inst Geosci, BR-70910900 Brasilia, DF - Brazil

^[4] State Univ Rio Janeiro UERJ, Dept Elect Engn, BR-20550900 Rio De Janeiro, RJ - Brazil

^[5] Fed Univ Piaui UFPI, Dept Phys, BR-64049550 Teresina - Brazil

^[6] Univ Fed Fluminense UFF, Dept Mech Engn, Rua Passo, Patrias, n ffi156, BR-24210240 Niteroi, RJ - Brazil

^[7] CBPF, MCTI, Ctr Brasileiro Pesquisas Fisicas, BR-22290180 Rio De Janeiro, RJ - Brazil

^[8] UTFPR, Fed Technol Univ, Ave Pioneiros 3131, BR-86036370 Londrina, PR - Brazil

^[9] Pontif Cathol Univ Rio Janeiro PUC Rio, Dept Chem & Mat Engn, R. Marques Sao Vicente, 225, BR-22430060 Rio De Janeiro, RJ - Brazil

^[10] Physikalisch Techn Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin - Germany

^[11] Univ Sao Paulo, FFCLRP, Dept Phys, Av. Bandeirantes 3900, BR-1404091 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NANOMATERIALS; v. 11, n. 9 SEP 2021.
• Citações Web of Science: 0

Resumo

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 degrees C, 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' 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. (AU)

• Processo FAPESP: 13/07699-0 - Centro de Pesquisa, Inovação e Difusão em Neuromatemática - NeuroMat
• Beneficiário: Oswaldo Baffa Filho
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs