d-FeOOH : a superparamagnetic material for controlled heat release under AC magnetic field.
Nenhuma Miniatura disponível
Data
2013
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Experimental evidences on its in vitro use reveal
that d-FeOOH is a material that release-controlled amount of
heat if placed under an AC magnetic field. d-FeOOH
nanoparticles were prepared by precipitating Fe(OH)2 in
alkaline solution followed by fast oxidation with H2O2. XRD
and 57Fe Mo¨ssbauer spectroscopy data confirmed that
d-FeOOH is indeed the only iron-bearing compound in the
produced sample. TEM images evidence that the averaged
particle sizes for this d-FeOOH sample is 23 nm.Magnetization
measurements indicate that these d-FeOOH particles
behave superparamagnetically at 300 K; its saturationmagnetization
was found to be 13.2 emu g-1; the coercivity and the
remnant magnetization were zero at 300 K. The specific
absorption rate values at 225 kHz were 2.1, 6.2, and
34.2 W g-1, under 38, 64, and 112 mT, respectively. The
release rate of heat can be directly controlled by changing the
mass of d-FeOOHnanoparticles. In view of these findings, the
so-preparedd-FeOOHis a real alternative tobe further tested as
amaterial formedicalpractices in therapies involving magnetic
hyperthermia as in clinical oncology.
Descrição
Palavras-chave
Iron oxides, Hyperthermia, Magnetic properties
Citação
CHAGAS, P. et al. d-FeOOH: a superparamagnetic material for controlled heat release under AC magnetic field. Journal of Nanoparticle Research, v. 15, p. 1537-1544, 2013. Disponível em:<https://link.springer.com/article/10.1007%2Fs11051-013-1544-2>. Acesso em: 16 jun. 2017.