Magnetic Properties of γ - Fe2O3 Nanoparticles at the Verge of Nucleation Process.
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
06/05/2014
06/05/2014
01/08/2013
|
| Resumo |
A low-energy new method based in a one-step synthesis at room temperature produces very small maghemite nanopar ticles. The fast neutralization reaction (co-precipitation) of a ferric solution (FeCl3 aqueous) in a basic medium (NH4OH concentrated) produces an intermediate phase, presumably two-line ferrihydrite, that in oxidizing conditions is transformed to maghemite nanopar ticles. That “primordial soup” is characterized by small atom arrangements that are the base for maghemite tiny crystals. The final product of the reaction was characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray absorption fine structure, Mössbauer spectroscopy, and magnetometry. CONICET ANPCyT COLCIENCIAS CONACYT CNPEM LNLS |
| Identificador |
IEEE Transactions on Magnetics, v.49, n.8, p.4555-4558, Aug, 2013 http://www.producao.usp.br/handle/BDPI/44742 http://dx.doi.org/10.1109/TMAG.2013.2259619 http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6566086&tag=1 |
| Idioma(s) |
eng |
| Publicador |
NEW JERSEY |
| Relação |
IEEE Transactions on Magnetics |
| Direitos |
restrictedAccess © Copyright IEEE |
| Palavras-Chave | #Chemical synthesis #High-resolution transmission electron microscopy (HR-TEM) #Mössbauer spectroscopy #X-ray absorption fine structure (XAFS) #Síntese química #Microscopia eletrônica #Absorção #Raios x |
| Tipo |
article original article publishedVersion |
