INIFTA   05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
A Bioinspired Approach to the Synthesis of Bimetallic CoNi Nanoparticles
Autor/es:
GÁLVEZ, N.; VALERO, E.; CEOLÍN, M.; TRASOBARES, S.; LÓPEZ-HARO, M.; CALVINO, J.J.; DOMÍNGUEZ-VERA, J.M.
Revista:
INORGANIC CHEMISTRY
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: NewYork; Año: 2010 vol. 49 p. 1705 - 1711
ISSN:
0020-1669
Resumen:
Bimetallic CoNi nanoparticles have been prepared within the apoferritin cavity. The protein shell controls Size, prevents aggregation, and makes nanoparticles water-soluble. The CoNi series prepared in this way were structurally and magnetically characterized, the resulting magnetic properties varying accordingly with composition (Co75/Ni25, Co50/Ni50, Co25/Ni75). Co and Ni metals were associated in each nanoparticle, as demonstrated by high-angle annular dark field scanning electron microscopy and electron energy loss spectroscopy (EELS). After intentional oxidation, the CoNi nanoparticles were characterized by EELS, X-ray absorption near edge structure (XANES), and SQUID measurements to evaluate the importance of the oxidation on magnetic properties.(Co75/Ni25, Co50/Ni50, Co25/Ni75). Co and Ni metals were associated in each nanoparticle, as demonstrated by high-angle annular dark field scanning electron microscopy and electron energy loss spectroscopy (EELS). After intentional oxidation, the CoNi nanoparticles were characterized by EELS, X-ray absorption near edge structure (XANES), and SQUID measurements to evaluate the importance of the oxidation on magnetic properties.