Influence of Ni doping on Vanadium Oxide / Hexadecylamine Multiwall Nanotubes

MARTÍN E. SALETA; JAVIER CURIALE; HORACIO E. TROIANI; SERGIO RIBEIRO GUEVARA; RODOLFO D. SÁNCHEZ; MARCOS MALTA; ROBERTO M. TORRESI

PHYSICA B - CONDENSED MATTER

elsevier

Año: 2007 vol. 398 p. 333 - 336

0921-4526

In this work, we present a characterization of a hybrid nanocomposite constituted by vanadium oxide (VOx)/ hexadecylamine (Hexa) and the effect of the addition of Ni ions on the magnetic properties. Micrographs of transmission electron microscopy (TEM) show that the nanostructures are multiwall nanotubes. The walls are constituted by the successive intercalation of VOx and Hexa layers. The number of vanadium atoms and the ratio Ni/V were measured by instrumental neutron activation analysis (INAA) and by energy dispersive spectroscopy (EDS), respectively. Measurements of electronic paramagnetic resonance (EPR) and DC magnetic susceptibility, as a function of temperature, reveal that the Ni doping reduces considerably the amount of V4+ present in the system.