Effect of the different synthetic parameters on the morphology and magnetic properties of nickel nanoparticles

Veronica Paredes-Garcia, Carlos Cruz, Nestor Toledo, Juliano Denardin, Diego Venegas-Yazigi, Carolina Castillo, Evgenia Spodine, Zhiping Luo

Resultado de la investigación: Contribución a una revistaArtículo

5 Citas (Scopus)

Resumen

Coated stable metallic nickel nanocrystals (fcc-Ni) forming micro- and nanoaggregates with different morphologies have been synthesized through a one-pot NiII reduction process in the presence of l-serine (Ni-1 to Ni-5). The subsequent warming under solvothermal conditions of the spherical nickel particles (Ni-1) with ethylene glycol (EG) modifies the morphology of the initial spheres to hexagonal-quasi circular plates, which are disposed as a 3D arrangement (Ni-4). Electron microscopy images indicate that the size of these aggregates is 2 μm, the thickness of the plates being ca. 110-200 nm. The magnetic measurement results for Ni-4 show a ferromagnetic behaviour with both enhanced coercivity (92 Oe) and magnetic remanence (7 emu g-1), and lower magnetic saturation (43 emu g-1), as compared with bulk nickel. The enhancement of the ferromagnetic properties observed for all the studied NPs is attributed to their dependence on the shape anisotropy and dipolar interactions.

Idioma originalInglés
Páginas (desde-hasta)837-844
Número de páginas8
PublicaciónNew Journal of Chemistry
Volumen38
N.º2
DOI
EstadoPublicada - feb 2014

Áreas temáticas de ASJC Scopus

  • Catálisis
  • Química (todo)
  • Química de los materiales

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