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Issue 2, 2014
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Effect of the different synthetic parameters on the morphology and magnetic properties of nickel nanoparticles

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Abstract

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.

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

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Publication details

The article was received on 02 Sep 2013, accepted on 06 Dec 2013 and first published on 09 Dec 2013


Article type: Paper
DOI: 10.1039/C3NJ01040F
Author version available: Download Author version (PDF)
Citation: New J. Chem., 2014,38, 837-844
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    Effect of the different synthetic parameters on the morphology and magnetic properties of nickel nanoparticles

    V. Paredes-Garcia, C. Cruz, N. Toledo, J. Denardin, D. Venegas-Yazigi, C. Castillo, E. Spodine and Z. Luo, New J. Chem., 2014, 38, 837
    DOI: 10.1039/C3NJ01040F

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