Issue 35, 2013

Controllable synthesis of size-tunable h-nickel nanoparticles

Abstract

Hexagonal close-packed Ni (h-Ni) nanoparticles were prepared on the nanoscale via a thermal decomposition approach using nickel acetate tetrahydrate as the precursor, oleylamine (OAm) as the ligand and noncoordinating octadecene as the solvent. Systematic analysis revealed that the generation of urchin-like particles, as well as their size evolution, strongly depended on the reactivity of the nickel ions, controlled mainly by the concentration of oleylamine. By altering the concentration of oleylamine, the diameters of the urchin-like NPs were tunable from 400 to 50 nm. Moreover, the as-prepared urchin-like particles possessed good structural stability, which could be kept over a long period of sonication without morphology variation. A step wise growth mechanism of the urchin-like structure is proposed. The influence of size on the magnetic properties of the h-Ni nanoparticles is also studied. Magnetic hysteresis measurements revealed that the hierarchical nickel nanostructures possess ferromagnetic behavior and the coercivity reaches its highest values when the particle size is approximately 200 nm.

Graphical abstract: Controllable synthesis of size-tunable h-nickel nanoparticles

Article information

Article type
Communication
Submitted
03 May 2013
Accepted
26 Jun 2013
First published
26 Jun 2013

CrystEngComm, 2013,15, 6923-6927

Controllable synthesis of size-tunable h-nickel nanoparticles

D. Zhang, X. Dou, H. Mao, X. Ma, S. Cai, X. Liu and Z. Tong, CrystEngComm, 2013, 15, 6923 DOI: 10.1039/C3CE40769A

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