Journal
MATERIALS LETTERS
Volume 62, Issue 17-18, Pages 2571-2573Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2007.12.057
Keywords
microwave; nickel nanoparticles; nanoflowers; self-assembly; nanomaterials; microstructure
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Nickel nanoparticles with uniform, monomorphic self-assembled flower-like microstructure were synthesized by reduction of nickel chloride with hydrazine hydrate in the presence of polyvinylpyrrolidone (PVP) in ethylene glycol under microwave irradiation. An appropriate amount of Na2CO3 was necessary for the formation of monomorphic and uniform Ni nanoflowers. Small amount of NaOH and a higher concentration of hydrazine were beneficial to the formation of Ni nanoflowers with a smaller diameter and a narrower distribution. The transmission electron microscopy (TEM) and X-ray diffraction measurements manifested that the as-synthesized Ni nanoflower was the assembles self-organized by hundreds of smaller primary nanoparticles with an average dimension of about 6.3 nm. (C) 2008 Elsevier B.V. All rights reserved.
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