Aqueous solution route to flower-like microstructures of ferromagnetic nickel nanotips

Flower-like microstructures of ferromagnetic Ni nanotips have been synthesized in aqueous solution at 140 degrees C for 12 h. XRD pattern indicated the sample is cubic Ni with lattice constant a=3.514 angstrom. FE-SEM shown the formation process of Ni sample. Room temperature magnetic characterization of as-prepared Ni sample demonstrates much enhanced ferromagnetic property. The hydrazine hydrate was used as reduced agent and ligand in present synthesis, the possible formation mechanism was also discussed. (c) 2006 Elsevier B.V. All rights reserved.