Description:
<jats:title>Abstract</jats:title><jats:p>The structures, morphology and magnetic properties of the ultrafine Ni nanoparticles prepared by microwave‐assisted polyol method was investigated, using X‐ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM), respectively. The XRD results suggested that Ni nanoparticles with an fcc structure were successfully synthesized. It was interesting to note that the Ni nanoparticles are ideally spherical, which were examined by the TEM. As immersed in different solutions, we can get different shape nickel particles with different conditions. Especially, the experimental results indicated that nanohair nickel particles were ferromagnetic.</jats:p>