A metal-reduction route to synthesis of nickel nanotubules

Nickel nanotubule was synthesized using reduction of nickel chloride by metallic zinc in aqueous solution in presence of ethanol amine at room temperture. X-ray diffraction (XRD) and electron diffraction showed that the as-prepared nanotubules were nickel with a face centered cubic structure. Transmission electron microscope (TEM) indicated that the length of the nickel nanotubules were 500–1000 nm with inner diameter 30–150 nm and the thickness of their wall 5–20 nm. The magnetic properties of the nanotubules reached as high as coercivity Hc≈95 Oe.