Fabrication and magnetic properties of Co-Ni-P rod-shaped hollow structures based on Bacillus template

A new type of Co-Ni-P rod-shaped hollow structures was prepared by electroless deposition based on Bacillus template. The metal plating layer was deposited on the surface of Bacillus, which is a kind of rod-shaped bacteria. The composition, microstructure, phase structures and magnetic properties of the hollow structures were studied. The results clearly demonstrated that the Bacillus were coated by Co-Ni-P metal plating layer and the thickness of the metal layer was around 150-200 nm. The average contents of Co, Ni, and P element of the metal layer were about 18.73 wt.%, 74.43 wt.% and 3.04 wt.%, respectively. The values of saturation magnetization (Ms), remnants magnetization (Mr) and coercivity (Hc) of the hollow structures were about 92.5 emu/g, 29.7 emu/g, and 768.7 Oe, respectively. Crown