Nickel Nanowires: Systematic Design and Fabrication aminterfaces
Jan 9 2023Reviewed by Megan Craig, M.Sc. A research group headed by Professor Hui Wang and Associate Professor Zhigao Sheng from the Chinese Academy of Sciences reported the synthesis of polyvinylpyrrolidone-directed nickel nanowires via solvothermal technique supported by a strong magnetic field in work published in Advanced Materials Interfaces.
However, the smooth surface and negligible magnetism of nickel nanowires manufactured using standard methods prevent electromagnetic waves from passing through the absorber and dissipating heat energy. As a result, it is essential to devise a novel approach for increasing the surface roughness and magnetic characteristics of nickel nanowires, as well as improving their microwave absorption capability.
9T-PNNW fabricated in a 9 T magnetic field has a greater aspect ratio, a more significant specific surface area, and improved magnetic characteristics, resulting in good microwave absorption performance. At 4.08 GHz, the minimum reflection loss is achieved with a thickness of 4.5 mm. The effective absorption bandwidth from 14.4 GHz to 18.0 GHz can surpass 3.6 GHz when the thickness is 1.5 mm.
This research sets the stage for the rational design and fabrication of nickel nanowires, and more crucially, the magnetic field has reference significance for the regulation of absorbent performance.
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