Gamma irradiation induced synthesis of electromagnetic functionalized aligned CoxNi1?x alloy nanobundles

摘要

Gamma irradiation induced synthesis of metal or metal oxides has received increasing attention due to its mild reaction conditions. Here, we demonstrate the synthesis of aligned Co _( x ) Ni _(1? x ) ( x = 0.25, 0.33, 0.5, 0.67, 0.75) alloy nanobundles via a gamma irradiation induced simultaneous reduction of Co ~(2+) and Ni ~(2+) ions with the assistance of an external magnetic field. The formation of alloy structures was confirmed by element mapping and X-ray absorption studies. Natural ferromagnetic resonance and dielectric loss mainly contribute to the electromagnetic wave absorption of the Co _( x ) Ni _(1? x ) alloy materials, and the composition also has great influence. Co _(1) Ni _(2) ( x = 0.33) has the strongest absorption of ?10.5 dB at 13.6 GHz at a thickness of 2 mm, and the electromagnetic absorption properties can be tuned by the thickness of the Co _( x ) Ni _(1? x ) alloys. We believe synthesis of metal alloys through the gamma irradiation induced reduction technique will be appealing to other areas.