In
the present work, we report, for the first time, the synthesis
of a Cu–Ni-nanoalloy-based composite demonstrating remarkable
magnetic activity as compared to that of the Ni nanoparticles. Apart
from its possessing 3 times as much magnetic permeability as Ni powder,
we have discovered unique properties exhibited by the product nanoparticles
in the colloidal state in aqueous solutions. By applying an external
magnetic field, a three-dimensional optical modulation with a transmission
coefficient of 20–90% was observed.
We report here a low-temperature method for the growth of self-organized nanoscale nickel-based particles with high energy storage properties. The Ni balls covered with highly porous NiO / NiOH thin shells are shown to form in an amine solution. High specific surface area (S BET = 56 m 2 /g) and crystallinity (Scherrer size = 28±0.5nm) made it possible to achieve a specific capacity of 2742 F/g at a scanning rate of 2 mV/s, which is higher in terms of mass of a surfactant layer than reported previously for other chemical approaches. In addition, an operating stability of at least 5000 cycles for electrodes produced on the basis of the synthesized particles is proved
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