Self-organization of nickel nanoparticles dispersed in acetone : from separate nanoparticles to three-dimensional superstructures

الملخص EN

Sonochemical synthesis of monodisperse nickel nanoparticles (Ni-NPs) by reduction of Ni acetylacetonate in the presence of polyvinylpyrrolidone stabilizer is reported.

The Ni-NPs size is readily controlled to 5 nanometer diameter with a standard deviation of less than 5%.

The asprepared Ni-NPs sample was dispersed in acetone, for 4 weeks.

For structural analysis was not applied to a magnetic field or heat treatment as key methods to direct the assembly.

The transition from separate Ni-NPs into self-organization of three dimensions (3D) superstructures was studied by electron microscopy.

Experimental analysis suggests that the translation and rotation movement of the Ni-NPs are governed by magnetic frustration which promotes the formation of different geometric arrangements in two dimensions (2D).

The formation of 3D superstructures is confirmed from scanning electron microscopy revealing a layered domain that consists of staking of several monolayers having multiple well-defined supercrystalline domains, enabling their use for optical, electronic and sensor applications.