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(A) Schematic representation of the synthesis of gold-decorated nickel ferrite nanoparticles dispersed in ethanol. (B) Schematic representation of the synthesis of core/shell nickel ferrite/gold nanoparticles by “seeding” method. (C) Absorption spectra of nickel ferrite nanoparticles decorated with gold nanoparticles and nickel ferrite/gold core/shell nanoparticles.
