Sensitivity of Nickel-Doped Zinc Ferrite Nanostructures Prepared by Reactive Sputtering
Abstract
This study examined the impact of substituting nickel for iron(III) in the normal spinel ZnFe₂O₄ crystal structure at electrochemical interfaces, either partially or completely. The resulting ZnNiₓFe₂₋ₓO₄ nanostructures had a spherical morphology with an average particle size ranging from 15 to 45 nm. Their energy band gaps varied between 2.05 and 3.02 eV. All synthesized materials retained a normal spinel structure, attributed to the octahedral site preference energy (OSPE) of Zn²⁺, Fe³⁺, Co2+ and Ni2⁺ ions.
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