Nickel oxide specimens have recently garnered significant attention due to their promising potential in energy storage applications. This study reports on the synthesis of nickel oxide nanoparticles via a facile sol-gel method, followed by a comprehensive characterization using methods such as X-ray diffraction (XRD), scanning electron microscopy (

Nanoparticles possess unique optical properties that have sparked significant interest in their application for diverse technological fields. Upconversion nanoparticles (UCNPs), a particular class of nanomaterials, exhibit the remarkable ability to convert near-infrared photons into visible light. This phenomenon has opened vast possibilities in bi