Synthesis, optical and magnetic properties of spinel-structured CoAl2O4 nanomaterials
Abstract
Spinel-structured CoAl2O4 nanocrystals (NCs) with sizes from 54-60 nm have been successfully fabricated by the sol-gel method combined with a solid-phase reaction. The effect of sample annealing temperature on optical and magnetic properties, structure, and size was investigated. The spinel structure and size of the CoAl2O4 NCs were confirmed and calculated through X-ray diffraction (XRD). The vibrational characteristics and binding groups of the CoAl2O4 NCs were investigated by infrared absorption spectroscopy and Raman scattering. The absorption and luminescence properties of the CoAl2O4 NCs were investigated through absorption spectroscopy and fluorescence measurements. Hysteresis curve measurement was used to determine the magnetic nature of the material. This study provides new information on optical and magnetic properties and application prospects of CoAl2O4 nanomaterials in the field of digital color printing.
