Optical Characterization of Cobalt Ferrite and Magnetoelectric Cobalt Ferrite-Barium Titanate Core Shell Nanoparticles in Infra-Red Range

Abstract

Cobalt Ferrite- Barium Titanate core-shell nanoparticle has shown application in targeted drug delivery via an external magnetic field. This paper focuses on the absorption peak in the Infrared region of the aforementioned core-shell nanoparticles that can allow scope for application in photo simulation or triggering drug release at a specific absorption band. FTIR was used to verify the absorption peak for 50 nm Cobalt Ferrite nanoparticles, Cobalt Ferrite- Barium Titanate core-shell nanoparticles of 50- 50 composition, and Barium Titanate. The absorption peak was obtained at 2893 nm, 2850 nm, and 2930 nm respectively. The shift was due to the inherent chemical bonds and dielectric properties. The results for absorption peak were verified with Finite Element Analysis using a simulation tool, COMSOL. The results followed a general trend and the absorption peaks were at 2150 nm, 2350 nm, and 2400 nm respectively. Also, the shift in resonance peak for cobalt ferrite and its core-shell with barium titanate was compared with the cavity perturbation technique in the microwave frequency range. It was realized that the shift in resonance mode, quality factor, and loss tangent was slightly higher for core-shell due to the damping effect induced by the difference in optical and dielectric properties.