Development of High Coercivity/High Fluorescence Hybrid nanostructures

Abstract

The study concentrated on the prospects of multifunctional core-shell that can incorporate multiple functions simultaneously. For the sharp and precise assembling of core-shell nanostructures (CS-Ns) combining ferromagnetic-core and semiconducting-shell into a single material with mouldable fluorescence and magnetic features, the seed-mediated aqueous growth technique was flourished. SrFe12O19/CdS CS-Ns were designed to gratify the requirement of magneto-fluorescent features in a solo unit. Characterization techniques such as XRD, VSM and photoluminescence spectroscopy (PL) was used to analyze the as-synthesized CS-Ns. XRD spectra confirm the CS-Ns formation with the pure phase. PL results show that the CS-Ns follow the emission profile of the CdS shell. CS-Ns formation leads to a much better particle size distribution. In VSM analysis, it was observed that the saturation of the hysteresis loop is decayed many times as that of the bare core because of the semiconducting shell covering over the core. Altogether the results were in good agreement with one another. Because of the permanent magnetic nature of SrFe12O19 (1000°C), these CS-Ns are used in the magnetic separation process, where the ferromagnetic core aids in magnetic manipulation, and the fluorescent shell aids in detecting the path of the separated entity.