Development Characterization and Processing of Magneto Fluorescent Nanostructures for Multimodal Applications

Abstract

The seed-mediated aqueous growth approach has been developed for the selective and controlled fabrication of core-shell nanostructures (CSNs) , that combines various functionalities of ferromagnetic-core and semiconducting-shell within a solo material that has tunable magnetic and fluorescence characteristics. CSNs have been developed in a way that can meet the demand for magneto-fluorescent properties in a single unit. Shell thickness and core in the nanostructured particle have been tuned precisely. The current research focuses on CSNs made of soft ferrite and hard ferrite. CSNs were compared in a study where the core was annealed at two different temperatures. A new assembly of magneto-fluorescent CSNs was created using a magnetic core of Nickel Zinc ferrite (Soft ferrites) and Strontium Hexaferrite (Hard ferrite) and a fluorescent semiconducting shell of CdS quantum dots (QDs) which is having brilliant physical and chemical characteristics of discrete magnetic core and discrete QD s shell. These CSNs have been created to address several constraints of the iron-oxide based magneto-fluorescent or magneto-plasmon nanostructures that had previously been examined in the field. CdS QDs were successfully generated on the SHF/NZF surface, and UV visible spectroscopy, photoluminescence spectroscopy, VSM, and FTIR revealed a clear add-on with good stability and intactness of core and shell. To explore the elaborative impacts of different structural combinations of CSNs in order to reach the optimal arrangement with high-luminescence and magnetic results, optical and magnetic characterizations were done. The magnetic/nonmagnetic nanostructure interface was examined. Despite the non-magnetic (di-magnetic) nature of CdS QDs, that is obviously an quotoptically-activequot and quotmagnetically-inactivequot material, considerable exchange-bias has been seen in some of the CSNs. The existence of quotexchange-biasquot has been confirmed by a shift in the susceptibility derivative as well as a change in quotmag