Abstract
AbstractSummary: In this study it is presented the synthesis and the characterization of Fluorescent‐Magnetic Nanostructures based on polymer‐quantum dots conjugates. Polyvinyl alcohol (PVA) was used as the capping‐ligand for the preparation of CdxMn1‐xS semiconductor nanocrystals via aqueous colloidal chemistry. Different substitution ratios of Cd2+ by Mn+2 ions were investigated aiming at the formation of stable nanoparticles with photo‐luminescent and semi‐magnetic properties. UV‐visible spectroscopy (UV‐vis), photoluminescence spectroscopy (PL), Electric Paramagnetic Resonance Spectroscopy (EPR), and transmission electron microscopy (TEM) were used to characterize the formation and the relative stability of CdxMn1‐xS nanoparticles. The results have showed the influence of the Mn2+partially replacing Cd2+ in the optical behavior of the quantum dots (QDs) produced. In addition, the CdxMn1‐xS QDs have evidenced luminescent and semi‐magnetic properties. Thus, the biocompatible water‐soluble polymer was effective as ligand for synthesizing and stabilizing QDs conjugates with properties allowing them to be potentially applied as imaging and labeling probes in the biomedical field.
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