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Magneto-Fluorescent Yolk–Shell Nanoparticles

We present a new strategy for the fabrication of magneto-fluorescent nanoparticles designed for bimodal imaging. These hybrid nanostructures comprise an optically active semiconductor nanoparticle quantum dot core with tunable fluorescence, encapsulated within a hollow paramagnetic iron oxide shell that serves as an MRI contrast agent. The yolk–shell morphology enables incorporation of the semiconductor and magnetic domains into a single structure, while avoiding direct contact between them, which typically results in quenching of the desired optical fluorescence. We successfully demonstrate utilization of the ultrasmall (15 nm hydrodynamic size) magneto-fluorescent CdSe@CdS@Hollow-Fe2O3 nanoparticles for multimodal imaging of cells at the intracellular level.

Authors:   Sandip K. Pahari; Shunit Olszakier; Itamar Kahn; Lilac Amirav
Journal:   Chemistry of Materials
Year:   2018
DOI:   10.1021/acs.chemmater.7b04253
Publication date:   18-Jan-2018
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