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Fluorescence-Magnetism Functional EuS Nanocrystals with Controllable Morphologies for Dual Bioimaging
Yuanqing Sun1, Dandan Wang2, Tianxin Zhao1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
ACS Applied Materials & Interfaces
|December 15, 2016
Summary
Researchers developed rare earth EuS nanocrystals (NCs) with both luminescence and magnetism. These biocompatible NCs show promise for simultaneous fluorescence and magnetic resonance bioimaging applications.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Multifunctional materials are crucial for advanced biosystems.
- Rare earth nanocrystals (NCs) offer unique optical and magnetic properties.
Purpose of the Study:
- To synthesize divalent Europium Sulfide (EuS) nanocrystals (NCs) with combined luminescent and magnetic properties.
- To explore their potential for biomedical applications, particularly in bioimaging.
Main Methods:
- EuS NCs were synthesized using 1-Dodecanethiol (DT) and oleylamine (OLA) as reducing agents.
- Surface modification with amphiphilic block copolymer F127 enabled water phase transfer.
- Characterization included assessment of luminescence, magnetism, morphology, and biocompatibility.
Main Results:
- EuS NCs exhibited controllable shapes, uniform size, and bright luminescence (3.5% quantum yield).
- Oleylamine (OLA) facilitated tunable morphologies (nanowires, nanorods, nanospheres).
- The NCs demonstrated room temperature paramagnetism and excellent biocompatibility in water, retaining their properties.
Conclusions:
- EuS NCs are multifunctional materials with bright luminescence and paramagnetism.
- Their tunable morphology and good biocompatibility make them suitable for bioimaging.
- These NCs show significant promise for simultaneous magnetic resonance and fluorescence bioimaging.
