Ligand-Free Synthesis of Tunable Size Ln:BaGdF5 (Ln = Eu3+ and Nd3+) Nanoparticles: Luminescence, Magnetic Properties, and Biocompatibility
| Autor: | Manuel Ocaña, Eugenio Cantelar, Daniel González-Mancebo, Grazyna Stepien, Ana I. Becerro, Fernando Cussó, Jesús M. de la Fuente |
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| Přispěvatelé: | González-Mancebo, Daniel [0000-0003-4156-2918], González-Mancebo, Daniel |
| Rok vydání: | 2016 |
| Předmět: |
Lanthanide
Materials science Tetrafluoroborate Dopant Gadolinium Inorganic chemistry chemistry.chemical_element Nanoparticle 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Paramagnetism chemistry Electrochemistry General Materials Science 0210 nano-technology Bifunctional Luminescence Spectroscopy |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.5b03837 |
| Popis: | Bifunctional and highly uniform Ln:BaGdF5 (Ln = Eu3+ and Nd3+) nanoparticles have been successfully synthesized using a solvothermal method consisting of the aging at 120 °C of a glycerol solution containing the corresponding Lanthanide acetylacetonates and butylmethylimidazolium tetrafluoroborate. The absence of any surfactant in the synthesis process rendered hydrophilic nanospheres (with tunable diameter from 45 nm 85 nm, depending on the cations concentration of the starting solution) which are suitable for bioapplications. The particles are bifunctional because they showed both optical and magnetic properties due to the presence of the optically active lanthanides (Eu3+ in the visible and Nd3+ in the NIR regions of the electromagnetic spectrum) and the paramagnetic gadolinium ion, respectively. The luminescence decay curves of the nanospheres doped with different amounts of Eu3+ and Nd3+ have been recorded in order to determine the optimum dopant concentration in each case, which turned out to be 5% Eu3+ and 0.5% Nd3+. Likewise, proton relaxation times were measured at 1.5 T in water suspensions of the optimum particles found in the luminescence study. The values obtained suggested that both kinds of particles could be used as positive contrast agents for MRI. Finally, it was demonstrated that both the 5% Eu3+ and 0.5% Nd3+-doped BaGdF5 nanospheres showed negligible cytotoxicity for VERO cells for concentrations up to 0.25 mg mL–1. |
| Databáze: | OpenAIRE |
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