Abstract
Rare earths orthovanadates (REVO4) doped with luminescent lanthanide ions (Ln3+) play an important role as promising light-emitting materials. Gadolinium orthovanadate exhibits strong absorption of ultraviolet radiation and as a matrix doped with Eu3+ ions is well known for its efficient and intense red emission, induced by energy transfer from the VO4 3− groups to Eu3+ ions. In the presented study, Fe3O4@SiO2@GdVO4:Eu3+ 5 % nanomaterial was investigated. The core@shell structures demonstrate attractive properties, such as higher thermal stability, enhanced water solubility, increased optical response, higher luminescence, longer decay times, and magnetic properties. Silica coating may protect nanocrystals from the surrounding environment. Therefore, such silica-covered nanoparticles (NPs) are successfully utilized in biomedical research. Multifunctional magnetic nanophosphors are very interesting due to their potential biomedical applications such as magnetic resonance imaging, hyperthermic treatment, and drug delivery. Therefore, the aim of our study was to investigate photophysical, chemical, and biological properties of multifunctional REVO4 doped with Ln3+. Moreover, the studied NPs did not affect erythrocyte sedimentation rate, cell membrane permeability, and morphology of human red blood cells.
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Acknowledgments
S.L., A. Sz., A.E.G, and T.G. kindly acknowledge the financial support from the National Science Centre (Grant DEC-2012/06/M/ST5/00325). M.R. gratefully acknowledges the financial support from the Polish Ministry of Science and Higher Education; scientific work was financed from the budget for science in 2012-2015 as a research project within the program called „Diamond Grant” Nr DI2011 011441. M.R. is a recipient of the scholarship from the Foundation of Adam Mickiewicz University in Poznań, for the 2014/2015 academic year. T.G. holds a scholarship from the Foundation for Polish Science for Young Scientists (FNP).
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Szczeszak, A., Ekner-Grzyb, A., Runowski, M. et al. Synthesis, photophysical analysis, and in vitro cytotoxicity assessment of the multifunctional (magnetic and luminescent) core@shell nanomaterial based on lanthanide-doped orthovanadates. J Nanopart Res 17, 143 (2015). https://doi.org/10.1007/s11051-015-2950-4
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DOI: https://doi.org/10.1007/s11051-015-2950-4