Synthesis and characterization of lanthanide-doped sodium holmium fluoride nanoparticles for potential application in photothermal therapy

An Erratum to this article was published on 02 September 2020

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Abstract

Upconversion nanoparticles (UC NPs) in combination with plasmonic materials have great potential for cancer photothermal therapy. Recently, sodium holmium fluoride (NaHoF4) is being investigated for luminescence and magnetic resonance imaging (MRI) contrast agent. Here, we present successful synthesis of excellent quality doped NaHoF4 NPs for possible UC luminescence application and coated for possible photothermal therapy application. Synthesized NaHoF4 nanocrystals were doped with Yb/Er and coated with gold, gold/silica, silver and polypyrrole (PPy). XRD, XPS and TEM were used to determine structure and morphology of the NPs. Strong UC photoluminescence (PL) emission spectra were obtained from the NPs when excited by near-infrared (NIR) light at 980 nm. Cell viability and toxicity of the NPs were characterized using pancreatic and ovarian cancer cells with results showing that gold/ silica coating produced least toxicity followed by gold coating.

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  • 02 September 2020

    The authors did not realize that the presentations of some TEM images were incorrect. The versions of such figures and the corresponding text should be changed as follows.

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Acknowledgements

Authors like to thank Professor Dhiraj Sardar at the Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas for allowing to perform the photoluminescence work in his lab.

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Correspondence to Jharna Chaudhuri.

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Das, K., Kumar, G.A., Mirandola, L. et al. Synthesis and characterization of lanthanide-doped sodium holmium fluoride nanoparticles for potential application in photothermal therapy. Front. Mater. Sci. 13, 389–398 (2019). https://doi.org/10.1007/s11706-019-0480-1

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Keywords

  • photothermal therapy
  • upconversion
  • photoluminescence
  • nanoparticle
  • sodium holmium fluoride