A1 Refereed original research article in a scientific journal
Controlled synthesis, bioimaging and toxicity assessments in strong red emitting Mn2+ doped NaYF4:Yb3+/Ho3+ nanophosphors
Authors: Reddy KL, Rai M, Prabhakar N, Arppe R, Rai SB, Singh SK, Rosenholm JM, Krishnan V
Publisher: ROYAL SOC CHEMISTRY
Publication year: 2016
Journal: RSC Advances
Journal name in source: RSC ADVANCES
Journal acronym: RSC ADV
Volume: 6
Issue: 59
First page : 53698
Last page: 53704
Number of pages: 7
ISSN: 2046-2069
DOI: https://doi.org/10.1039/c6ra07106f
Abstract
Rare earth, Yb3+/Ho3+ doped NaYF4 nanophosphors showed augmentation of visible green and red light emission by the introduction of Mn2+ as a co-dopant. Nanophosphors were characterized for their morphology and upconversion (UC) fluorescence, as a function of co-dopant concentration. The effect of Mn2+ doping has been investigated to explore the UC mechanism of the phosphors. With the introduction of Mn2+, the intensity of all the emission bands was increased, in particular the red band, which was most significant at 40 mol% doping. A possible mechanism for the enhancement of the red emission has been proposed. The prepared UC nanoparticles were functionalized with polyethylene glycol-polyethylene imine co-polymer to make them water dispersible and successfully applied for cancer cell imaging.
Rare earth, Yb3+/Ho3+ doped NaYF4 nanophosphors showed augmentation of visible green and red light emission by the introduction of Mn2+ as a co-dopant. Nanophosphors were characterized for their morphology and upconversion (UC) fluorescence, as a function of co-dopant concentration. The effect of Mn2+ doping has been investigated to explore the UC mechanism of the phosphors. With the introduction of Mn2+, the intensity of all the emission bands was increased, in particular the red band, which was most significant at 40 mol% doping. A possible mechanism for the enhancement of the red emission has been proposed. The prepared UC nanoparticles were functionalized with polyethylene glycol-polyethylene imine co-polymer to make them water dispersible and successfully applied for cancer cell imaging.
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