Tunable Luminescence of Sr2CeO4:M2+ (M = Ca, Mg, Ba, Zn) and Sr2CeO4:Ln3+ (Ln = Eu, Dy, Tm) Nanophosphors

Grzyb, Tomasz; Szczeszak, Agata; Rozowska, Justyna; Legendziewicz, J.; Lis, Stefan

doi:10.1021/jp208015z

Cited by 83 publications

(33 citation statements)

References 32 publications

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“…Luminescent nanocrystals (NCs) activated by lanthanide ions (Ln 3+ ) have been the object of intense research in recent years as a direct consequence of their unique properties (Grzyb and Lis 2011; Grzyb et al 2012a, b; Wang et al 2006a, 2010, 2011a; Wiglusz et al 2009; Yan and Yan 2008; Yang et al 2011). Taking advantage of phenomenon such as energy transfer (ET) and the characteristic features of f -electronic transitions, it is possible to obtain efficient luminescence from Ln 3+ -doped materials even when the materials are prepared at nanodimensions.…”

Section: Introductionmentioning

confidence: 99%

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

et al. 2013

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Terbium fluoride nanocrystals, covered by a shell, composed of cerium fluoride were synthesized by a co-precipitation method. Their complex structure was formed spontaneously during the synthesis. The surface of these core/shell nanocrystals was additionally modified by silica. The properties of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals, formed in this way, were investigated. Spectroscopic studies showed that the differences between these two groups of products resulted from the presence of the SiO2 shell. X-ray diffraction patterns confirmed the trigonal crystal structure of TbF3@CeF3 nanocrystals. High resolution transmission electron microscopy in connection with energy-dispersive X-ray spectroscopy showed a complex structure of the formed nanocrystals. Crystallized as small discs, ‘the products’, with an average diameter around 10 nm, showed an increase in the concentration of Tb3+ ions from surface to the core of nanocrystals. In addition to photo-physical analyses, cytotoxicity studies were performed on HSkMEC (Human Skin Microvascular Endothelial Cells) and B16F0 mouse melanoma cancer cells. The cytotoxicity of the nanomaterials was neutral for the investigated cells with no toxic or antiproliferative effect in the cell cultures, either for normal or for cancer cells. This fact makes the obtained nanocrystals good candidates for biological applications and further modifications of the SiO2 shell.Graphical Abstract.

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Section: Introductionmentioning

confidence: 99%

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

et al. 2013

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“…[7][8][9][10][11][12][13][14] Among these phosphors, Dy 3+ has been widely used and prioritized as an activator in a great number of host materials for direct white light emitting. This is because Dy 3+ has two main emissions of yellow ( 4 F 9/2 -6 H 13/2 and blue ( 4 F 9/2 -6 H 15/2 , and the blending of these are usually in white emitting region.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Photoluminescence Characteristics of CaIn₂O₄:Dy³⁺ Phosphors Co-Doped with Gd³⁺, Zn²⁺ or Al³⁺ Ions

Gou¹,

Wang²,

Yu³

et al. 2016

j nanosci nanotechnol

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Novel warm-white emitting phosphors CaIn2O4:Dy3+ co-doped with Gd3+, Zn2+, or Al3+ ions were prepared by solid state reaction. In this paper, a strategy of co-doping with different ions was used with the aim of affecting the luminescence properties of CaIn204:0.6%Dy3+ under NUV excitation. The luminescence intensities of CaIn2O4:0.6%Dy3+ were enhanced by 0.2% Gd3+ or 0.2% Zn2+ ions co-doping under 367 nm excitation, but lowered by co-doping with 0.2% Al3+ ions. Furthermore, the chromaticity coordinates of CaIn2O4:0.6%Dy3+ can be tuned from the cold-white region to warm-white region with Gd3+ or Zn2+ ions co-doping. These findings show that CaIn2O4:0.6%Dy3+,0.2% Gd3+, and CaIn2O4:0.6%Dy3+,0.2% Zn2+ have potential application value as new warm-white LED phosphors.

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“…ions is usually inefficient, because of the forbidden character of the 4f-4f transitions, in these ions. That is why, the energy transfer (ET) and charge transfer (CT) phenomena are often used to increase the luminescence efficiency of such compounds (Grzyb et al , 2012b. Ce 3?…”

Section: Introductionmentioning

confidence: 99%

Synthesis, photophysical analysis, and in vitro cytotoxicity assessment of the multifunctional (magnetic and luminescent) core@shell nanomaterial based on lanthanide-doped orthovanadates

et al. 2015

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Rare earths orthovanadates (REVO 4 ) doped with luminescent lanthanide ions (Ln 3? ) play an important role as promising light-emitting materials. Gadolinium orthovanadate exhibits strong absorption of ultraviolet radiation and as a matrix doped with Eu 3? ions is well known for its efficient and intense red emission, induced by energy transfer from the VO 4 3-groups to Eu 3? ions. In the presented study, Fe 3 O 4 @SiO 2 @GdVO 4 :Eu 3? 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 REVO 4 doped with Ln 3? . Moreover, the studied NPs did not affect erythrocyte sedimentation rate, cell membrane permeability, and morphology of human red blood cells.

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Tunable Luminescence of Sr₂CeO₄:M²⁺ (M = Ca, Mg, Ba, Zn) and Sr₂CeO₄:Ln³⁺ (Ln = Eu, Dy, Tm) Nanophosphors

Cited by 83 publications

References 32 publications

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

Synthesis and Photoluminescence Characteristics of CaIn₂O₄:Dy³⁺ Phosphors Co-Doped with Gd³⁺, Zn²⁺ or Al³⁺ Ions

Synthesis, photophysical analysis, and in vitro cytotoxicity assessment of the multifunctional (magnetic and luminescent) core@shell nanomaterial based on lanthanide-doped orthovanadates

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Tunable Luminescence of Sr2CeO4:M2+ (M = Ca, Mg, Ba, Zn) and Sr2CeO4:Ln3+ (Ln = Eu, Dy, Tm) Nanophosphors

Cited by 83 publications

References 32 publications

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

Structural, spectroscopic and cytotoxicity studies of TbF3@CeF3 and TbF3@CeF3@SiO2 nanocrystals

Synthesis and Photoluminescence Characteristics of CaIn2O4:Dy3+ Phosphors Co-Doped with Gd3+, Zn2+ or Al3+ Ions

Synthesis, photophysical analysis, and in vitro cytotoxicity assessment of the multifunctional (magnetic and luminescent) core@shell nanomaterial based on lanthanide-doped orthovanadates

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Tunable Luminescence of Sr₂CeO₄:M²⁺ (M = Ca, Mg, Ba, Zn) and Sr₂CeO₄:Ln³⁺ (Ln = Eu, Dy, Tm) Nanophosphors

Synthesis and Photoluminescence Characteristics of CaIn₂O₄:Dy³⁺ Phosphors Co-Doped with Gd³⁺, Zn²⁺ or Al³⁺ Ions