Synthesis and Characterization of Gd2O3:Eu Nano Phosphors for Application as X-ray Image Detectors

Kim, So-Yeong; Cho, Sung-Ho; Shin, Jung Woog; Park, Ji-Koon; Kang, Sang-Sik; Nam, Sang-Hee

doi:10.3938/jkps.50.1774

Cited by 12 publications

(8 citation statements)

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“…Energy is therefore delivered to quantum centers on the surface of the NPs, leading to fluorescence quenching. 39 A more detailed mechanism requires further research. The Tb doping concentration effect on the lifetime decay spectra is shown in An in vivo MRI experiment was also performed with several groups of mice.…”

Section: Tb Doping Concentration Effects On Fluorescence and Mr Imagingmentioning

confidence: 99%

Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Chen

Yang

et al. 2015

Phys. Chem. Chem. Phys.

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Dual-modal lanthanide-doped gadolinium nanoparticles (NPs), which exhibit an excellent magnetic resonance imaging (MRI) spatial resolution and high fluorescence imaging (FI) sensitivity, have attracted tremendous attention in biotechnology and nanomedicine applications. In this paper, terbium (Tb) ion doped gadolinium oxide (Gd2O3:Tb) NPs with varied Tb concentrations were synthesized by a laser ablation in liquid (LAL) method. The characterization of the structure, morphology, and composition shows that these NPs are spherical with excellent crystallinity. The effects of Tb ion concentration on the visible green fluorescence and longitudinal relaxivity were investigated, indicating that the fluorescence properties were significantly influenced by the Tb ion concentration, but all samples were still efficient T1-weighted contrast agents. Furthermore, the optimum Tb doping concentration was determined to be 1%. The cell viability, cellular fluorescence imaging and in vivo MRI of this dual-modal nano-probe were studied, with the results revealing that the Gd2O3:Tb NPs did not have a significant cytotoxic effect, making them good candidates for use as a dual-modal contrast agent for MRI and fluorescence imaging.

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Section: Tb Doping Concentration Effects On Fluorescence and Mr Imagingmentioning

confidence: 99%

Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Chen

Yang

et al. 2015

Phys. Chem. Chem. Phys.

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“…Luminescent materials have obtained practical applications in almost all devices relating to light. Fluorescent lamps, [1][2][3] cathode ray tubes 4,5 and X-ray detectors 6,7 are well-known examples of such applications. Three color phosphors which are used most extensively in fluorescent lamps are composed of Y 2 O 3 : Eu 3+ (red), MgAl 12 O 19 : Ce 3+ , Tb 3+ (green) and BaMg 2 Al 16 O 27 : Eu 2+ (blue).…”

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confidence: 99%

Intense Green-Emission and Energy Transfer in Phosphor LiGd(PO₃)₄: Ce³⁺, Tb³⁺

Chen

et al. 2012

ECS J. Solid State Sci. Technol.

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Ce3+ and Tb3+ doped LiGd(PO3)4 (LGP-CT) were synthesized with solid state reactions. The luminescence properties of Gd3+, Ce3+ and Tb3+ in LGP and energy transfer (ET) among these ions were investigated in detail. ET in Gd3+-Ce3+ and Gd3+-Tb3+ pairs is bidirectional. The luminescence lifetimes of Ce3+ and ET efficiency prove that unidirectional ET from Ce3+ to Tb3+ is very efficient. Efficient ET from Ce3+ to Tb3+ makes LGP-CT a promising green phosphor for fluorescent lamps. Optimized composition was experimentally determined to be 0.15 and 0.20 mol for Ce3+ and Tb3+, respectively. The integrated green emission intensity of LGP-Ce0.15T0.20 is 61.3% of commercial green phosphor LaPO4: Ce3+0.15, Tb3+0.20. However, synthesis temperature of the former is 500K lower than the latter. This provides LGP-CT an obvious advantage in the competition of commercial green phosphor for fluorescent lamps.

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“…There is a persistent interest in rare-earth doped lanthanide oxides for a large number of optical applications such as for X-ray imaging [1], field emission or electroluminescent displays [2], optical amplifiers, and sensing technologies [3]. More recently, these oxides have been intensively investigated as emerging materials for fluorescent labeling due to their large Stokes shift, narrow emission spectra, long luminescence lifetime, low toxicity, and the flexibility of their excitation wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of cubic and monoclinic Gd2O3:Eu phosphors prepared by flame spray pyrolysis

Iwako

Akimoto

Omiya

et al. 2010

Journal of Luminescence

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Synthesis and Characterization of Gd2O3:Eu Nano Phosphors for Application as X-ray Image Detectors

Cited by 12 publications

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Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Intense Green-Emission and Energy Transfer in Phosphor LiGd(PO₃)₄: Ce³⁺, Tb³⁺

Photoluminescence of cubic and monoclinic Gd2O3:Eu phosphors prepared by flame spray pyrolysis

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Synthesis and Characterization of Gd2O3:Eu Nano Phosphors for Application as X-ray Image Detectors

Cited by 12 publications

References 0 publications

Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Terbium-doped gadolinium oxide nanoparticles prepared by laser ablation in liquid for use as a fluorescence and magnetic resonance imaging dual-modal contrast agent

Intense Green-Emission and Energy Transfer in Phosphor LiGd(PO3)4: Ce3+, Tb3+

Photoluminescence of cubic and monoclinic Gd2O3:Eu phosphors prepared by flame spray pyrolysis

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Intense Green-Emission and Energy Transfer in Phosphor LiGd(PO₃)₄: Ce³⁺, Tb³⁺