Optimization of the synthesis of nanostructured Tb3+-doped Gd2O3 by in-situ luminescence following up

Ou, Meigui; Mutelet, B.; Martini, M.; Bazzi, Rana; Roux, Stéphane; Ledoux, Gilles; Tillement, Olivier; Perriat, Pascal

doi:10.1016/j.jcis.2009.01.062

Cited by 34 publications

(11 citation statements)

References 41 publications

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“…All chemicals were obtained from Sigma-Aldrich (St Louis, MO, USA) unless otherwise noted. Eu 3þ -doped Gd 2 O 3 nanoparticles were prepared using the polyol method as reported elsewhere (22,28). Briefly, to obtain the Eu 3þ -doped Gd 2 O 3 nanoparticles, 2.85 mmol GdCl 3 Á6H 2 O and 0.15 mmol EuCl 3 Á6H 2 O were added in 20 ml DEG and the mixture was stirred overnight.…”

Section: Synthesis and Surface Modification Of Eu 3r -Doped Gd 2 Omentioning

confidence: 99%

Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling

Shi

Neoh

Kang

et al. 2010

Contrast Media & Molecular

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Magnetic resonance tracking of stem cells has recently become an emerging application for investigating cell-tissue interactions and guiding the development of effective stem cell therapies for regeneration of damaged tissues and organs. In this work, anionic Eu(3+)-doped Gd(2)O(3) hybrid nanoparticles were applied as a contrast agent both for fluorescence microscopy and T(1)-weighted MRI. The nanoparticles were synthesized through the polyol method and further modified with citric acid to obtain anionic nanoparticles. These nanoparticles were internalized into human mesenchymal stem cells (hMSCs) as confirmed by confocal laser scanning microscopy and quantified by inductively coupled plasma-mass spectrometry. MTT assay of the labeled cells showed that the nanoparticles did not possess significant cytotoxicity. In addition, the osteogenic, adipogenic and chondrogenic differentiation of the hMSCs was not influenced by the labeling process. With MRI, the in vitro detection threshold of cells after incubation with nanoparticles at a Gd concentration of 0.5 mM for 2 h was estimated to be about 10 000 cells. The results from this study indicate that the biocompatible anionic Gd(2)O(3) nanoparticles doped with Eu(3+) show promise both as a luminescent and T(1) contrast agent for use in visualizing hMSCs.

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Section: Synthesis and Surface Modification Of Eu 3r -Doped Gd 2 Omentioning

confidence: 99%

Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling

Shi

Neoh

Kang

et al. 2010

Contrast Media & Molecular

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“…17 18 They are also expected to act as surface capping agent to control the growth and prevent inter particle aggregation. 19 It is reported that the rate of NaOH addition is a crucial parameter for the growth of oxide particles. 20 The as-synthesized product was found to be amorphous.…”

Section: Resultsmentioning

confidence: 99%

White Light Emission from Spin Coated Gd<SUB>2</SUB>O<SUB>3</SUB>:Dy Nano Phosphors Synthesized Using Polyol Technique

Bedekar¹,

Dutta²,

Tyagi³

2010

J. Nanosci. Nanotech.

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Water dispersible Gd2O3:Dy3+ (2%) nanophosphors were synthesized through a facile polyol process and characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), Dynamic Light Scattering (DLS) and photoluminescence (PL) spectrophotometry. The results of XRD, TEM and DLS show that resultant nanoparticles are single phasic and have spherical shape with 17 to 22% dispersibility. An efficient energy transfer was observed from host to the dopant ions. Characteristic blue and yellow emissions from Dy3+ ions were observed. The CIE coordinates of the nanophosphor lie in the white light region of the chromaticity diagram. Spin coating of the nanophosphor was done on quartz substrate. Bright white luminescence of this film was observed under ultraviolet light with lamda exc = 310 nm.

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“…Moreover, the luminescent properties of these systems depend on their morphology, size, and synthetic route 8 . There are several methods for preparing Gd 2 O 3 : Eu +3 , such as by the combustion 9 , Pechini 10 , sol-gel 11,12 , polyol 13,14 and hydrothermal 15 methods, as well as others, giving rise to different morphologies and particle sizes, making it possible to modify the intensity of the luminescent emissions.…”

Section: Introductionmentioning

confidence: 99%

F-127-Assisted Sol-Gel Synthesis of Gd2O3:Eu3+ Powders and Films

et al. 2019

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In the current work, the influence of Pluronic F-127 (S = F-127) and temperature on the luminescent properties of Gd 2 O 3 :Eu 3+ (Gd:S = 1:2) powders and films was studied. In order to synthesize the powders and films (by the dip-coating technique), Gd 2 O 3 : Eu 3+ (5 mol%) ceramics were elaborated by the sol-gel route, using gadolinium and europium nitrates as precursors. The results obtained by means of X-ray diffraction, confirmed the presence of the cubic structure of Gd 2 O 3 (in 800 ºC heat-treated powders and 700 ºC heat-treated films), and crystals with nanometer sizes of ~19 nm, and ~15 nm, corresponding to the spherical and laminar-like morphologies of densified powders and films, respectively. Crystallites from the cubic and monoclinic structure were present on Gd 2 O 3 : Eu 3+ -modified films up to 800 ºC. Chemical identification of the bonds present in the films was performed by Fourier transform infrared spectroscopy, which identified representative infrared absorption at 543 cm -1 , attributable to the Gd-O vibration. Photoluminescence studies showed that when the powders and films were heat-treated at 800 ºC, the intensity of their luminescence at the 5 D 0 → 7 F 2 Eu 3+ transition (618 nm) was enhanced by the presence of F-127.

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Optimization of the synthesis of nanostructured Tb3+-doped Gd2O3 by in-situ luminescence following up

Cited by 34 publications

References 41 publications

Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling

Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling

White Light Emission from Spin Coated Gd<SUB>2</SUB>O<SUB>3</SUB>:Dy Nano Phosphors Synthesized Using Polyol Technique

F-127-Assisted Sol-Gel Synthesis of Gd2O3:Eu3+ Powders and Films

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Optimization of the synthesis of nanostructured Tb3+-doped Gd2O3 by in-situ luminescence following up

Cited by 34 publications

References 41 publications

Bifunctional Eu3+‐doped Gd2O3 nanoparticles as a luminescent and T1 contrast agent for stem cell labeling

Bifunctional Eu3+‐doped Gd2O3 nanoparticles as a luminescent and T1 contrast agent for stem cell labeling

White Light Emission from Spin Coated Gd<SUB>2</SUB>O<SUB>3</SUB>:Dy Nano Phosphors Synthesized Using Polyol Technique

F-127-Assisted Sol-Gel Synthesis of Gd2O3:Eu3+ Powders and Films

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Product

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Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling

Bifunctional Eu³⁺‐doped Gd₂O₃ nanoparticles as a luminescent and T₁ contrast agent for stem cell labeling