Syntheses of optically efficient (La1−x−yCexTby)F3 nanocrystals via a hydrothermal method

Wang, Qiang; You, Yumin; Ludescher, Richard D.; Ju, Yiguang

doi:10.1016/j.jlumin.2010.01.028

Cited by 22 publications

(17 citation statements)

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“…1. All peaks were matched with the JCPDS file of LaF 3 crystal (JCPDS 32-0483), and the XRD pattern was in good agreement with the previously reported studies (Wang et al 2010;Li et al 2011). From the XRD studies, the diffraction pattern reveals that the nanoparticles are polycrystalline with tetragonal structure, and the calculated lattice parameters a = b = 4.110 Å and c = 5.111 Å (d spacing of 2.53 Å at (111) plane) were found to be smaller than that of undoped LaF 3 nanoparticles (a = b = 4.111 and c = 5.122).…”

Section: Resultssupporting

confidence: 88%

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

et al. 2015

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The luminescent lanthanide-doped nanoparticles have gathered considerable attention in many fields especially in biomedicine. In this work, the lanthanum fluoride-doped terbium nanoparticles (LaF 3 :Tb 3? NPs) via simple chemical precipitation method has been synthesized and functionalized with polyethylene glycol. The size and the shape of the nanoparticles are confirmed using X-ray diffraction and transmission electron microscopy. The conjugation of 5-Fluorouracil (5-FU) and thus synthesized nanoparticles (NPs) were confirmed using various spectroscopic methods such as UVVisible spectroscopy, fluorescence steady state, and excited state spectroscopy studies. The enhancement in fluorescence emission (k = 543 nm) of drug-conjugated nanoparticles confirms the Vander Waals force of attraction due to F-F bonding between the drug and the nanoparticles. Further, the effects of 5FU-NPs in carrier protein were investigated using bovine serum albumin as a protein model. The 5FU-LaF 3 :Tb 3? nanoparticles binding is illustrated with binding constant and number of binding sites. The structural change of bovine serum albumin has been studied using circular dichroism and Fourier transform infrared spectroscopy analysis. Graphical AbstractKeywords Lanthanum fluoride Á 5-Fluorouracil Á Serum albumin Á Fluorescence quenching Á Vander Waal force of attraction

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Section: Resultssupporting

confidence: 88%

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

et al. 2015

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“…It is well known that the rare earth doped LaF 3 nanophosphor exhibits efficient room temperature emission from the UV to the mid-IR. LaF 3 host matrix was doped with different RE ions such as Eu 3+ [3,7,8], Nd 3+ [1,9], Ce 3+ [10], Er 3+ [11] and co-doped with Ce 3+ and Tb 3+ [4,6,12], Yb 3+ and Ho 3+ [13]. It is surprising that Sm 3+ is one of the most popular RE ions, which is used extensively in optical devices; but in the existing literature, work on the luminescent property of Sm 3+ ions doped in LaF 3 is…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and Energy Transfer Between Sm <sup>3+</sup> Ions in LaF<sub>3</sub> Nanocrystals Prepared by Hydrothermal Method

Ha¹

2016

IJMSA

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The aim of this research is to study photoluminescent properties and particularly energy transfer between Sm 3+ ions in LaF 3 nanocrystals because the energy transfer process has a significant effect on the luminescence efficiency and lifetime. Sm 3+-doped LaF 3 nanocrystals with 0.1, 0.2, 0.3, 1.0, 2.0, 3.0, 4.0 and 5.0 mol% Sm 3+ have been prepared by hydrothermal method. The obtained nanocrystals were characterized by X-ray diffraction, transmission electron microscopy, photoluminescence and luminescence decay measurement. The results showed that the LaF 3 :Sm 3+ nanocrystals possess hexagonal structure with 3 1 space group. The room temperature photoluminescence and photoluminescence excitation spectra of LaF 3 :Sm 3+ were investigated in detail and interpreted by optical intra-configurational f-f transitions within Sm 3+ ions. When Sm 3+ ion concentration in the nanocrystals is increased, the excitation energy is transferred from the "bulk" Sm 3+ ions to the surface Sm 3+ ions followed by non-radiative recombination at centers at the surface of the nanocrystals. The photoluminescence decay curves of 593 nm peak in the LaF 3 nanocrystals doped with 1.0-5.0 mol% Sm 3+ were best fitted to the Inokuti-Hirayama model with the dominant dipole-quadrupole interaction (S = 8). The values of fitting parameters for the energy transfer process were determined.

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“…Among different RE compounds, lanthanum trifluoride (LaF 3 ) is chosen as a model matrix because it shows chemical stability and low vibrational energy (∼350 cm −1 ) which minimizes nonradiative phonon-assisted quenching of the excited states of the dopant ions [18]. For this reason, LaF 3 is considered as a good host material for phosphors.…”

Section: Introductionmentioning

confidence: 99%

LaF3 nanoparticles surface modified with tryptophan and their optical properties

Сафронихин¹,

Ehrlich²,

Лисичкин³

2014

Applied Surface Science

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Syntheses of optically efficient (La1−x−yCexTby)F3 nanocrystals via a hydrothermal method

Cited by 22 publications

References 45 publications

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

Photoluminescence and Energy Transfer Between Sm <sup>3+</sup> Ions in LaF<sub>3</sub> Nanocrystals Prepared by Hydrothermal Method

LaF3 nanoparticles surface modified with tryptophan and their optical properties

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Syntheses of optically efficient (La1−x−yCexTby)F3 nanocrystals via a hydrothermal method

Cited by 22 publications

References 45 publications

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

Synthesis of 5-Fluorouracil conjugated LaF3:Tb3+/PEG-COOH nanoparticles and its studies on the interaction with bovine serum albumin: spectroscopic approach

Photoluminescence and Energy Transfer Between Sm &lt;sup&gt;3+&lt;/sup&gt; Ions in LaF&lt;sub&gt;3&lt;/sub&gt; Nanocrystals Prepared by Hydrothermal Method

LaF3 nanoparticles surface modified with tryptophan and their optical properties

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Photoluminescence and Energy Transfer Between Sm <sup>3+</sup> Ions in LaF<sub>3</sub> Nanocrystals Prepared by Hydrothermal Method