A Review: X‐ray excited luminescence of Gadolinium based optoelectronic phosphors

Luminescence ◽  
2021 ◽  
Author(s):  
J. G. Mahakhode ◽  
Amol Nande ◽  
S. J. Dhoble
Keyword(s):  
X Ray ◽  
Excited Luminescence

Transparent glass ceramics containing Lu6 O5 F8 :Tb3+ nano-crystals: Enhanced photoluminescence and X-ray excited luminescence

2017 ◽  
Vol 101 (4) ◽  
pp. 1585-1591 ◽  
Author(s):  
JiangKun Cao ◽  
WeiPing Chen ◽  
DengKe Xu ◽  
XiaoMan Li ◽  
RongFei Wei ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Transparent Glass ◽  
X Ray ◽  
Enhanced Photoluminescence ◽  
Excited Luminescence

pH induced size tuning of Gd2Hf2O7:Eu3+ nanoparticles and its effect on their UV and X-ray excited luminescence

2020 ◽  
Vol 228 ◽  
pp. 117605 ◽  
Author(s):  
Santosh K. Gupta ◽  
Mitzy A. Penilla Garcia ◽  
Jose P. Zuniga ◽  
Yuanbing Mao
Keyword(s):  
X Ray ◽  
Excited Luminescence

Microstructure and Spectroscopy of Lu2O3:Eu Prepared Using Various Synthesis Techniques

2004 ◽  
Vol 99-100 ◽  
pp. 25-30 ◽  
Author(s):  
E. Zych ◽  
J. Trojan-Piegza ◽  
L. Kępiński ◽  
P. Dorenbos
Keyword(s):  
Uniform Distribution ◽  
Spherical Particles ◽  
Nanocrystalline Powders ◽  
Nanocrystalline Powder ◽  
Homogeneous Precipitation ◽  
Uniform Size ◽  
X Ray ◽  
Methods Of Synthesis ◽  
Excited Luminescence ◽  
Subsequent Decomposition

Nanocrystalline powders of Lu2O3:Eu with activator content varying between 0.2%-10% were prepared using four different methods of synthesis. The products differed in their microstructure and crystallites sizes. Combustion of Lu(NO3)3 with urea produced strongly agglomerated material, most probably with significantly non-uniform distribution of the Eu3+ dopant. Replacing urea with glycine for the combustion produced only slightly agglomerated, voluminous, fluffy powder. Applying the Pechini technique resulted in significantly agglomerated powder while the homogeneous precipitation of Lu(OH)3 with urea at 90 °C and its subsequent decomposition to Lu2O3 at 650 °C resulted in a powder of perfectly spherical particles with a uniform size of about 130 nm with very low agglomeration. The efficiency of X-ray excited luminescence of our nanocrystalline Lu2O3:5%Eu was compared to that of the commercial microcrystalline Gd2O2S:Eu. It was found that the commercial phosphor performed four times more efficiently than our nanocrystalline powder. We consider this to be rather encouraging as the fabrication of our powder is not optimized yet. It seems that Lu2O3:Eu, even in nanocrystalline form, can perform much more efficiently which would make it a promising X-ray phosphor.

Elemental and magnetic sensitive imaging using x-ray excited luminescence microscopy

2012 ◽  
Vol 83 (7) ◽  
pp. 073701 ◽  
Author(s):  
R. A. Rosenberg ◽  
S. Zohar ◽  
D. Keavney ◽  
R. Divan ◽  
D. Rosenmann ◽  
...  
Keyword(s):  
Luminescence Microscopy ◽  
X Ray ◽  
Excited Luminescence

Self-trapping of the d-d charge transfer exciton in bulk NiO evidenced by X-ray excited luminescence

JETP Letters ◽  
2012 ◽  
Vol 95 (10) ◽  
pp. 528-533 ◽  
Author(s):  
V. I. Sokolov ◽  
V. A. Pustovarov ◽  
V. N. Churmanov ◽  
V. Yu. Ivanov ◽  
N. B. Gruzdev ◽  
...  
Keyword(s):  
Charge Transfer ◽  
X Ray ◽  
Self Trapping ◽  
Excited Luminescence

Enhanced X-ray excited luminescence of Ga- and In-doped ZnO nanorods by hydrogen annealing

2017 ◽  
Vol 86 ◽  
pp. 173-177 ◽  
Author(s):  
Qianli Li ◽  
Xiaolin Liu ◽  
Mu Gu ◽  
Shiming Huang ◽  
Juannan Zhang ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Hydrogen Annealing ◽  
X Ray ◽  
Doped Zno ◽  
Excited Luminescence

X-ray excited luminescence of Sr1−xEuxF2+x solid solutions

2000 ◽  
Vol 64 (3) ◽  
pp. 265-268
Author(s):  
K Somaiah ◽  
S Nakamura ◽  
K Inabe ◽  
G Ramesh Babu ◽  
P Veeresham
Keyword(s):  
Solid Solutions ◽  
X Ray ◽  
Excited Luminescence

scholarly journals X-ray excited luminescence spectroscopy and imaging with NaGdF4:Eu and Tb

RSC Advances ◽  
2021 ◽  
Vol 11 (50) ◽  
pp. 31717-31726
Author(s):  
Meenakshi Ranasinghe ◽  
Md. Arifuzzaman ◽  
Apeksha C. Rajamanthrilage ◽  
W. R. Willoughby ◽  
Ashley Dickey ◽  
...  
Keyword(s):  
High Resolution ◽  
Light Intensity ◽  
Visible Light ◽  
Luminescence Spectroscopy ◽  
Beam Position ◽  
X Ray ◽  
High Resolution Images ◽  
Excited Luminescence

We synthesized and characterized Eu and Tb doped NaGdF4 nanophosphors which generate visible light when excited by a focused X-ray beam. High resolution images were acquired through tissue by measuring light intensity vs. X-ray beam position.

The Influence of Hydrophilic Decoration on X-ray Excited Luminescence Nanoparticles to Singlet Oxygen Production

NANO ◽  
2020 ◽  
Vol 15 (07) ◽  
pp. 2050092
Author(s):  
Xiaosheng Zhu ◽  
Yi Tian ◽  
Lei Dai ◽  
Qiaofeng Wang ◽  
Mei Shi ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Exchange Reaction ◽  
X Ray ◽  
Good Biocompatibility ◽  
Place Exchange ◽  
High Concentrations ◽  
Excited Luminescence ◽  
Tumor Inhibition Rate

(1) Background: Though X-ray excited photodynamic therapy (X-PDT) breakthrough the bottom neck of PDT application in deep tumor by overcoming light penetration depth limitation, the quantum yield of the hydrophilic X-PDT nanoparticles (NPs) still hampered its further application in vivo. Thus, establishing a proper hydrophilic decoration method which can maximally maintain the quantum yield of X-ray excited luminescent NPs is of urgent demand. (2) Methods: We synthesized NaGdF4: [Formula: see text] (NGF) as X-ray excited luminescent NPs and conducted hydrophilic decoration by two hydrophilic ligands, polyethylene glycol-NH2 (PEG) and cysteamine (Cy) via place exchange reaction, and coupled with photosensitizer (MC540) to form a X-PDT nanosystem. We also conducted experiments in vitro and in vivo to evaluate the efficacy of the X-PDT system. (3) Results: Both PEG and Cy decoration NPs presented excellent emission intensity, which could well excite the coupled photosensitizer MC540 to generate significant X-PDT efficacy under low-dose X-ray radiation. Especially for the NGF-Cy-MC540 treatment group, the cell viability reduced to [Formula: see text]% under 0.3[Formula: see text]Gy radiation and [Formula: see text]% under only 0.1[Formula: see text]Gy radiation, which is the lowest radiation dosage in the literature reports so far. In vivo experiment showed about 36% of tumor inhibition rate under 0.3[Formula: see text]Gy X-ray. Besides, no biotoxicity was observed in NGF groups even in high concentrations, demonstrating good biocompatibility. (4) Conclusions: The hydrophilic decoration method by Cy or PEG via place exchange reaction may pave a brand new way and strategy for X-PDT further clinical application.

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