Erbium-activated modified silica glasses with high 4I13/2 luminescence quantum yield

2006 ◽  
Vol 28 (11) ◽  
pp. 1325-1328 ◽  
Author(s):  
S.N.B. Bhaktha ◽  
B. Boulard ◽  
S. Chaussedent ◽  
A. Chiappini ◽  
A. Chiasera ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Luminescence Quantum Yield ◽  
Modified Silica ◽  
Silica Glasses

Synthesis of CdS-Capped CdSe Nanocrystals without any Poisonous Materials

2014 ◽  
Vol 981 ◽  
pp. 806-809
Author(s):  
Wu Lei Zhou ◽  
Tuo Cai ◽  
Yun Chen ◽  
Xuan Lin Chen ◽  
Yu Qiu Qu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Yield ◽  
Aqueous Medium ◽  
Laser Irradiation ◽  
Absorption Spectroscopy ◽  
Photoluminescence Spectroscopy ◽  
Luminescence Quantum Yield ◽  
Cdse Nanocrystals ◽  
Core Shell ◽  
Photo Stability

CdS-capped CdSe nanocrystals (NCs) which show high luminescence quantum yield are synthesized without any Poisonous Materials in aqueous solution. The synthesis in an aqueous medium without any poisonous materials is attached importance to. The absorption spectroscopy and photoluminescence spectroscopy are employed to analyze the NCs. It takes 78s that the intensity decreases to the half for bare CdSe NCs, but 442s for CdSe/CdS core/shell NCs. The photo stability of CdSe NCs under 325nm laser irradiation is enhanced greatly after CdS overcoating.

scholarly journals Favourable influence of hydrophobic surfaces on protein structure in porous organically-modified silica glasses

Biomaterials ◽  
2008 ◽  
Vol 29 (18) ◽  
pp. 2710-2718 ◽  
Author(s):  
Bouzid Menaa ◽  
Mar Herrero ◽  
Vicente Rives ◽  
Mayya Lavrenko ◽  
Daryl K. Eggers
Keyword(s):  
Protein Structure ◽  
Modified Silica ◽  
Hydrophobic Surfaces ◽  
Silica Glasses ◽  
Organically Modified ◽  
Organically Modified Silica

Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield

2016 ◽  
Vol 128 (19) ◽  
pp. 5843-5847 ◽  
Author(s):  
Giada Soldan ◽  
Maha A. Aljuhani ◽  
Megalamane S. Bootharaju ◽  
Lina G. AbdulHalim ◽  
Manas R. Parida ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Silver Nanoclusters ◽  
Luminescence Quantum Yield ◽  
Gold Doping

Synthesis and luminescence properties of colloidal lanthanide doped YVO4

2001 ◽  
Vol 667 ◽  
Author(s):  
Arnaud Huignard ◽  
Thierry Gacoin ◽  
Frédéric Chaput ◽  
Jean-Pierre Boilot ◽  
Patrick Aschehoug ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Room Temperature ◽  
Sol Gel ◽  
Precursor Solution ◽  
Silica Matrix ◽  
Luminescence Quantum Yield ◽  
Colloidal Solutions ◽  
Silicon Alkoxide ◽  
Crystalline Defects ◽  
Hydroxylated Surface

ABSTRACTAqueous colloidal solutions of well dispersed YVO4:Ln (Ln = Eu, Nd) nanoparticles are synthesized through precipitation reactions at room temperature. In the case of YVO4:Eu, a luminescence quantum yield of 15% is found, which is not as high as in the bulk due to the existence of residual crystalline defects and nonradiative relaxations from the hydroxylated surface. Appropriate hydrothermal annealing and deuteration of the surface allow to rise the yield up to 38%. Incorporation of the nanocrystals into a transparent silica matrix is achieved through preliminary coating of the particles with a functionnalized silicon alkoxide and further dispersion into a sol-gel precursor solution. Such sol-gel materials doped with YVO4:Nd nanocrystals are transparent and exhibit the typical emission at 1.06 μm of the Nd3+ ion.

Unusual Capping Chalcogenide Dependence of the Luminescence Quantum Yield of the Hexarhenium(III) Cyano Complexes [Re6(μ3-E)8(CN)6]4−, E2−= Se2−> S2−> Te2−

1999 ◽  
Vol 28 (10) ◽  
pp. 1121-1122 ◽  
Author(s):  
Takashi Yoshimura ◽  
Shoji Ishizaka ◽  
Yoichi Sasaki ◽  
Haeng-Boo Kim ◽  
Noboru Kitamura ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Luminescence Quantum Yield ◽  
Cyano Complexes

Facile synthesis of monodisperse SrAl2O4:Eu2+ cage-like microspheres with an excellent luminescence quantum yield

2018 ◽  
Vol 6 (13) ◽  
pp. 3346-3351 ◽  
Author(s):  
Jun Wan ◽  
Yuting Zhang ◽  
Yuan Wang ◽  
Ronghua Ma ◽  
Yimin Wu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Quantum Yield ◽  
Sol Gel ◽  
Subsequent Heat Treatment ◽  
Luminescence Quantum Yield ◽  
Facile Synthesis

SrAl2O4:Eu2+ cage-like microspheres are prepared by a sol–gel route and subsequent heat treatment. The optimum quantum yield of the cage-like microspheres is 94.94%.

Absolute luminescence quantum yield for nanosized carbon particles in water as a function of excitation wavelength

2020 ◽  
Vol 229 ◽  
pp. 117879 ◽  
Author(s):  
Kirill A. Laptinskiy ◽  
Sergey A. Burikov ◽  
Svetlana V. Patsaeva ◽  
Igor I. Vlasov ◽  
Olga A. Shenderova ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Luminescence Quantum Yield ◽  
Excitation Wavelength ◽  
Carbon Particles

A simple 2,6-diphenylpyridine-based fluorescence “turn-on” chemosensor for Ag+ with a high luminescence quantum yield

2017 ◽  
Vol 141 ◽  
pp. 202-208 ◽  
Author(s):  
Yuan Zhang ◽  
Dehui Wang ◽  
Changliang Sun ◽  
Huiyan Feng ◽  
Dezhi Zhao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Luminescence Quantum Yield ◽  
Turn On ◽  
Fluorescence Turn On
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