Journal Article10.1021/JP0342226
Emission Processes in YVO4:Eu Nanoparticles
Arnaud Huignard,Valérie Buissette,‡ Anne-Christine Franville,and Thierry Gacoin,Jean-Pierre Boilot +4 more
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TL;DR: In this article, the luminescence properties of colloidal YVO4:Eu nanoparticles (8 nm in diameter) are investigated and compared to those of the bulk materials.
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Abstract: The luminescence properties of colloidal YVO4:Eu nanoparticles (8 nm in diameter) are investigated and compared to those of the bulk materials. The emission quantum yield of nanoparticles is improved after the transfer of the colloidal particles into D2O, showing that surface OH groups act as efficient quenchers of the Eu3+ emission. The growth of a silicate shell around the nanoparticles decreases the optimum europium concentration, showing that energy transfers within the nanoparticles are limited by the quenching of the excited states of the vanadate groups. Nanoparticles also exhibit structural distortions directly related to the small size of the particles. No clear evidence is found concerning the influence of these distortions on the energy-transfer processes, since the improvement of the emission properties observed after thermal annealing of both crude and silicated powders seems to result mainly from the elimination of Eu3+ and vanadate quenchers from the surface. This latter effect is greatly e...
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Citations
Fluorescence resonance energy transfer using lanthanide-ion doped oxide nanoparticles as donors
Didier Casanova,Domitille Giaume,Tina Amirtha,Thierry Gacoin,Jean-Pierre Boilot,Antigoni Alexandrou +5 more
TL;DR: In this article, the authors demonstrated fluorescence resonance energy transfer (FRET) between lanthanide-ion doped oxide nanoparticles acting as donors and organic acceptor molecules (Cy5) and determined FRET efficiencies as a function of Cy5 concentration which are in very good agreement with a multiple acceptor-multiple donor calculation.
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Tamás Szabó,Ágnes Veres,Eunju Cho,Jeehyeong Khim,Noémi Varga,Imre Dékány +5 more
- 01 Jan 2012
TL;DR: In this article, a series of nanocomposite photocatalysts were prepared from aqueous dispersions of Degussa P25 TiO2 and exfoliated graphite oxide (GO) by heterocoagulation.
LnPO 4 :R E 3+ (La 5 La, Gd; RE 5 Eu, Tb) nanocrystals: solvo-thermal synthesis, microstructure and photoluminescence
Bing YanJianfeng GuXiuzhen Xiao
- 01 Jan 2010
TL;DR: In this paper, a facile solvo-thermal technology was used to obtain the Eu 3? /Tb 3? ions-doped LnPO4 (Ln = La, Gd) phosphors with different particle sizes, micro- structures and morphologies via altering the solvents.
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TL;DR: In this article, a Pechini sol−gel process combined with soft lithography was used to fabricate nanocrystalline YVO4:A (A = Eu3+, Dy3+, Sm3+, Er3+) phosphor films and their patterning were fabricated by a pechini sol-gel process.
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Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors
TL;DR: In this article, the results of X-ray diffraction and electron microscopy characterizations show that the crystalline nanoparticles exhibit an ellipsoidal form with two characteristic dimensions of around 15 and 30 nm.
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