Effect of Ce3+ dopant ions on the shape and luminescence of YPO4:Eu3+ and YPO4:Tb3+ nanocrystals

Du, Guang; Guo, Weiwei; Al-zyadi, Jabbar M. Khalaf; Liu, Peng; Liu, Zuli

doi:10.1007/s11051-013-1619-0

Cited by 16 publications

(6 citation statements)

References 24 publications

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“…Rare earth phosphates (Di et al 2011) represent an important class of materials and constitute good host matrixes for doping of other luminescent rare earth activator ions (Du et al 2013;Rambabu et al 2003;Rodriguez-Liviano et al 2011;de Sousa Filho and Serra 2010) and find a wide range of applications, such as in optoelectronic devices, magnets, catalysts, fluorescent labels and as active components of various other functional materials (Di et al 2010(Di et al , 2005Rao 2005;Riwotzki et al 2001;Zhang et al 2011). As such, much effort on the phosphates has recently been devoted to developing simple but novel synthetic strategies and their new potential in applications.…”

Section: Introductionmentioning

confidence: 99%

Dispersible crystalline nanobundles of YPO4 and Ln (Eu, Tb)-doped YPO4: rapid synthesis, optical properties and bio-probe applications

2015

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Undoped and Ln 3? (Eu and Tb)-doped crystalline nanobundles of YPO 4 were prepared by a facile microwave-assisted route with water as a solvent and without using any surfactant. TEM investigations reveal that the as-prepared powder consists of lenticular-shaped nanobundles (*100 nm in diameter) made of very small nanorods with diameter less than 10 nm and length varying from 20 to 50 nm. Each nanorod in turn is single crystalline, as revealed by HRTEM imaging. The as-prepared nanobundles are easily dispersible in various solvents, especially water, without any surface functionalization, which is critical for various bio-probe applications like cell and tissue imaging. The Euand Tb-doped YPO 4 nanobundles show good photoluminescence properties and were further evaluated for their use as fluorescent biolabels. Our results show that HeLa cells labelled with Eu-and Tb-doped YPO 4 nanobundles show bright red (Eu) and green (Tb) intracellular luminescence under a confocal microscope. Concentration-and time-dependent MTT cell viability assays show that the nanobundles show low toxicity towards cells which makes them promising in bioimaging field.

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Section: Introductionmentioning

confidence: 99%

Dispersible crystalline nanobundles of YPO4 and Ln (Eu, Tb)-doped YPO4: rapid synthesis, optical properties and bio-probe applications

2015

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“…In particular, Eu 3+ ions-doped oxide NPs have shown unique luminescent properties, owing to different possible narrowband luminescence excitation pathways. The Eu 3+ ions have been excited by either direct 4f-4f electronic transitions in Eu 3+ ions, through the host matrix absorption, Eu–O charge transfer, indirect Gd 3+ or Ce 3+ ions absorption, or even with the sensitization through the organic ligands attached to the NPs surface (Chen et al 2013; Du et al 2013; Grzyb et al 2013; Kumar et al 2013; Liu et al 2006). As a result, the Eu 3+ ions-doped oxide NPs showed intense, narrowband luminescence with excited state lifetimes up to 1 ms, suitable for applications as red emitting phosphors (Blasse 1994).…”

Section: Introductionmentioning

confidence: 99%

Morphology- and size-dependent spectroscopic properties of Eu3+-doped Gd2O3 colloidal nanocrystals

et al. 2014

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The synthesis, morphological characterization, and optical properties of colloidal, Eu(III) doped Gd2O3 nanoparticles with different sizes and shapes are presented. Utilizing wet chemical techniques and various synthesis routes, we were able to obtain spherical, nanodisk, nanotripod, and nanotriangle-like morphology of Gd2O3:Eu3+ nanoparticles. Various concentrations of Eu3+ ions in the crystal matrix of the nanoparticles were tested in order to establish the levels at which the concentration quenching effect is negligible. Based on the luminescence spectra, luminescence lifetimes and optical parameters, which were calculated using the simplified Judd–Ofelt theory, correlations between the Gd2O3 nanoparticles morphology and Eu3+ ions luminescence were established, and allowed to predict the theoretical maximum quantum efficiency to reach from 61 to 98 %. We have also discussed the impact of the crystal structure of Gd2O3 nanoparticles, as well as coordinating environment of luminescent ions located at the surface, on the emission spectra. With the use of a tunable femtosecond laser system and the Z-scan measurement technique, the values of the effective two-photon absorption cross-section in the wavelength range from 550 to 1,200 nm were also calculated. The nonlinear optical measurements revealed maximum multi-photon absorption in the wavelength range from 600 to 750 nm.

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“…No emission from the higher 5 D 3 level is observed due to a cross relaxation effect at the high Tb 3 þ concentration [18]. Based on the above excitation and emission spectra, previous studies of the energy transfer in Ce 3 þ /Tb 3 þ codoped compounds [19,20], and energy level matching conditions, possible excitation and emission processes as well as the energy transfer process are proposed (Fig. 6).…”

Section: Wavelength(nm)mentioning

confidence: 76%

A new one-pot strategy to LaF3:Ce,Tb@SiO2 core-shell nanostructures

Liu

Sun

Zhang

et al. 2015

Solid State Communications

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Effect of Ce3+ dopant ions on the shape and luminescence of YPO4:Eu3+ and YPO4:Tb3+ nanocrystals

Cited by 16 publications

References 24 publications

Dispersible crystalline nanobundles of YPO4 and Ln (Eu, Tb)-doped YPO4: rapid synthesis, optical properties and bio-probe applications

Dispersible crystalline nanobundles of YPO4 and Ln (Eu, Tb)-doped YPO4: rapid synthesis, optical properties and bio-probe applications

Morphology- and size-dependent spectroscopic properties of Eu3+-doped Gd2O3 colloidal nanocrystals

A new one-pot strategy to LaF3:Ce,Tb@SiO2 core-shell nanostructures

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