Tunable Multicolor Upconversion Emissions and Paramagnetic Property of Monodispersed Bifunctional Lanthanide-Doped NaGdF<sub>4</sub> Nanorods

Ren, Guanhua; Zeng, Songjun; Hao, Jianhua

doi:10.1021/jp2064529

Cited by 127 publications

(89 citation statements)

References 46 publications

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“…80 The Gd 3þ relaxivity values increased from 3.0 to 7.2 mM À1 s À1 with decreased particle size. The relaxivity of the 2.5 nm nanoparticles was almost twice than that of the clinical Gd-DTPA (Magnevist [92][93][94][95] In addition, directly introducing Gd 3þ95 and modifying with gadopentetic acid (Gd-DTPA) 96 onto the UCNP surface were also proposed for T 1 -weighted MRI.…”

Section: Ucnps For T 1 -Weighted and T 2 -Weighted Mrimentioning

confidence: 99%

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Fang

Wei

2016

J. Innov. Opt. Health Sci.

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Upconversion nanoparticles (UCNPs) as a promising material are widely studied due to their unique optical properties. The material can be excited by long wavelength light and emit visible wavelength light through multiphoton absorption. This property makes the particles highly attractive candidates for bioimaging and therapy application. This review aims at summarizing the synthesis and modi¯cation of UCNPs, especially the applications of UCNPs as a theranostic agent for tumor imaging and therapy. The biocompatibility and toxicity of UCNPs are also further discussed. Finally, we discuss the challenges and opportunities in the development of UCNP-based nanoplatforms for tumor imaging and therapy.

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Section: Ucnps For T 1 -Weighted and T 2 -Weighted Mrimentioning

confidence: 99%

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Fang

Wei

2016

J. Innov. Opt. Health Sci.

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“…Pure hexagonal-phase Yb 3+ /Tm 3+ /Ho 3+ tri-doped NaGdF 4 nanorods with high monodispersity were successfully achieved via a hydrothermal method using oleic acid as a stabilizing agent and white-light emissions could be tuned from blue-white to white by adjusting the doped contents of Ho 3+ (21 3 and heating in a water bath until the excess HNO 3 was evaporated. Ten milliliters of deionized water was added and the mixture was stirred for 10 min to form Ln (NO 3 ) 3 solution.…”

Section: Introductionmentioning

confidence: 99%

Tunable multicolor and white‐light upconversion luminescence in Yb³⁺/Tm³⁺/Ho³⁺ tri‐doped NaYF₄ micro‐crystals

Lin

Teng

et al. 2014

Luminescence

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NaYF4 micro-crystals with various concentrations of Yb(3+) /Tm(3+) /Ho(3+) were prepared successfully via a simple and reproducible hydrothermal route using EDTA as the chelating agent. Their phase structure and surface morphology were studied using powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD patterns revealed that all the samples were pure hexagonal phase NaYF4. SEM images showed that Yb(3+)/Tm(3+)/Ho(3+) tri-doped NaYF4 were hexagonal micro-prisms. Upconversion photoluminescence spectra of Yb(3+)/Tm(3+)/Ho(3+) tri-doped NaYF4 micro-crystals with various dopant concentrations under 980 nm excitation with a 665 mW pump power were studied. Tunable multicolor (purple, purplish blue, yellowish green, green) and white light were achieved by simply adjusting the Ho(3+) concentration in 20%Yb(3+)/1%Tm(3+)/xHo(3+) tri-doped NaYF4 micro-crystals. Furthermore, white-light emissions could be obtained using different pump powers in 20%Yb(3+)/1%Tm(3+)/1%Ho(3+) tri-doped NaYF4 micro-crystals at 980 nm excitation. The pump power-dependent intensity relationship was studied and relevant energy transfer processes were discussed in detail. The results suggest that Yb(3+)/Tm(3+) Ho(3+) tri-doped NaYF4 micro-crystals have potential applications in optoelectronic devices such as photovoltaic, plasma display panel and white-light-emitting diodes.

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“…Hexagonal phase lanthanidedoped NaGdF 4 nanocrystals (NCs) demonstrated both strong UC photoluminacence (PL) characteristics and efficient quantum cutting performance [13][14][15][16]. Compared with NaYF 4 , which has been a research focus in UC host materials [17][18][19], NaGdF 4 is more energetically stable in hexagonal phase because of the raised formation energy per atom and the increased luminescence lifetime in this phase when Y 3?…”

Section: Introductionmentioning

confidence: 99%

Citric acid-assisted growth of lanthanide ions co-doped one-dimensional upconversion microcrystals and their photovoltaic applications

Cheng

Chen

et al. 2014

J Mater Sci: Mater Electron

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We report for the first time the preparation of Yb 3? -Er 3? co-doped b-phase sodium gadolinium fluoride (NaGdF 4 :Yb/Er) microcrystals using citric acid (CA) as a shape modifier and the application of NaGdF 4 :Yb/Er to amorphous silicon solar cells. The proposed hydrothermal method was facile and eco-friendly. It was found that CA played a critical role in the shape evolution of the final products. The related synthesis mechanisms are discussed. Under 980 nm laser excitation, the optimized NaGdF 4 :Yb/ Er crystals exhibited strong upconversion (UC) emissions at visible wavelengths. Amorphous silicon thin film solar cells were designed and fabricated for investigating different UC configurations. In combination with a metallic back reflector, the cell with the front side UC layer achieved a six-fold improvement of the photocurrent while the cell with the rear side UC layer exhibited a ten-fold enhancement of the photocurrent, under 980 nm light, compared with the cell without upconverter.

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Tunable Multicolor Upconversion Emissions and Paramagnetic Property of Monodispersed Bifunctional Lanthanide-Doped NaGdF₄ Nanorods

Cited by 127 publications

References 46 publications

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Tunable multicolor and white‐light upconversion luminescence in Yb³⁺/Tm³⁺/Ho³⁺ tri‐doped NaYF₄ micro‐crystals

Citric acid-assisted growth of lanthanide ions co-doped one-dimensional upconversion microcrystals and their photovoltaic applications

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Tunable Multicolor Upconversion Emissions and Paramagnetic Property of Monodispersed Bifunctional Lanthanide-Doped NaGdF4 Nanorods

Cited by 127 publications

References 46 publications

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Upconversion nanoparticle as a theranostic agent for tumor imaging and therapy

Tunable multicolor and white‐light upconversion luminescence in Yb3+/Tm3+/Ho3+ tri‐doped NaYF4 micro‐crystals

Citric acid-assisted growth of lanthanide ions co-doped one-dimensional upconversion microcrystals and their photovoltaic applications

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Tunable Multicolor Upconversion Emissions and Paramagnetic Property of Monodispersed Bifunctional Lanthanide-Doped NaGdF₄ Nanorods

Tunable multicolor and white‐light upconversion luminescence in Yb³⁺/Tm³⁺/Ho³⁺ tri‐doped NaYF₄ micro‐crystals