Upconversion luminescence of NaYF4:Yb,Er nanocrystals with high uniformity

Ye, Yangsen; Jiang, Zhihao; Wang, Qizheng; Zhu, Zishu; Wang, Xiao; Sui, Zhilei; Dai, Rucheng; Wang, Zhongping; Zhang, Zengming; Ding, Zhiyong

doi:10.1016/s1002-0721(14)60144-7

Cited by 27 publications

(7 citation statements)

References 15 publications

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“…This is likely to be due to a better absorption of Er 3+ at 800 nm than at 980 nm or a more efficient UC process upon 800 nm excitation. Further experiments, involving samples codoped with Er 3+ and Yb 3+ , a couple which is well-known for up-conversion, 52 would be necessary to discriminate between these two hypotheses.…”

Section: Resultsmentioning

confidence: 99%

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

et al. 2019

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Pure α-La(IO 3 ) 3 and α-La 0.85 Er 0.15 (IO 3 ) 3 nanocrystals were synthesized by a microwave-assisted hydrothermal method leading to a reaction yield of 87 ± 4%. Electron microscopy and dynamic light scattering characterizations provide evidence for the formation of nanocrystals with an average size of 45 ± 10 nm for α-La(IO 3 ) 3 and 55 ± 10 nm for α-La 0.85 Er 0.15 (IO 3 ) 3 . When dispersed in ethylene glycol, the nanocrystal suspensions exhibit second-harmonic generation under near-infrared excitations at 800 and 980 nm whereas additional photoluminescence by up-conversion is simultaneously observed in the case of α-La 0.85 Er 0.15 (IO 3 ) 3 nanocrystals. Quantitative assessments of the second-harmonic generation efficiency from second-harmonic scattering experiments at 1064 nm result in relatively high ⟨d⟩ coefficients measured at 8.2 ± 2.0 and 8.0 ± 2.0 pm V −1 for α-La(IO 3 ) 3 and α-La 0.85 Er 0.15 (IO 3 ) 3 , respectively. The relative intensity between second-harmonic generation and photoluminescence is discussed following the excitation wavelength.

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Section: Resultsmentioning

confidence: 99%

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

et al. 2019

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“…There were three emission peaks at around 523, 542, and 651 nm, corresponding to the 4 S 3/2 → 4 I 15/2 , 4 F 9/2 → 4 I (15/2) , and 4 F (5/2) → 2 F (7/2) transitions of Er 3+ , respectively. 39 The sharp emission at lower wavelengths and higher energy confirms the efficiency of the upconversion mechanism of the synthesized nanophosphors, which could be successfully used for bioimaging. These groups of nanophosphors find wide applications in tissue imaging using swept-source optical coherence tomography, where the laser source of NIR wavelength is used.…”

Section: Surface and Structural Properties Of Synthesized Nayf 4 :Ybe...mentioning

confidence: 62%

“…Following the continuous excitation at 980 nm, the luminescence spectrum of the NaYF 4 :Yb,Er nanophosphors in water was recorded with capturing digital images of luminescence (Figure 3C‐D). There were three emission peaks at around 523, 542, and 651 nm, corresponding to the 4 S 3/2 → 4 I 15/2 , 4 F 9/2 → 4 I (15/2) , and 4 F (5/2) → 2 F (7/2) transitions of Er 3+ , respectively 39 . The sharp emission at lower wavelengths and higher energy confirms the efficiency of the upconversion mechanism of the synthesized nanophosphors, which could be successfully used for bioimaging.…”

Section: Resultsmentioning

confidence: 99%

Ex vivo interaction study of NaYF₄:Yb,Er nanophosphors with isolated mitochondria

Singh

Chawda

Barkhade

et al. 2021

Biotech and App Biochem

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Ex vivo interaction of NaYF 4 :Yb,Er nanophosphors with isolated mitochondria has been investigated. The nanophosphors were synthesized using the hydrothermal method. The synthesized NaYF 4 :Yb,Er nanophosphors were characterized for physicochemical properties. The NaYF 4 :Yb,Er nanophosphors showed successful upconversion with excitation wavelength lying in the nearinfrared region. The effect of synthesized NaYF 4 :Yb,Er nanophosphors on mitochondria isolated from the chicken heart tissue was examined through ROS generation capacity, membrane fluidity, and complex II activity. The exposer of NaYF 4 :Yb,Er nanophosphors to isolated mitochondria inhibits ROS generation activity as compared to control. The mitochondria membrane fluidity of the lipid bilayer and complex-II activity of mitochondria was observed to be unaltered after the interaction with NaYF 4 :Yb,Er nanoparticles. The results confirm that synthesized NaYF 4 :Yb,Er nanoparticles can be used as a safe contrast agent.

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“…The NaYF 4 :Yb 3+ , Er 3+ UCNPs were prepared based on a solvothermal synthesis technique (Chen et al, 2012;Ye et al, 2014). In short, the mixing of 0.2 mL of 0.1 M Er(NO 3 ) 3 , 1.0 mL During the experiment, the NaYF 4 :Yb 3+ , Er 3+ UCNPs were uniformly dispersed in PBS buffer solution to obtain a 0.1 mg/ mL solution, which was then used in the fluorescence analysis.…”

Section: Synthesis Of Ucnpsmentioning

confidence: 99%

Glucose determination in human serum by applying inner filter effect quenching mechanism of upconversion nanoparticles

Chen¹,

Yang²,

Chen³

et al. 2023

Front. Bioeng. Biotechnol.

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Accurate blood glucose determination is essential to the clinical diagnosis and management of diabetes. This work establishes an inner filter effect (IFE) strategy between upconversion nanoparticles (UCNPs) and quinone-imine complex for glucose monitoring in human serum simply and efficiently. In this system, the enzyme glucose oxidase (GOx) catalyzes the reaction of glucose into hydrogen peroxide (H2O2) and gluconic acid when compulsion by oxygen. In the presence of horseradish peroxidase (HRP), the produced H2O2 can catalytically oxidize phenol and 4-amino antipyrine (4-AAP) to generate quinone-imine products. The purple-colored quinone-imine complex effectively absorbed the fluorescence of NaYF4:Yb3+, Er3+ UCNPs, leading to the strong fluorescence quenching of UCNPs through IFE. Thus, a new approach was established for glucose monitoring by determining the fluorescence intensity. Under the optimal condition, this approach shows better linearity to glucose from 2–240 μmol/L with a low detection limit at 1.0 μmol/L. Owing to the excellent fluorescence property and background-free interference of the UCNPs, the biosensor was applied for glucose measurements in human serum and got a satisfactory result. Furthermore, this sensitive and selective biosensor revealed great potential for the quantitative analysis of blood glucose or different kinds of H2O2-involved biomolecules for the application of clinical diagnosis.

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Upconversion luminescence of NaYF4:Yb,Er nanocrystals with high uniformity

Cited by 27 publications

References 15 publications

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

Ex vivo interaction study of NaYF₄:Yb,Er nanophosphors with isolated mitochondria

Glucose determination in human serum by applying inner filter effect quenching mechanism of upconversion nanoparticles

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Upconversion luminescence of NaYF4:Yb,Er nanocrystals with high uniformity

Cited by 27 publications

References 15 publications

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO3)3 Nanocrystals

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO3)3 Nanocrystals

Ex vivo interaction study of NaYF4:Yb,Er nanophosphors with isolated mitochondria

Glucose determination in human serum by applying inner filter effect quenching mechanism of upconversion nanoparticles

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Product

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Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

Microwave Synthesis and Up-Conversion Properties of SHG-Active α-(La, Er)(IO₃)₃ Nanocrystals

Ex vivo interaction study of NaYF₄:Yb,Er nanophosphors with isolated mitochondria