Surface crystallization enhanced upconversion luminescence in NaGdF4:Yb,Er@NaYF4 core/shell nanocrystals

Wu, Shihong; Zhan, Shiping; Cheng, Shengbin; Dong, Biao; Wu, Xiaofeng; Liu, Yunxin

doi:10.1016/j.jallcom.2022.166555

Cited by 7 publications

(2 citation statements)

References 26 publications

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“…In recent years, researchers have explored various immunological markers as alternatives to colloidal gold in LFIA to improve sensitivity. These markers include conversion luminous materials, quantum dot microspheres, magnetic nanoparticles, and more. − Quantum dots (QDs) have emerged as promising markers due to their excellent properties, such as good photostability and high fluorescence intensity. QD-based LFIA has the potential to provide high sensitivity and quantitative analysis capabilities .…”

Section: Introductionmentioning

confidence: 99%

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

Wang,

Li,

Liu

et al. 2024

Anal. Chem.

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Human respiratory adenovirus (ADV) is a highly infectious respiratory virus with potential for pandemics. There are currently no specific drugs to treat ADV worldwide, so early rapid detection of ADV infection is essential. In this study, we developed an innovative magnetic-optical triple-mode lateral flow immunoassay (LFIA) using magnetic quantum dots as immunomarkers. This novel approach addresses the need for rapid and accurate ADV detection, allowing for multimodal quantitative/semiquantitative analysis of magnetic, fluorescent, and visible signals within a mere 15 min. The lower limit of detection (LOD) for magnetic, fluorescent, and visual signals was determined to be 5.6 × 10 3 , 1.2 × 10 3 , and 1.95 × 10 4 copies/mL, respectively. The detection range for ADV using this approach was 1.2 × 10 3 −5 × 10 7 copies/mL. Additionally, semiquantitative analysis, which is user-friendly and does not necessitate specialized equipment, was successfully implemented. Notably, seven respiratory viruses showed no crossreactivity with the generated LFIA test strips. The intrabatch repeatability exhibited a coefficient of variation (CV) of less than 5%, while the interbatch repeatability had a CV of less than 15%. Furthermore, recovery values ranged from 95% to 106.8% for samples analyzed concurrently with dual signals at the same spiking concentration. The assay developed in this study boasts a wide detection range and exceptional sensitivity and specificity. This technique is exceptionally well-suited for on-site rapid detection, with the potential for personal self-testing and early ADV infection diagnosis. Its versatility extends to a broad array of application scenarios.

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Section: Introductionmentioning

confidence: 99%

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

Wang,

Li,

Liu

et al. 2024

Anal. Chem.

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“…By utilizing energy transfer between Yb 3+ and Er 3+ ions, co-doping Er 3+ with Yb 3+ greatly enhances the upconversion luminescence of Er 3+ [26]. What's more, through the utilizing of a core-shell structure, the luminescence intensity from Er 3+ can be enhanced obviously due to the suppression of surface emission quenching, which promotes the applications of up-conversion nanocrystals in various fields, like bio-imaging and temperature sensing [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Power-dependent up-conversion emissions and temperature sensing properties of NaYF₄:Er/Yb@NaYF₄ phosphors

Xuecheng,

Haoyue,

Liang

2024

Phys. Scr.

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Rare earth doped luminescent materials have unique up-conversion properties and can be applied to optical temperature sensing. In this work, the power-dependent emission intensity from bare core NaYF4:Er/Yb and core-shell structured NaYF4:Er/Yb@NaYF4 phosphors and the temperature sensing properties of NaYF4:Er/Yb@NaYF4 phosphors are investigated. The NaYF4:Er/Yb and NaYF4:Er/Yb@NaYF4 phosphors are prepared through typical co-precipitation method. The enhancement factor of emissions located at 520, 540 and 654 nm reach 1.51, 1.42 and 1.75, respectively, which is originated to the suppression of surface quenching. The enhancement factor decreases slowly with excitation power increasing due to the more sensitivity to laser power of the bare core phosphors. In addition, the green emissions (520 and 540 nm) exhibit distinct temperature-dependent behaviors, including relatively sensing sensitivity and thermal repeatability stability. The maximal relatively sensing sensitivity reaches 1.2 % K−1 at 294 K and The value of thermal repeatability stability reaches 98.4%.

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Electrospinning of photoluminescent-magnetic GdF3:Tb3+,Sm3+@SiO2 belt-in-belt structured nanoribbons with tunable fluorescence and energy transfer

Lv,

Liu,

et al. 2024

Ceramics International

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Surface crystallization enhanced upconversion luminescence in NaGdF4:Yb,Er@NaYF4 core/shell nanocrystals

Cited by 7 publications

References 26 publications

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

Power-dependent up-conversion emissions and temperature sensing properties of NaYF₄:Er/Yb@NaYF₄ phosphors

Electrospinning of photoluminescent-magnetic GdF3:Tb3+,Sm3+@SiO2 belt-in-belt structured nanoribbons with tunable fluorescence and energy transfer

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Surface crystallization enhanced upconversion luminescence in NaGdF4:Yb,Er@NaYF4 core/shell nanocrystals

Cited by 7 publications

References 26 publications

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

A Magnetic-Optical Triple-Mode Lateral Flow Immunoassay for Sensitive and Rapid Detection of Respiratory Adenovirus

Power-dependent up-conversion emissions and temperature sensing properties of NaYF4:Er/Yb@NaYF4 phosphors

Electrospinning of photoluminescent-magnetic GdF3:Tb3+,Sm3+@SiO2 belt-in-belt structured nanoribbons with tunable fluorescence and energy transfer

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Power-dependent up-conversion emissions and temperature sensing properties of NaYF₄:Er/Yb@NaYF₄ phosphors