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Blue emission-dominated NaYbF4@NaYF4:2%Ho@NaYF4 upconversion nanoparticles for detecting ascorbic acid
Nanoscale ( IF 5.8 ) Pub Date : 2024-09-10 , DOI: 10.1039/d4nr02439g
Pengli Wang 1 , Jiaxin Li 1 , Yujiao Zhang 1 , Dan Xiao 1 , Cuisong Zhou 1
Affiliation  

The blue emission-dominated NaYbF4@NaYF4:2%Ho@NaYF4 (CSS) upconversion nanoparticles (UCNPs) were designed to detect ascorbic acid (AA). The blue emission of CSS was increased, ∼34 and ∼8 times higher than that of NaYF4:2%Ho@NaYbF4@NaYF4 (CSS (I)) and NaYbF4@NaYF4:20%Yb,2%Ho@ NaYF4 (CSS (II)), respectively. The dominant blue emission of CSS might be attributed to three aspects: (1) the protected NaYbF4 core for high near-infrared absorption, (2) the spatial separation of Yb3+ and Ho3+ preventing back energy transfer, and (3) their inert shell inhibiting surface quenching. It is worth noting that the fluorescence resonance energy transfer (FRET) of the CSS (donor) to MnO2 nanosheets (acceptor) was developed to trace AA. The detection limit is 0.75 μM and the detection range is 0.5–100 μM. In summary, our work not only explored the blue emission mechanism of Ho3+, but also constructed a CSS/MnO2-based nanosensing platform for the rapid and sensitive detection of AA. The blue emission of Ho3+ has promising applications in the field of sensing and detection.

中文翻译:


蓝色发射为主的 NaYbF4@NaYF4:2%Ho@NaYF4 上转换纳米颗粒检测抗坏血酸



设计了以蓝色发射为主的 NaYbF4@NaYF4:2%Ho@NaYF4 (CSS) 上转换纳米颗粒 (UCNP) 来检测抗坏血酸 (AA)。CSS 的蓝色发射增加,分别比 NaYF4:2%Ho@NaYbF4@NaYF4 (CSS (I)) 和 NaYbF4@NaYF4:20%Yb,2%Ho@ NaYF4 (CSS (II)) 高 ∼ 34 和 ∼8 倍。CSS 的主要蓝色发射可能归因于三个方面:(1) 受保护的 NaYbF4 核心具有高近红外吸收,(2) Yb3+ 和 Ho3+ 的空间分离阻止了反能转移,以及 (3) 它们的惰性外壳抑制了表面淬灭。值得注意的是,CSS(供体)到 MnO2 纳米片(受体)的荧光共振能量转移 (FRET) 是为了追踪 AA 而开发的。检测限为 0.75 μM,检测范围为 0.5–100 μM。综上所述,我们的工作不仅探索了 Ho3+ 的蓝色发射机制,还构建了基于 CSS/MnO2 的纳米传感平台,用于快速灵敏地检测 AA。Ho3+ 的蓝色发射在传感和检测领域具有广阔的应用前景。
更新日期:2024-09-10
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