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Down-shifting luminescence of water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for fluorescence turn-on detection of glucose

水溶性NaYF4:Eu3+@Ag 核-壳纳米晶的下转换荧光及其在葡萄糖检测中的应用

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Abstract

Techniques for detecting glucose are developing at a breathtaking speed because diabetes mellitus can cause many serious complications, such as blindness, high blood pressure heart disease and kidney failure. Herein, water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for glucose detection with lower detection limit have been successfully developed, using NaYF4:Eu3+ cores as the energy donors and Ag shells as the efficient quenchers through energy transfer. After immobilization of glucose oxidase (GOx) on the surface of NaYF4:Eu3+@Ag core-shell nanocrystals, the Ag shells can be decomposed in the presence of glucose, accompanied by down-shifting luminescence recovery. The limit of detection of NaYF4:Eu3+@Ag was 0.12 μmol L−1. Therefore, the NaYF4:Eu3+@Ag can be easily extended to the detection of a variety of H2O2-involved analytes.

摘要

糖尿病可引起许多严重的并发症, 例如失明, 血压心脏病和肾衰竭等. 因此, 葡萄糖检测技术正在以惊人的速度发展. 本文合成了水溶性的NaYF4:Eu3+@Ag核-壳纳米晶体, 通过能量转移, Ag壳层可以有效吸收NaYF4:Eu3+的能量, 导致Eu3+离子荧光淬灭. 在NaYF4:Eu3+@Ag核-壳纳米晶体的表面上固定葡萄糖氧化酶(GOx)后, 通过加入一定量的葡萄糖, Ag纳米粒子可以分解成Ag+, 并伴随着Eu3+的荧光恢复. 结果表明, 该葡萄糖检测方法具有非常低的检测限(0.12 μmol L−1).

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (21471050 and 21501052), the China Postdoctoral Science Foundation (2015M570304), the Postdoctoral Science Foundation of Heilongjiang Province (LBH-TZ06019), the Natural Science Foundation of Heilongjiang Province (ZD201301d), and the Science Foundation for Excellent Youth of Harbin City of China (2016RQQXJ099).

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Correspondence to Guofeng Wang  (王国凤).

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Di Wang is currently a master candidate at Heilongjiang University. She joined Professor GuofengWang’s research group in 2015, mainly working on the synthesis and application of Ln3+-doped nanocrystals.

Guofeng Wang is a professor at the Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University. Her current research is focused on the synthesis and application of Ln3+-doped nanocrystals.

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Down-shifting luminescence of water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for fluorescence turn-on detection of glucosen

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Wang, D., Wang, R., Liu, L. et al. Down-shifting luminescence of water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for fluorescence turn-on detection of glucose. Sci. China Mater. 60, 68–74 (2017). https://doi.org/10.1007/s40843-016-5145-1

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