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

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• 作者：Di Wang 王迪 ; Ruihong Wang 王瑞红 ; Liyuan Liu 刘丽娟 ; Yang Qu 曲阳…
• 关键词：NaYF4 ; Eu3+@Ag ; nanocrystals ; luminescence ; glucose
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：60
• 期：1
• 页码：68-74
• 全文大小：1966KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

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.