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Citation: XIA Xiao-Dong, YI Ping-Gui, YU Xian-Yong. The Release of Metal-Enhanced Fluorescence Ag@SiO₂ Nanocomposites for Glucose Detection[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 1456-1460. shu

The Release of Metal-Enhanced Fluorescence Ag@SiO₂ Nanocomposites for Glucose Detection

1.
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201

Corresponding author: YI Ping-Gui,
Received Date: 12 November 2008
Available Online: 20 May 2009
Fund Project: 国家重点基础研究发展规划“九七三”项目子项目(2003CB716005) (2003CB716005)国家自然科学基金(20772027)资助项目 (20772027)

Ag@SiO₂ and rhodamine-doped Ag@SiO₂ nanocomposites were prepared.Rhodamine fluorescence intensity was enhanced by a factor of 4.7 due to metal-enhanced fluorescence.The Ag core was easily oxidized by H₂O₂,enhancing the fluorescence release of rhodamine.Glucose oxidase was immobilized on the layer of SiO₂ shell by chemical cross linked cluster.A novel method to detect glucose was developed based on metal-enhanced fluorescence in a concentration range of 0.2～6.8 mmol/L with a detection limit of 0.06 mmol/L.Speedy detection response was obtained upon the fast oxidation of Ag core by H₂O₂.
- Ag@SiO₂,
- nanocomposites,
- metal-enhance fluorescence,
- metal-enhance fluorescence release,
- glucose detection
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The Release of Metal-Enhanced Fluorescence Ag@SiO₂ Nanocomposites for Glucose Detection