Citation: Liu Ao, Li Mengmeng, Wang Jingxiang, Feng Fan, Zhang Yu, Qiu Zhiwei, Chen Yuzhu, Meteku Benjamin Edem, Wen Congying, Yan Zifeng, Zeng Jingbin. Ag@Au core/shell triangular nanoplates with dual enzyme-like properties for the colorimetric sensing of glucose[J]. Chinese Chemical Letters, ;2020, 31(5): 1133-1136. doi: 10.1016/j.cclet.2019.10.011 shu

Ag@Au core/shell triangular nanoplates with dual enzyme-like properties for the colorimetric sensing of glucose

a.
College of Science, China University of Petroleum(East China), Qingdao 266580, China
b.
Integrated Traditional Chinese and Western Medicine Hospital of Shandong, Qingdao 266002, China
c.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China
d.
State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China

zengjb@upc.edu.cn

Received Date: 23 August 2019
Revised Date: 11 October 2019
Accepted Date: 11 October 2019
Available Online: 21 October 2019

Figures(6)

Due to the serious harm of diabetes to human health, development of sensitive assays for glucose level is of high significance for early prevention and treatment of diabetes. Currently, most conventional enzyme-based glucose sensors suffer from high cost and low stability due to the inherent defects of natural enzymes. Herein, we develop a pure nanozyme-based glucose detection method using Ag@Au core/shell triangular nanoplates (TNPs), which combines glucose oxidase (GOD)-and horseradish peroxidase (HRP)-like activities of the Au shell and inherent plasmonic properties of Ag TNPs. The sensing mechanism is based on the fact that the Au shell possessed GOD-like activity, enabling the oxidation of glucose to produce H₂O₂, which can further etch the silver core, leading to the decrease of absorbance at 800 nm and the color change from blue to colorless. Compared with the previous nanozymes-based glucose sensors, our method avoids the use of enzymes and organic chromogenic agent. Moreover, the stability of the Ag@Au core/shell TNPs is much better than that of Ag TNPs due to the protection by the coating of the Au shell. This method was successfully applied to the detection of urine samples from patients with diabetes, indicating its practical applicability for real sample analysis.
- Nanozyme Ag@Au core/shell,
- Nanoplates,
- Etching glucose,
- Colorimetric sensing
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1.
沈阳化工大学材料科学与工程学院沈阳 110142