Poly(cytosine)-templated Silver Nanoclusters as Fluorescent Biosensor for Highly Sensitive Detection of Uric Acid
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- 作者：Yanle Li ; Nianchun Gong ; Xi Jiang ; Xiaofang Zheng ; Yaya Wang and Shuangyan Huan
- 刊名：Journal of the Chinese Chemical Society
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：63
- 期：8
- 页码：660-667
- 全文大小：736K
- ISSN：2192-6549
文摘
Uric acid (UA) is an important biomarker in urine and serum samples for early diagnosis. This study re- ports a fluorescent biosensor based on Poly(cytosine)-templated silver nanoclusters (C-Ag NCs) and uricase for the highly sensitive and fast detection of UA. The strong fluorescence of the C-Ag NCs prepared from poly (cytosine) nucleotides templates could be sensitively quenched by trace amount of H2O2, which produced from oxidation reaction of UA catalyzed by uricase. This biosensor exhibits two linear ranges as 50 nM∼50 μM and 50 μM∼400 μM, with a detection limit of 50 nM. The sensitivity of the biosensor is considerably improved compared with the methods reported in the literature. Furthermore, the detection ability of uric acid in serum samples is confirmed and this C-Ag NCs-based uric acid biosensor shows good promise of practical application.