Sensitive fluorescent light-up probe for enzymatic determination of glucose using carbon dots modified with MnO₂ nanosheets

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• 作者：Hong Ma ; Xiaoyu Liu ; Xudong Wang ; Xinran Li ; Chengduan Yang…
• 关键词：Carbon nanoparticles ; MnO2 ; CD nanocomposite ; Fluorescent probe ; Enzymatic assay ; H2O2 ; Blood glucose analysis
• 刊名：Microchimica Acta
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：184
• 期：1
• 页码：177-185
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanochemistry; Nanotechnology; Characterization and Evaluation of Materials; Analytical Chemistry; Microengineering;
• 出版者：Springer Vienna
• ISSN：1436-5073
• 卷排序：184

文摘

We describe a highly sensitive glucose probe based on carbon dots modified with MnO₂. A strong reduction of the green fluorescence of the carbon dots (CDs) happened due to the surface energy transfer (SET) from CDs to the deposited MnO₂. In the presence of H₂O₂ (formed via enzymatic oxidation of glucose), fluorescence is restored because the MnO₂ nanosheets are reduced to form colorless Mn(II) ions. These findings were used to design a fluorometric glucose assay that has a detection limit as low as 44 nM (at an S/N ratio of 3).