期刊
TALANTA
卷 150, 期 -, 页码 54-60出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2015.12.015
关键词
Graphene quantum dots; Fluorescence; Sensor; Detection of Fe3+; Bioimaging
资金
- State Key Project of Fundamental Research [2014CB931900, 2012CB932504]
- Chinese Academy of Sciences
- China Postdoctoral Science Foundation [119103S240]
Recently, carbon nanomaterials have received considerable attention as fluorescent probes owing to their low toxicity, water solubility and stable photochemical properties. However, the development of graphene quantum dots (GQDs) is still on its early stage. In this work, GQDs were successfully synthesized by one-step microwave assisted pyrolysis of aspartic acid (Asp) and NH4HCO3 mixture. The as-prepared GQDs exhibited strongly blue fluorescence with high quantum yield up to 14%. Strong fluorescence quenching effect of Fe3+ on GQDs can be used for its high selectivity detection among of general metal ions. The probe exhibited a wide linear response concentration range (0-50 mu M) to Fe3+ and the limit of detection (LOD) was calculated to be 0.26 mu M. In addition, GQDs are also sensitive to the pH value in the range from 2 to 12 indicating a great potential as optical pH sensors. More importantly, the GQDs possess lower cellular toxicity and high photostability and can be directly used as fluorescent probes for cell imaging. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据