Preparation of fluorescent carbon dots from peat for Fe 3+ sensing and cellular imaging

Micro & nano letters

article

Shuai Han¹  Baoshuang Wu¹  Hong Wang³  Guangshuo Wang¹  Jiajia Yang¹  Leqin He¹  Fangfang Wei¹  Shenjun Qin² 

[1] College of Materials Science and Engineering, Hebei University of Engineering;Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of engineering;First Department of Geriatrics, the first hospital of Hebei Shijiazhuang city

关键词: photoluminescence;    nanofabrication;    scanning electron microscopy;    solubility;    chemical sensors;    X-ray photoelectron spectra;    carbon;    radiation quenching;    cellular biophysics;    fluorescence;    transmission electron microscopy;    X-ray diffraction;    Fourier transform infrared spectra;    nanosensors;    nanostructured materials;    biosensors;    nanobiotechnology;    cellular imaging;    novel fluorescent carbon dots;    hydrothermal carbonisation method;    low-cost natural material;    transmission electron microscopy images;    peat-derived CDs;    X-ray photoelectron spectra;    oxygenous functionality;    optical characterisations;    excitation-dependent photoluminescence;    ferric ions;    low-detection limit;    as-prepared PCDs;    highly fluorescent probe;    fluorescent imaging;    PCDs water-soluble;    size 4.0 nm;    Fe;    C;   

DOI  :  10.1049/mnl.2019.0314

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Novel fluorescent carbon dots (CDs) were fabricated using the hydrothermal carbonisation method by peat, which is a very abundant and low-cost natural material in the world. The transmission electron microscopy images revealed that the peat-derived CDs (PCDs) are well-crystalline with an average size of 4 nm. Fourier transform infrared and X-ray photoelectron spectra suggested large amounts of oxygenous functionality which made the synthesised PCDs water-soluble. The optical characterisations turned out that PCDs showed a stable and excellent excitation-dependent photoluminescence (PL), while the quantum yield was calculated to be 18.3%. As the PL of the PCDs could be efficiently quenched by ferric ions with a low-detection limit of 20 nM, the as-prepared PCDs could be employed as a highly fluorescent probe for ferric ions. Furthermore, the obtained PCDs have been successfully used for fluorescent imaging and Fe 3+ detecting at cell level.

【 授权许可】

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