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首页> 外文期刊>RSC Advances >Protein-derived carbon nanodots with an ethylenediamine-modulated structure as sensitive fluorescent probes for Cu2+ detection
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Protein-derived carbon nanodots with an ethylenediamine-modulated structure as sensitive fluorescent probes for Cu2+ detection

机译：具有乙二胺调节结构的蛋白质衍生的碳纳米点作为敏感的荧光探针，用于Cu 2 + 检测

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The increasing use of fluorescent carbon nanodots (CNDs) demonstrates their advantages for sensing applications; these include superior photostability, absence of toxicity, and rapid analytical capability. However, CNDs usually have multiple types of functional groups covering their surfaces, which decrease their sensitivity and selectivity. In this study, the required structure of β-lactoglobulin (LG)-derived carbon nanodots was achieved by adding ethylenediamine (EDA) to the synthesis process. Due to the consumption of protein carboxyl groups during the preparation process, a homogeneous coverage of amino groups on the surfaces of the CNDs was achieved, resulting in high sensitivity of the CNDs to copper ions. Furthermore, owing to effective passivation of trap states and a high content of N doping, the as-prepared CNDs showed a high quantum yield and an excitation-independent emission property. We believe that this type of preparation method is useful for the design of protein-derived CNDs, which may have promising applications for detecting various metal ions in a biological environment.
机译：荧光碳纳米点（CND）的使用不断增加，证明了其在传感应用中的优势;这些包括优异的光稳定性，无毒性和快速分析能力。但是，CND通常具有覆盖其表面的多种官能团，这会降低其灵敏度和选择性。在这项研究中，通过在合成过程中添加乙二胺（EDA）来获得所需的β-乳球蛋白（LG）衍生的碳纳米点结构。由于在制备过程中消耗了蛋白质羧基，因此CND表面上的氨基被均匀覆盖，导致CND对铜离子的敏感性高。此外，由于陷阱态的有效钝化和高含量的N掺杂，所制备的CND显示出高的量子产率和与激发无关的发射性质。我们认为，这种制备方法可用于设计蛋白质衍生的CND，在生物环境中检测各种金属离子方面可能具有广阔的应用前景。

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