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Reduced carbon dots employed for synthesizing metal nanoclusters and nanoparticles

机译:用于合成金属纳米团簇和纳米颗粒的还原碳点

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摘要

Carbon dots (CDs) have been considered as ideal and promising fluorescent materials owing to their excellent optical, electronic and biocompatible properties including photoluminescence, photostability, electron transfer behavior and biocompatibility. Interestingly, reduced state carbon dots (r-CDs) have emerged as a new type of CDs. Herein, we successfully prepared CDs based on cysteine serving as the carbon source, and further creatively synthesized r-CDs via simply introducing NaBH4 into the solution of CDs. Significantly, this type of r-CDs innovatively played the role of a reducer for directly synthesizing AuNCs and AuNPs (AgNPs), the reductive groups on their surfaces providing r-CDs with excellent electron-donating capability, thereby facilitating the fast reduction of metal ions to corresponding metal nanoclusters or nanoparticles. Besides, this exploration may open a new scope of CD applications in synthesis of metal nanomaterials.
机译:碳点(CD)由于其出色的光学,电子和生物相容性,包括光致发光,光稳定性,电子转移行为和生物相容性,被认为是理想的荧光材料。有趣的是,还原态碳点(r-CD)已作为一种新型CD出现。在此,我们成功地制备了以半胱氨酸为碳源的CD,并通过将NaBH4引入CD溶液中进一步创造性地合成了r-CD。重要的是,这种类型的r-CD具有创新性的还原剂作用,可直接合成AuNCs和AuNPs(AgNPs),其表面上的还原基团为r-CD提供了出色的供电子能力,从而促进了金属离子的快速还原。相应的金属纳米团簇或纳米颗粒。此外,这项探索可能会开辟CD在金属纳米材料合成中的新应用范围。

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