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Facile one-step fabrication of upconversion fluorescence carbon quantum dots anchored on graphene with enhanced nonlinear optical responses

机译：具有增强的非线性光学响应的石墨烯上锚定的上转化荧光碳量子点的舒适一步制造

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摘要

A novel nanocomposite hybrid, carbon quantum dots (CQD)/graphene oxide (GO), which combines the favorable optical properties of both its components, is synthesized by a facile one-step electrochemical method. Transmission electron microscopy, Raman spectroscopy, UV-vis spectroscopy, and fluorescence studies show that the CQDs uniformly attach on the GO surface, which enables highly efficient energy transfer between CQDs and GO. The nonlinear optical and optical limiting (OL) performances are investigated by the open-aperture Z-scan technique in the nanosecond regime using a laser with a wavelength of 532nm. The as-prepared CQD/GO composite offers a significantly improved OL performance compared with GO because of the charge/energy transfer process between the CQDs and GO. The main contributors to the enhanced OL effect in the CQD/GO hybrid are a combination of nonlinear scattering and increased nonlinear absorption resulting from efficient charge/energy transfer at the CQD/GO interface.
机译：通过容易的一步电化学方法合成了一种新的纳米复合杂交，碳量子点（CQD）/石墨烯（GO），其结合了其两种组分的良好光学性质。透射电子显微镜，拉曼光谱，UV-Vis光谱和荧光研究表明，CQD均匀地连接在去表面上，这使得CQD之间的高效能量转移并进行。使用波长为532nm的激光来研究非线性光学和光学限制（OL）性能。由于CQDS之间的充电/能量转移过程，所准备的CQD / GO Composite提供了显着改善的OL性能，而Go相比，并进行了电量。 CQD / GO杂种中增强型OL效应的主要贡献者是非线性散射和由于CQD / GO界面的有效电荷/能量转移而增加的非线性吸收的组合。

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  • 来源
    《RSC Advances》 |2018年第19期|共10页
  • 作者

    Zheng Chan; Huang Li; Guo Qiaohang; Chen Wenzhe; Li Wei; Wang Haiyan;

  • 作者单位

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

    Fujian Univ Technol Sch Mat Sci &

    Engn 3 Xueyuan Rd Fuzhou 350108 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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