A previous study reported that graphene quantum dots (GQDs) generated by electrooxidation of graphene had a uniform size of 3−5 nm and exhibit excitation wavelength-dependent photoluminescence (PL). Here, larger GQDs with an average diameter of ca. 52 nm are obtained via using similar method. And their PL show excitation wavelength-independent properties.

中文翻译：

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石墨烯电氧化成石墨烯量子点的新见解

先前的研究报道了石墨烯的电氧化产生的石墨烯量子点（GQDs）具有3均匀的尺寸- 5 nm和表现出激发波长相关的光致发光（PL）。在这里，平均直径大约为2的较大GQD。通过使用类似方法获得52nm。而且它们的PL显示出与激发波长无关的特性。