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Tailoring of ammonia reduced graphene oxide into amine functionalized graphene quantum dots through a Hofmann rearrangement

机译：通过霍夫曼重排将氨还原的氧化石墨烯剪裁成胺官能化的石墨烯量子点

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摘要

Graphene quantum dots (GQDs) are regarded as promising materials in building biocompatible nanodevices. This paper puts forward a protocol to fabricate amine functionalized graphene quantum dots (afGQDs) by tailoring and exfoliating multilayered ammonia reduced graphene oxide (NH2-G) into afGQDs through a Hofmann rearrangement. The principle on how a Hofmann rearrangement assists in tailoring and exfoliating of NH2-G sheets into afGQDs was posited. The size distribution of afGQDs was tuned by a simple but efficient method based on the adjustment of sodium hypobromite dosage, accompanied by hydrolysis and filtration. The afGQDs emitted broad spectral wavelengths photoluminescence (PL) with two peaks centered at 430 and 510 nm, attributed to unmodified graphene oxide quantum dots and the amine group respectively.
机译：石墨烯量子点（GQD）被认为是构建生物相容性纳米器件的有前途的材料。提出了一种通过霍夫曼重排将氨氧化石墨烯（NH2-G）多层化并剥离成afGQDs来制备胺官能化石墨烯量子点（afGQDs）的方案。提出了霍夫曼重排如何协助将NH2-G薄片剪裁和剥离成afGQD的原理。 afGQDs的大小分布是通过一种简单但有效的方法来调整的，该方法基于调整次溴酸钠的剂量，同时进行水解和过滤。 afGQD发出宽光谱波长的光致发光（PL），两个峰分别位于430和510 nm，分别归因于未修饰的氧化石墨烯量子点和胺基。

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