CAJ | 학술논문

为获得独特的光致发光特性的碳基量子点，以氧化石墨烯（ GOs ）为前驱物，采用水热反应合成了一类富氧官能团修饰的石墨烯量子点（GQDs）．TEM和AFM表征GQDs平均粒径为（5．02±0．92） nm，厚度为0．6 nm．GQDs呈现特有的光致发光峰位随激发波长移动的特性，其光致发光机理来源于量子点边缘的类卡宾zigzag活性位．由于Fe3＋与GQDs表面羟基的配位作用使GQDs呈现出对Fe3＋离子检测的高灵敏度和快速响应，有望成为高效检测Fe3＋离子的新型荧光探针．
위획득독특적광치발광특성적탄기양자점，이양화석묵희（ GOs ）위전구물，채용수열반응합성료일류부양관능단수식적석묵희양자점（GQDs）．TEM화AFM표정GQDs평균립경위（5．02±0．92） nm，후도위0．6 nm．GQDs정현특유적광치발광봉위수격발파장이동적특성，기광치발광궤리래원우양자점변연적류잡빈zigzag활성위．유우Fe3＋여GQDs표면간기적배위작용사GQDs정현출대Fe3＋리자검측적고령민도화쾌속향응，유망성위고효검측Fe3＋리자적신형형광탐침．
To achieve a new type of carbon-based quantum dots with unique photoluminescence PL a simple approach for fabrication of graphene quantum dots GQDs with oxygen-rich groups was developed via the hydrothermal reaction by using graphene oxides GOs as a precursor. Transmission electron microscope TEM and atomic force microscope AFM characterizations confirmed that the sizes and heights of GQDs were 5.02 ±0.92 nm and 0.6 nm respectively.A strong PL emission exhibited unique excitation wavelength dependent features.Also the carbene-like free zigzag edge sites were proposed to be the origin of the strong PL emission.The GQDs were demonstrated to be a superior probe for Fe3+ detection in aqueous solution with a high sensitivity and feasibility due to the special coordinate interaction between Fe3+and the phenolic hydroxyl group at GQDs.