Focusing on luminescent graphene quantum dots: current status and future perspectives.

By Lingling Li, Gehui Wu, Guohai Yang, Juan Peng, Jian-wei Zhao, Jun‐Jie Zhu. Nanoscale, 2013

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Synthesis and applications of graphene quantum dots: a review (2018, methodology): “[66] summarized the synthetic methods on the top-down routes, which possess the advantages of abundant raw materials, large-scale production, and simple operations, and systematically discussed the optical properties of GQDs, ranging from the mechanism and the influencing factors to the optical tuna”
N-doped graphitic carbon-incorporated g-C3N4 for remarkably enhanced photocatalytic H2 evolution under visible light (2016, neutral): “graphene quantum dots (GQDs) sensitized semiconductors [24,25].”
Luminescence origin of carbon based dots obtained from citric acid and amino group-containing molecules (2017, neutral): “In general, the preparation methods can be classified into “top-down” and “bottom-up” approaches, which refer to cutting big-size carbon sources and carbonizing some special organics into small-size CDs, respectively [6,9].”
Graphene quantum dots from chemistry to applications (2018, methodology): “9% [60], which is much lower than the traditional semiconductor QDs.”
Preparation of functionalized water-soluble photoluminescent carbon quantum dots from petroleum coke (2014, background): “[4] Li L, Wu G, Yang G, Peng J, Zhao J, Zhu JJ.”