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Photoluminescence mechanism in graphene quantum dots: Quantum confinement effect and surface/edge state
Nano Today ( IF 17.4 ) Pub Date : 2017-04-01 , DOI: 10.1016/j.nantod.2016.12.006
Shoujun Zhu , Yubin Song , Joy Wang , Hao Wan , Yuan Zhang , Yang Ning , Bai Yang

Abstract As a new class of fluorescent carbon materials, graphene quantum dots (GQDs) have drawn increasing attention due to their outstanding properties and potential applications. Herein, GQDs prepared by chemical synthetic strategies, which mainly contain cutting different carbon resources and carbonization from small molecules or polymers, are discussed. Although the photoluminescence (PL) mechanism of GQDs can be explained by the size of the GQDs, surface chemical groups, and doping atoms, there is no universal agreement on the specific PL mechanism. The dominant PL mechanism of GQDs consists of the quantum confinement effect of conjugated π-domains, the surface/edge state in GQDs, as well as the synergistic effect of these two factors.

中文翻译:

石墨烯量子点中的光致发光机制:量子限制效应和表面/边缘状态

摘要 作为一类新型荧光碳材料,石墨烯量子点(GQDs)因其优异的性能和潜在的应用而受到越来越多的关注。本文讨论了通过化学合成策略制备的 GQD,主要包括从小分子或聚合物中切割不同的碳资源和碳化。尽管 GQDs 的光致发光 (PL) 机制可以通过 GQDs 的大小、表面化学基团和掺杂原子来解释,但对于具体的 PL 机制还没有普遍的共识。GQDs 的主要 PL 机制包括共轭 π 域的量子限制效应、GQDs 的表面/边缘态,以及这两个因素的协同效应。
更新日期:2017-04-01
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