School of Materials and Energy, Yunnan University, Kunming 650091, China.
Advanced Computing Center, Materials Genome Institute, Yunnan University, Kunming 650091, China.
Int J Mol Sci. 2022 Jan 27;23(3):1456. doi: 10.3390/ijms23031456.
In this study, top-down syntheses of carbon dots (CDs) from four different carbon precursors, namely, carbon nano powders, graphite, graphene, and carbon nanotubes, were carried out. Systematic study demonstrated that the optical properties and surface functionalities of the CDs were quite similar and mainly influenced by the synthesis method, while the sizes, morphologies, chemical compositions, and core structures of the CDs were heavily influenced by the carbon precursors. On the basis of these studies, the formation processes and structural models of these four top-down CDs were proposed. The cell cytotoxicity and photothermal conversion efficiency of these CDs were also carefully evaluated, demonstrating their potential applications in photothermal therapy.
在这项研究中，我们从四种不同的碳前体（即碳纳米粉末、石墨、石墨烯和碳纳米管）进行了自上而下的碳点（CDs）合成。系统的研究表明，CDs 的光学性质和表面官能团非常相似，主要受合成方法的影响，而 CDs 的尺寸、形态、化学组成和核心结构则受碳前体的影响较大。在此基础上，提出了这四种自上而下的 CDs 的形成过程和结构模型。还仔细评估了这些 CDs 的细胞毒性和光热转换效率，证明了它们在光热治疗中的潜在应用。
