Cheng Yujia, Yu Guang
Mechanical and Electrical Engineering Institute, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528400, China.
Molecules. 2023 Nov 8;28(22):7473. doi: 10.3390/molecules28227473.
This article discusses the application and research status of long-wavelength fluorescent carbon dots. Currently, there are two main methods for synthesising carbon dots (CDs), either from top to bottom, according to the bulk material, or from bottom to top, according to the small molecules. In previous research, mainly graphite and carbon fibres were used as raw materials with which to prepare CDs, using methods such as arc discharge, laser corrosion, and electrochemistry. These preparation methods have low quantum efficiencies and afford CDs that are limited to blue short-wavelength light emissions. With advancing research, the raw materials used for CD preparation have expanded from graphite to biomaterials, such as strawberry, lime juice, and silkworm chrysalis, and carbon-based molecules, such as citric acid, urea, and ethylenediamine (EDA). The preparation of CDs using carbon-based materials is more rapid and convenient because it involves the use of microwaves, ultrasonication, and hydrothermal techniques. Research on developing methods through which to prepare CDs has made great progress. The current research in this regard is focused on the synthesis of CDs, including long-wavelength fluorescent CDs, with a broader range of applications.
本文讨论了长波长荧光碳点的应用及研究现状。目前，合成碳点（CDs）主要有两种方法，一种是根据块状材料从大到小合成，另一种是根据小分子由小到大合成。在以往的研究中，主要以石墨和碳纤维为原料，采用电弧放电、激光腐蚀和电化学等方法制备碳点。这些制备方法量子效率低，所制备的碳点仅限于蓝色短波长发光。随着研究的推进，用于制备碳点的原料已从石墨扩展到生物材料，如草莓、柠檬汁和蚕茧，以及碳基分子，如柠檬酸、尿素和乙二胺（EDA）。使用碳基材料制备碳点更快更方便，因为它涉及微波、超声和水热技术的应用。在开发制备碳点的方法方面取得了很大进展。目前这方面的研究集中在碳点的合成上，包括具有更广泛应用的长波长荧光碳点。
