期刊
NANO RESEARCH
卷 15, 期 1, 页码 414-422出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3495-8
关键词
carbon dots; solvents; tunable emission; Sudan Red I; phosphor; light-emitting diodes
类别
资金
- National Natural Science Foundation of China [51678409, 51638011, 51578375]
- Tianjin Research Program of Application Foundation and Advanced Technology [19JCYBJC19800, 18JCYBJC87500, 15ZCZDSF00880]
- State Key Laboratory of Separation Membranes and Membrane Processes [Z1-201507]
- Program for Innovative Research Team in University of Tianjin [TD13-5042]
Carbon dots (CDs) as a new type of carbon-based luminescent nanomaterials have been successfully synthesized with bright blue, yellow, and red fluorescence emission by simply changing the reaction solvent. The precursors and solvents used play a key role in the formation of the three emission CDs. The multicolor CDs exhibit high selectivity and sensitivity as fluorescent probes in detection applications.
Carbon dots (CDs), as a new kind of carbon-based luminescent nanomaterials, have drawn widespread attention in the fields of fluorescence sensing, optoelectronic devices, and biological imaging. This work uses citric acid (CA) and Nile Blue A (NBA) as precursors. By simply changing the solvent in the reaction, their bandgaps were systematically controlled, thereby successfully obtaining bright blue, yellow and red fluorescence emission CDs (B-, Y- and RCDs). The higher quantum yield (QY) of B-, Y- and RCDs are 64%, 57% and 51%, respectively. The selected precursors and different solvents are the key to the formation of three emission CDs. Detailed characterization and density functional theory (DFT) calculations further indicate that the difference in emission color of CDs is due to the size of the sp(2) conjugate domain. In addition, we used multicolor CDs as fluorescent probes to investigate their performance in detection. Among them, BCDs and YCDs can detect Sudan Red I with high selectivity and sensitivity. In the concentration range of 0 to 80 mu M, the detection limits are 56 and 41 nM, respectively. Multicolor emitting phosphors and fluorescent films are also obtained by mixing CDs with other matrices. Using Ultraviolet (UV) chip as the excitation source and combining with multicolor fluorescent film and a certain proportion of B-, Y-, and RCDs/epoxy resin composites, bright monochromatic light-emitting diodes (LEDs) and white LED (WLED) with high color rendering index (CRI) were prepared. The above results indicate that the multicolor CDs prepared by us have great application potential in the fields of food safety control and optical devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据