高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (6): 20240407.doi: 10.7503/cjcu20240407

• 研究论文 • 上一篇    下一篇

基于聚集调控的多色碳纳米点荧光粉

赖晓南, 沈成龙(), 单崇新   

  1. 郑州大学物理学院,中原之光实验室,郑州 450001
  • 收稿日期:2024-08-28 出版日期:2025-06-10 发布日期:2024-10-28
  • 通讯作者: 沈成龙 E-mail:phyclshen@zzu.edu.cn
  • 基金资助:
    国家自然科学基金(62204223);中国博士后科学基金(2022TQ0307);河南省自然科学基金(222102310664)

Aggregation Regulation-assisted Multicolor Carbon Nanodots Fluorescent Phosphor

LAI Xiaonan, SHEN Chenglong(), SHAN Chongxin   

  1. School of Physics and Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450001,China
  • Received:2024-08-28 Online:2025-06-10 Published:2024-10-28
  • Contact: SHEN Chenglong E-mail:phyclshen@zzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(62204223);the China Postdoctoral Science Foundation(2022TQ0307);the Natural Science Foundation of Henan Province, China(222102310664)

摘要:

以柠檬酸和尿素为原料, NN-二甲基甲酰胺为溶剂, 采用溶剂热法制备了具有浓度依赖性的荧光碳纳米点. 用去离子水对碳纳米点原液进行不同倍数的稀释, 发现随着稀释倍数的增加, 碳纳米点之间的能量传递逐渐减弱, 其荧光颜色逐渐从红色转为蓝色, 发射强度逐渐增强. 使用层析分离技术研究了浓度对碳纳米点荧光发射特性的影响, 结果表明, 碳纳米点原液具有不同荧光颜色的碳纳米点组分, 碳纳米点之间的福斯特共振能量转移和吸收再发射的能量传递导致不同浓度碳纳米点溶液荧光发射的变化. 基于此, 以淀粉为限域基质, 通过调节基质中碳纳米点的浓度, 实现了多色碳纳米点荧光粉的精确调控. 研究结果为碳纳米点的光学调控提供了新思路, 为其在荧光标记和显示技术等领域的应用提供了可能性.

关键词: 碳纳米点, 多色, 荧光, 聚集调控, 荧光粉

Abstract:

Carbon nanodots(CDs) with concentration-dependent fluorescence were synthesized with citric acid and urea as precursors in NN-dimethylformamide through solvothermal strategy. The CDs solution was diluted with deionized water at various ratios. The energy transfer between the CDs particles gradually weakened when the dilution ratio increased, leading to a shift in fluorescence color from red to blue and an enhancement in emission intensity. A systematic investigation on the concentration effects on the fluorescence emission properties of CDs were conducted with a chromatography separation techniques, revealing that the as-prepared CDs solution contained the multicolor components and the fluorescence variations in CDs solutions were attributed to Förster resonance energy transfer and reabsorption energy transfer. Thus, the precise regulation of multicolor CDs phosphors was further achieved with the starch as confined matrix to regulate the energy transfer between CDs. These findings present a new strategy to regulate the optical properties of CDs and pave a new insight the applications of fluorescence labeling and display technology.

Key words: Carbon nanodots, Multicolor, Fluorescence, Aggregation regulation, Phosphors

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