Microplasma-assisted synthesis and regulation the luminescence performance of glucose-based carbon dots by sodium borohydride

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2025-04-01 Epub Date: 2025-03-03 DOI:10.1016/j.diamond.2025.112168

A.A. Tyutrin , A.L. Rakevich , E.F. Martynovich

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Abstract

The effect of sodium borohydride (NaBH₄) on the luminescent properties of glucose-based carbon dots synthesized by the plasma method is investigated. The spectral and kinetic properties of the carbon dots were studied using a MicroTime 200 confocal scanning fluorescence microscope. The lower concentration limit of NaBH₄ was established at which there is an enhancement of the CDs luminescence intensity. It was found that adding of sodium borohydride to the CDs solution at concentration below 2.5 mg/mL leads to an increase in the luminescence intensity, while a decrease in intensity is noted at concentrations above 2.5 mg/mL. Enhancement of the luminescence intensity by 2.8 times was detected for the sample with the mass fraction of NaBH₄ was 0.04 % in the solution. Using the time-correlated photon counting method, it was shown that the luminescence decay kinetics is described by a tri-exponential function. It has been experimentally demonstrated that the fast luminescence time component is related to the carbonyl functional group on the carbon dots surface.

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硼氢化钠微等离子体辅助合成葡萄糖基碳点并调控其发光性能

研究了硼氢化钠（NaBH4）对等离子体法制备葡萄糖基碳点发光性能的影响。利用MicroTime 200共聚焦扫描荧光显微镜研究了碳点的光谱和动力学性质。建立了NaBH4的下限，在此下限下CDs的发光强度增强。结果表明，在浓度低于2.5 mg/mL的CDs溶液中加入硼氢化钠，发光强度增加，而在浓度高于2.5 mg/mL的CDs溶液中加入硼氢化钠，发光强度降低。当NaBH4质量分数为0.04%时，样品的发光强度提高了2.8倍。利用时间相关光子计数方法，证明了发光衰减动力学可以用三指数函数来描述。实验证明，快速发光时间的组成与碳点表面的羰基官能团有关。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.