多色发光硫量子点-硫化镉复合纳米颗粒的制备与光学性能

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关键词：硫量子点；SQDs-CdS复合纳米颗粒；多色发光；光稳定性；荧光聚合物复合膜 中图分类号：0482.31 文献标识码：A DOI：10.37188/CJL.20250085 CSTR：32170.14.CJL.20250085

Preparation and Optical Properties ofMulticolor Fluorescent Sulfur Quantum Dot-cadmium Sulfide Composite Nanoparticles

LI Tengbao，GAO Pengxiang，ZHOU Li* （CollgeofMaterials Scienceand Engineering，GuilinUniversityofTechnology，Guilin541o04，China） *CorrespondingAuthor，E-mail：zhouli@glut.edu.cn

Abstract：This paper presents a simple and eficient approach for preparing sulfur quantum dots-cadmium sulfide （SQD s -CdS）composite nanoparticles with tunable fluorescence colors.The successul synthesis of SQDs-CdS compositenanoparticleswas verified using various characterization techniques.Byadjusting thereaction temperature andsolutionpH，theemisionwavelengthsof thecompositenanoparticlescanbetunedacrosstheblue-to-orange fluorescencerange，efectively solving the problem of regulating SQDs’fluorescence color.Moreover，compared to pure SQDs，the composite nanoparticles show a 25% enhancement in photostability. Meanwhile，theirphotoluminescence quantum yield increases by 4 .54% relative to CdS quantum dots.Additionally，thanks to their excellent aqueous dispersibility，SQDs-CdS composite nanoparticles can beeasily blended with polyvinylalcohol（PVA）aqueous solution and processedintofilms，yielding polymercompositefilms thatemit fluorescence in various colors.Thus，SQDs-CdS compositenanoparticles hold potential forapplications in fluorescent polymercomposites，opticaldevices，and flexible displays.

Key Words：sulfur quantum dots；SQDs-CdS composite nanoparticles；multicolor fluorescence；photostability；fluorescent polymer composite films

1引言

多色光致发光材料因其独特的可调谐发光特性，在生物医药、光电传感、生物成像等领域展现出广阔的应用前景，一直是材料领域的研究热点。（剩余14401字）