微球
微流控
量子点
纳米技术
材料科学
聚合物
兴奋剂
光电子学
化学工程
复合材料
工程类
作者
Kamilla Kurassova,N. A. Filatov,Sofia Karamysheva,Anton Bukatin,Anton A. Starovoytov,T. A. Vartanyan,Frank Vollmer,N. A. Toropov
出处
期刊:ACS omega
[American Chemical Society]
日期:2024-09-02
标识
DOI:10.1021/acsomega.4c07270
摘要
Fluorescent microspheres are at the forefront of biosensing technologies. They can be used for a wide range of biomedical applications. They consist of organic dyes and polymers, which are relatively immune to photobleaching and other environmental factors. However, recently developed AgInS2/ZnS quantum dots are a water-soluble, low-toxicity class of semiconductor nanocrystals with enhanced stability as fluorescent materials. Here, we propose a simple way for making microspheres: a microfluidic dripping technique for acrylamide polymer spheres doped with quantum dots. Analyses of their spectra show that the emission of quantum dots, dispersed in water, is saturated with an increasing pump intensity, while quantum dots embedded into polymer microspheres exhibit a more sustained emission. Moreover, our study unveils a remarkable reduction in the luminescence lifetime of quantum dots embedded in microspheres: the mean value of the decay time for quantum dots in solutions was 91 and 3.5 ns for similar quantum dots incorporated into polymer microspheres.
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