Synthesis and Fluorescence Properties Research of Water-soluble Nanoparticles Based on CdSe@ZnS Quantum Dots

ZHUANG Qing-yi; YOU Fang-tian; PENG hong-shang

doi:10.3788/fgxb20183910.1339

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Synthesis and Fluorescence Properties Research of Water-soluble Nanoparticles Based on CdSe@ZnS Quantum Dots

更新时间：2020-08-12

- Synthesis and Fluorescence Properties Research of Water-soluble Nanoparticles Based on CdSe@ZnS Quantum Dots
- Chinese Journal of Luminescence Vol. 39, Issue 10, Pages: 1339-1346(2018)
- 作者机构：
  
  1. 北京交通大学光电子技术研究所发光与光信息教育部重点实验室北京,100044
  2. 中央民族大学理学院北京,100081
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(61775245)
- DOI：10.3788/fgxb20183910.1339
  CLC： O482.31
- Received：21 December 2017，
  
  Revised：05 February 2018，
  
  Published：05 October 2018
- 稿件说明：
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庄庆一, 由芳田, 彭洪尚. 基于CdSe@ZnS量子点水溶性纳米粒子的制备及荧光性能[J]. 发光学报, 2018,39(10): 1339-1346

ZHUANG Qing-yi, YOU Fang-tian, PENG hong-shang. Synthesis and Fluorescence Properties Research of Water-soluble Nanoparticles Based on CdSe@ZnS Quantum Dots[J]. Chinese Journal of Luminescence, 2018,39(10): 1339-1346
庄庆一, 由芳田, 彭洪尚. 基于CdSe@ZnS量子点水溶性纳米粒子的制备及荧光性能[J]. 发光学报, 2018,39(10): 1339-1346 DOI： 10.3788/fgxb20183910.1339.

ZHUANG Qing-yi, YOU Fang-tian, PENG hong-shang. Synthesis and Fluorescence Properties Research of Water-soluble Nanoparticles Based on CdSe@ZnS Quantum Dots[J]. Chinese Journal of Luminescence, 2018,39(10): 1339-1346 DOI： 10.3788/fgxb20183910.1339.

摘要

作为一种新型的荧光探针，量子点（QD）已经受到越来越多的重视，制备工艺也显得格外重要。水相中合成的量子点效率低，油相中的量子点经过转相以后效率也大大衰减。本论文利用再沉淀包覆的方法制备了具有良好的水溶性的掺杂绿光CdSe@ZnS的纳米颗粒G-NPs（534 nm）和掺杂红光CdSe@ZnS的纳米颗粒R-NPs（610 nm），具有窄的半峰宽（G-NPs~29 nm，R-NPs~31 nm），较小的粒径（45 nm），并在此基础上通过发射光谱与荧光衰减研究了量子点之间的能量传递现象。该方法保留了量子点原来的性质，基于其优良的光学性质，对人类肝细胞肝癌细胞株（HepG2）进行了荧光标记，从共聚焦成像实验结果看出，纳米颗粒得到了良好的吞噬效果。

Abstract

As a new kind of fluorescent probe

quantum dots(QD) have got more and more attention especially the preparation. However

QDs synthesized in aqueous phase suffer from the low efficiency and quantum yield of oil-soluble QDs dropped significantly after the ligand exchange. In this work

we report a type of green CdSe@ZnS-based(G-NPs

534 nm) and red CdSe@ZnS-based (R-NPs

610 nm) nanoparticles prepared

via

a facile reprecipitation-encapsulation method. They possess a narrow half peak width(G-NPs~29 nm

R-NPs~31 nm)

smaller particle size(45 nm). Also

we discuss critical energy transfer mechanism through the emission spectrum and the fluorescence decay. This method preserves the properties of QDs

and we used the NPs to label cancer cells(HepG2) due to their excellent optical properties. Fluorescence images of the cells clearly indicate that a good fraction of the NPs has been swallowed.

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Keywords

references

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