Preparation and Fluorescence Properties of Silica Encapsulated CN-PPV Nanoparticles

ZHENG Bo-yuan; CHANG Kai-wen; SUN Kai; LI Qiong; ZHANG Rui; DAI Ming-jun; CHEN Xue-fei; WU

doi:10.3788/fgxb20133407.0845

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Preparation and Fluorescence Properties of Silica Encapsulated CN-PPV Nanoparticles

更新时间：2020-08-12

- Preparation and Fluorescence Properties of Silica Encapsulated CN-PPV Nanoparticles
- Chinese Journal of Luminescence Vol. 34, Issue 7, Pages: 845-849(2013)
- 作者机构：
  
  集成光电子学国家重点联合实验室吉林大学电子科学与工程学院,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133407.0845
  CLC： O482.31
- Received：10 April 2013，
  
  Revised：04 June 2013，
  
  Published：10 July 2013
- 稿件说明：
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郑博元, 常开文, 孙凯, 李琼, 张蕊, 代明军, 陈雪霏, 吴长锋. SiO<sub>2</sub>包覆共轭聚合物CN-PPV纳米探针的制备与荧光性质[J]. 发光学报, 2013,34(7): 845-849

ZHENG Bo-yuan, CHANG Kai-wen, SUN Kai, LI Qiong, ZHANG Rui, DAI Ming-jun, CHEN Xue-fei, WU Chang-feng. Preparation and Fluorescence Properties of Silica Encapsulated CN-PPV Nanoparticles[J]. Chinese Journal of Luminescence, 2013,34(7): 845-849
郑博元, 常开文, 孙凯, 李琼, 张蕊, 代明军, 陈雪霏, 吴长锋. SiO<sub>2</sub>包覆共轭聚合物CN-PPV纳米探针的制备与荧光性质[J]. 发光学报, 2013,34(7): 845-849 DOI： 10.3788/fgxb20133407.0845.

ZHENG Bo-yuan, CHANG Kai-wen, SUN Kai, LI Qiong, ZHANG Rui, DAI Ming-jun, CHEN Xue-fei, WU Chang-feng. Preparation and Fluorescence Properties of Silica Encapsulated CN-PPV Nanoparticles[J]. Chinese Journal of Luminescence, 2013,34(7): 845-849 DOI： 10.3788/fgxb20133407.0845.

摘要

采用纳米沉淀法制备了半导体聚合物CN-PPV纳米粒子

并用改进的Stber方法对纳米粒子进行包覆

获得了发光稳定的SiO

/CN-PPV纳米粒子。用动态光散射(DLS)及透射电镜(TEM)方法对粒子尺寸进行了表征

结果表明包覆前的CN-PPV纳米粒子平均粒径约为30 nm

包覆获得SiO

/CN-PPV纳米粒子的平均粒径约为60 nm。通过紫外-可见吸收光谱及荧光光谱对包覆前后纳米粒子的发光性质进行了比较

发现共轭聚合物CN-PPV包覆后的发射光谱与包覆前相比发生了小的蓝移

表明共轭聚合物的分子构型可能发生了微小变化。SiO

包覆可以提高聚合物发光分子的光稳定性

并且提供用于生物分子耦联的表面

这类材料有望在生物医学成像中获得应用。

Abstract

Semiconducting polymer CN-PPV nanoparticles (NPs) were prepared by the reprecipitation method and further encapsulated by a facile method. The particle size and the distribution were characterized by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The average diameter is ~30 nm for bare CN-PPV nanopartilces and ~60 nm for encapsulated ones. UV-Vis and fluorescence spectroscopy showed consistent results between CN-PPV and SiO

/CN-PPV nanoparticles. More importantly

silica capsulation improved the photostablility of CN-PPV nanoparticles

and provided reliable surface for covalent conjugation with biomolecules. These photostable nanoprobes are promising for biomedical imaging applications.

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references

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