Magnetic and Optical Properties of Ag@Fe3O4@C-CdTe@SiO2 Hybrid Nanoparticles

SHEN Mao; CHEN Su-qing; JIA Wen-ping; JIN Yan-xian; LIANG Hua-ding

doi:10.3788/fgxb20173803.0274

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Magnetic and Optical Properties of Ag@Fe₃O₄@C-CdTe@SiO₂ Hybrid Nanoparticles

更新时间：2020-08-12

- Magnetic and Optical Properties of Ag@Fe₃O₄@C-CdTe@SiO₂ Hybrid Nanoparticles
- Chinese Journal of Luminescence Vol. 38, Issue 3, Pages: 274-280(2017)
- 作者机构：
  
  台州学院医药化工学院, 浙江台州 317028
- 作者简介：
- 基金信息：
  
  Supported by Key Disciplines of Applied Chemistry of Zhejiang Province for Taizhou U
- DOI：10.3788/fgxb20173803.0274
  CLC： O61;O482.31
- Received：11 September 2016，
  
  Revised：19 October 2016，
  
  Published：05 March 2017
- 稿件说明：
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沈茂, 陈素清, 贾文平等. Ag@Fe3O4@C-CdTe@SiO2磁性荧光复合微球的制备与光学特征[J]. 发光学报, 2017,38(3): 274-280

SHEN Mao, CHEN Su-qing, JIA Wen-ping etc. Magnetic and Optical Properties of Ag@Fe3O4@C-CdTe@SiO2 Hybrid Nanoparticles[J]. Chinese Journal of Luminescence, 2017,38(3): 274-280
沈茂, 陈素清, 贾文平等. Ag@Fe3O4@C-CdTe@SiO2磁性荧光复合微球的制备与光学特征[J]. 发光学报, 2017,38(3): 274-280 DOI： 10.3788/fgxb20173803.0274.

SHEN Mao, CHEN Su-qing, JIA Wen-ping etc. Magnetic and Optical Properties of Ag@Fe3O4@C-CdTe@SiO2 Hybrid Nanoparticles[J]. Chinese Journal of Luminescence, 2017,38(3): 274-280 DOI： 10.3788/fgxb20173803.0274.

摘要

先采用一步溶剂热法和水热法制备了碳包覆的Ag@Fe

核壳型磁性纳米粒子，然后通过表面氨基化改性后与巯基乙酸修饰的CdTe量子点反应，将量子点键合到磁性微球上，最后在其表面包覆上一层二氧化硅壳层，制备出具有荧光增强的Ag@Fe

@C-CdTe@SiO

磁性荧光复合材料。实验结果表明，该纳米粒子的平均粒径大约为150 nm，磁饱和强度为224 A/g（22.4 emu/g），在室温下具有较好的磁性能。其中Ag@Fe

@C-CdTe磁性荧光纳米粒子的荧光强度大于Fe

@C-CdTe，其主要原因是内核为45 nm的Ag纳米粒子具有表面等离子体共振作用，能够使其表面或附近的量子点荧光得到增强。

Abstract

Novel hybrid nanoparticles Ag@Fe

@C-CdTe@SiO

were prepared. The synthesis method is included of a Fe

magnetic embedded Ag core (Ag@Fe

)

an interlayer of carbon modified by PEI to form sufficient amounts of amine functional groups (Ag@Fe

@C-PEI)

the grafting of CdTe quantum dots (QDs) on the surface of Ag@Fe

@C-PEI (Ag@Fe

@C-CdTe)

and an ordered SiO

structured shell. The nanocomposites possess an average diameter of 150 nm

orange emission feature and the saturation magnetization of 224 A/g (22.4 emu/g)

which has room temperature ferro-magnetism. The photoluminescence measurement reveals that the fluorescence of Ag@Fe

@C-CdTe nanostructures in this composite with the Ag cores of about 45 nm has more enhancement compared with that of Fe

@C-CdTe nanostructures due to the strong surface plasmonic resonance of the Ag cores.

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references

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