›› 2014, Vol. 23 ›› Issue (8): 86102-086102.doi: 10.1088/1674-1056/23/8/086102

• SPECIAL TOPI—International Conference on Nanoscience & Technology, China 2013 • 上一篇    下一篇

Enhanced photoluminescence of CdSe quantum dots by the coupling of Ag nanocube and Ag film

蒋童童a, 邵伟佳a, 尹乃强a, 刘玲a, 宋江鲁奇a, 朱立新b, 许小亮a   

  1. a Department of Physics, University of Science and Technology of China, Hefei 230026, China;
    b Center Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
  • 收稿日期:2013-09-04 修回日期:2014-03-31 出版日期:2014-08-15 发布日期:2014-08-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51272246 and 81172082) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2030000001).

Enhanced photoluminescence of CdSe quantum dots by the coupling of Ag nanocube and Ag film

Jiang Tong-Tong (蒋童童)a, Shao Wei-Jia (邵伟佳)a, Yin Nai-Qiang (尹乃强)a, Liu Ling (刘玲)a, Song Jiang-Lu-Qi (宋江鲁奇)a, Zhu Li-Xin (朱立新)b, Xu Xiao-Liang (许小亮)a   

  1. a Department of Physics, University of Science and Technology of China, Hefei 230026, China;
    b Center Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
  • Received:2013-09-04 Revised:2014-03-31 Online:2014-08-15 Published:2014-08-15
  • Contact: Zhu Li-Xin, Xu Xiao-Liang E-mail:lx-zhu@163.com;xlxu@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51272246 and 81172082) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2030000001).

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摘要： The coupling of local surface plasmon (LSP) of nanoparticle and surface plasmon (SP) mode produced by metal film can lead to the enhanced electromagnetic field, which has an important application in enhancing the fluorescence of quantum dots (QDs). Herein, the Ag nanocube and Ag film are used to enhance the fluorescence of CdSe QDs. The enhancement is found to relate to the sizes of the Ag nanocube and the thickness of the Ag film. Moreover, we also present the fluorescence enhancement caused by only SP. The result shows that the coupling between metal nanoparticles and metal film can realize larger field enhancement. Numerical simulation verifies that a nanocube can localize a strong electric field around its corner. All the results indicate that the fluorescence of QDs can be efficiently improved by optimizing the parameters of Ag film and Ag cubes.

关键词: Ag nanocube, local surface plasmon, Ag film, photoluminescence

Abstract: The coupling of local surface plasmon (LSP) of nanoparticle and surface plasmon (SP) mode produced by metal film can lead to the enhanced electromagnetic field, which has an important application in enhancing the fluorescence of quantum dots (QDs). Herein, the Ag nanocube and Ag film are used to enhance the fluorescence of CdSe QDs. The enhancement is found to relate to the sizes of the Ag nanocube and the thickness of the Ag film. Moreover, we also present the fluorescence enhancement caused by only SP. The result shows that the coupling between metal nanoparticles and metal film can realize larger field enhancement. Numerical simulation verifies that a nanocube can localize a strong electric field around its corner. All the results indicate that the fluorescence of QDs can be efficiently improved by optimizing the parameters of Ag film and Ag cubes.

Key words: Ag nanocube, local surface plasmon, Ag film, photoluminescence

中图分类号:  (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))

  • 61.46.Df
73.63.Kv (Quantum dots) 78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC))