中国物理B ›› 2010, Vol. 19 ›› Issue (4): 47304-047304.doi: 10.1088/1674-1056/19/4/047304

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Influence of local environment on the intensity of the localized surface plasmon polariton of Ag nanoparticles

黄茜, 张晓丹, 张鹤, 熊绍珍, 耿卫东, 耿新华, 赵颖   

  1. Institute of Photo-electronics Thin Film Devices and Technique of Nankai University, Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin, Key Laboratory of Opto-electronic Information Science and Technology (Nankai University and Tianjin University), Ministry of Education, Tianjin 300071, China
  • 收稿日期:2009-10-16 修回日期:2009-11-23 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by Hi-Tech Research and Development Program of China (Grant Nos.~2007AA05Z436 and 2009AA050602), Science and Technology Foundation of Tianjin (Grant No.~08ZCKFGX03500), National Basic Research Program of China (Grant Nos.~2006CB202602 an

Influence of local environment on the intensity of the localized surface plasmon polariton of Ag nanoparticles

Huang Qian(黄茜)†, Zhang Xiao-Dan(张晓丹), Zhang He(张鹤), Xiong Shao-Zhen(熊绍珍), Geng Wei-Dong(耿卫东), Geng Xin-Hua(耿新华), and Zhao Ying(赵颖)   

  1. Institute of Photo-electronics Thin Film Devices and Technique of Nankai University, Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin, Key Laboratory of Opto-electronic Information Science and Technology (Nankai University and Tianjin University), Ministry of Education, Tianjin 300071, China
  • Received:2009-10-16 Revised:2009-11-23 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by Hi-Tech Research and Development Program of China (Grant Nos.~2007AA05Z436 and 2009AA050602), Science and Technology Foundation of Tianjin (Grant No.~08ZCKFGX03500), National Basic Research Program of China (Grant Nos.~2006CB202602 an

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摘要： A combined Ag nanoparticle with an insulating or conductive layer structure has been designed for molecular detection using surface enhanced Raman scattering microscopy. Optical absorption studies revealed localized surface plasmon resonance, which shows regular red shift with increasing environmental dielectric constant. With the combined structure of surface enhanced Raman scattering substrates and rhodamine 6G as a test molecule, the results in this paper show that the absorption has a linear relationship with the local electromagnetic field for insulating substrates, and the electrical property of the substrate has a non-negligible effect on the intensity of the local electromagnetic field and hence the Raman enhancement.

Abstract: A combined Ag nanoparticle with an insulating or conductive layer structure has been designed for molecular detection using surface enhanced Raman scattering microscopy. Optical absorption studies revealed localized surface plasmon resonance, which shows regular red shift with increasing environmental dielectric constant. With the combined structure of surface enhanced Raman scattering substrates and rhodamine 6G as a test molecule, the results in this paper show that the absorption has a linear relationship with the local electromagnetic field for insulating substrates, and the electrical property of the substrate has a non-negligible effect on the intensity of the local electromagnetic field and hence the Raman enhancement.

Key words: silver nanoparticles, resonance absorption, surface enhanced Raman scattering, local environment

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
78.30.Er (Solid metals and alloys ?) 78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 73.63.-b (Electronic transport in nanoscale materials and structures)