Chinese Journal of Applied Chemistry

Chinese Journal of Applied Chemistry ›› 2012, Vol. 29 ›› Issue (02): 222-227.DOI: 10.3724/SP.J.1095.2011.00130

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Responses of Fourier Transform-Surface Plasmon Resonance Frequency to Refractive Index of the Solution in Contact with the Gold Film

WEI Jizheng1,2, HUANG Yubin1, JING Xiabin1*   

  1. (1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;
    2.Graduate School of Chinese Academy of Sciences,Beijing)
  • Received:2011-03-29 Revised:2011-05-10 Published:2012-02-10 Online:2012-02-10

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Abstract: By using the fourier transform-surface plasmon resonance(FT-SPR) technique, the FT-SPR responses(R) toward NaCl, KCl and ethanol with various aqueous concentrations were measured. A quantitative equation of R=1.53×105(n -1.3333) was set up for the response toward the concentration dependent solution refractive index(n). The result shows that the FT-SPR response of 15 cm-1 is obtained upon 0.0001 change in the refractive index. This equation is promising in direct measurement of refractive index of unknown media.

Key words: surface plasmon resonance (SPR), Fourier transform infrared (FT-IR), FT-SPR, refractive index

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