高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (11): 2157.

• 研究论文 • 上一篇    下一篇

波长型SPR检测仪的灵敏度探讨

李海波, 徐抒平, 刘钰, 菅晓光, 徐蔚青   

  1. 吉林大学超分子结构与材料国家重点实验室, 长春 130012
  • 收稿日期:2010-05-10 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 徐蔚青, 男, 博士, 教授, 博士生导师, 主要从事纳米材料光谱学研究. E-mail: xuwq@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20903043, 20973075, 20773045)和高等学校博士学科点专项科研课题(批准号: 20090061120089)资助.

Studies on the Sensitivity of a Wavelength-dependent SPR Sensor

LI Hai-Bo, XU Shu-Ping, LIU Yu, JIAN Xiao-Guang, XU Wei-Qing*   

  1. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China
  • Received:2010-05-10 Online:2010-11-10 Published:2010-11-10
  • Contact: XU Wei-Qing. E-mail: xuwq@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20903043, 20973075, 20773045)和高等学校博士学科点专项科研课题(批准号: 20090061120089)资助.

摘要: 利用自行设计构建的可变入射角的波长型表面等离子体共振(SPR)检测仪, 在不同浓度的蔗糖溶液中测定了不同入射角度(80°~66°)的共振曲线, 经过处理得到共振峰位、半高宽及灵敏度随入射角和样品折射率变化的三维图像. 在此基础上探讨了波长型SPR检测仪的主要参数对仪器性能的影响, 从理论和实验上证明了影响灵敏度的主要因素为共振波长, 并且随着共振波长的增大, 检测灵敏度迅速提高.

关键词: 表面等离子体共振(SPR), 波长型SPR检测仪, 灵敏度, 入射角, 共振波长

Abstract: A wavelength-dependent surface plasmon resonance(SPR) sensor with tunable incident angles was designed and constructed. The resonance curves of sucrose solutions at different concentrations were measured under different incident angles(80°—66°). Several 3-dimensional(3D) maps were obtained through the experiment data, which reflects the evolution of the resonance wavelength, full width at half maximum(FWHM) and sensitivity as functions of refractive index and incident angle. The quality of the wavelength-dependent SPR sensor was systematically discussed via the theoretical simulation and experimental data. It indicates that the sensitivity increases rapidly with the red-shift of resonance wavelength. Through these 3D maps, the resonant wavelength, FWHM and sensitivity of analyses can be predicted. These 3D maps could give suggestions to the design and construction of wavelength-dependent SPR devices.

Key words: Surface plasmon resonance(SPR), Wavelength-dependent SPR sensor, Sensitivity, Incident angle, Resonance wavelength

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