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Analytical and Bioanalytical Chemistry

, Volume 394, Issue 3, pp 919–923 | Cite as

A fiber-optic evanescent wave sensor for dissolved oxygen detection based on novel hybrid fluorinated xerogels immobilized with [Ru(bpy)3]2+

  • Yan Xiong
  • Jing Xu
  • Jian-Wei Wang
  • Ya-Feng GuanEmail author
Technical Note

Abstract

We have prepared a novel fiber-optic evanescent wave sensor (FEWS) for dissolved oxygen (DO) detection. The sensor fabrication was based on coating a decladded portion of an optical fiber with a microporous coating, which was prepared from 3,3,3-trifluoropropyltrimethoxysilane and n-propyltrimethoxysilane. The fluorophores were immobilized in the porous coating and excited by the evanescent wave field produced on the core surface of the optical fiber. The sensitivity of the sensor was quantified by the ratio of the fluorescence intensities in pure deoxygenated (I 0) and in pure oxygenated environments (I). Results show that the quenching response of DO is increased with the enhancement of the coating surface hydrophobicity using the presented hybrid fluorinated ORMOSILs. The calibration curve of I 0/I to [O2] is linear from 0 to 40 ppm and the detection limit is 0.05 ppm (3σ) with a short response time of 15 s for DO detection.

Keywords

Fiber-optic Evanescent wave sensor Dissolved oxygen Hybrid ORMOSILs materials [Ru(bpy)3]2+ 

Notes

Acknowledgments

This work was supported by the Chinese Academy of Sciences, contract No. KZCX1-YW-14-3, and the Ministry of Science and Technology of China on High Tech Program, contract No. 2008AA09Z110.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Yan Xiong
    • 1
  • Jing Xu
    • 1
  • Jian-Wei Wang
    • 1
  • Ya-Feng Guan
    • 1
    Email author
  1. 1.Dalian Institute of Chemical Physics, Department of Instrumentation and Analytical ChemistryChinese Academy of SciencesDalianChina

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