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Hybrid oxygen-responsive reflective Bragg grating platforms.

Ka Yi Yung1, Huina Xu, Ke Liu

  • 1Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA.

Analytical Chemistry
|December 24, 2011
PubMed
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New oxygen sensors using ruthenium (II) complexes ([Ru(dpp)(3)](2+)) and Bragg gratings were developed. The XGrGl platform significantly enhances signal detection for oxygen sensing applications.

Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Optoelectronics

Background:

  • Developing sensitive and selective oxygen sensors is crucial for various applications.
  • Ruthenium(II) complexes are known for their luminescence properties, making them suitable for optical sensing.
  • Bragg gratings can be used to enhance optical signal detection.

Purpose of the Study:

  • To fabricate and characterize novel oxygen responsive sensor platforms.
  • To investigate the effect of integrating ruthenium(II) doped sols with Bragg gratings on sensor performance.
  • To compare the performance of different sensor configurations.

Main Methods:

  • Fabrication of oxygen responsive sensor platforms using pin printing of tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) ([Ru(dpp)(3)](2+)) doped sols onto wavelength tuned reflective Bragg gratings.

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  • Formation of xerogel-based sensors on glass (XGl), directly on the grating (XGrGl), and on the glass substrate opposite the grating (XGlGr).
  • Utilizing an epi-luminescence configuration to enhance detected signal magnitude by reflecting [Ru(dpp)(3)](2+) emission.

    • Main Results:

    • All fabricated sensors demonstrated linear and statistically equivalent oxygen sensitivities.
    • The XGrGl platform showed up to an 8-fold increase in relative detected analytical signal (RDAS) compared to the control (XGl) platform.
    • The integration of Bragg gratings effectively enhanced the detected signal for oxygen sensing.

    Conclusions:

    • The developed sensor platforms offer a promising approach for sensitive oxygen detection.
    • The XGrGl configuration provides a significant improvement in signal enhancement for oxygen sensing.
    • This work highlights the potential of combining luminescent ruthenium(II) complexes with Bragg gratings for advanced optical sensor design.