Langasite surface acoustic wave gas sensors: modeling and verification

Peng Zheng,; Greve, D. W.; Oppenheim, I. J.

doi:10.1109/TUFFC.2013.2599

Title: Langasite surface acoustic wave gas sensors: modeling and verification

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Abstract

We report finite element simulations of the effect of conductive sensing layers on the surface wave velocity of langasite substrates. The simulations include both the mechanical and electrical influences of the conducting sensing layer. We show that three-dimensional simulations are necessary because of the out-of-plane displacements of the commonly used (0, 138.5, 26.7) Euler angle. Measurements of the transducer input admittance in reflective delay-line devices yield a value for the electromechanical coupling coefficient that is in good agreement with the three-dimensional simulations on bare langasite substrate. The input admittance measurements also show evidence of excitation of an additional wave mode and excess loss due to the finger resistance. The results of these simulations and measurements will be useful in the design of surface acoustic wave gas sensors.

Authors:: Peng Zheng,; Greve, D. W.; Oppenheim, I. J.

Publication Date:: Fri Mar 01 00:00:00 EST 2013

Research Org.:: National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research; National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1123823

Report Number(s):: TPR-3927
Journal ID: ISSN 0885-3010

DOE Contract Number:: DE-FE0004000

Resource Type:: Journal Article

Journal Name:: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

Additional Journal Information:: Journal Volume: 60; Journal Issue: 3; Journal ID: ISSN 0885-3010

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; Gas sensing, surface acoustic wave, modeling, chemiresistive

Citation Formats


                    Peng Zheng,, Greve, D. W., and Oppenheim, I. J. Langasite surface acoustic wave gas sensors: modeling and verification.  United States: N. p., 2013. 
        Web.  doi:10.1109/TUFFC.2013.2599.

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                    Peng Zheng,, Greve, D. W., & Oppenheim, I. J. Langasite surface acoustic wave gas sensors: modeling and verification.  United States.  https://doi.org/10.1109/TUFFC.2013.2599

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                    Peng Zheng,, Greve, D. W., and Oppenheim, I. J. 2013.  
        "Langasite surface acoustic wave gas sensors: modeling and verification".  United States.  https://doi.org/10.1109/TUFFC.2013.2599.  https://www.osti.gov/servlets/purl/1123823.

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@article{osti_1123823,

  title        = {Langasite surface acoustic wave gas sensors: modeling and verification},

  author       = {Peng Zheng, and Greve, D. W. and Oppenheim, I. J.},

  abstractNote = {We report finite element simulations of the effect of conductive sensing layers on the surface wave velocity of langasite substrates. The simulations include both the mechanical and electrical influences of the conducting sensing layer. We show that three-dimensional simulations are necessary because of the out-of-plane displacements of the commonly used (0, 138.5, 26.7) Euler angle. Measurements of the transducer input admittance in reflective delay-line devices yield a value for the electromechanical coupling coefficient that is in good agreement with the three-dimensional simulations on bare langasite substrate. The input admittance measurements also show evidence of excitation of an additional wave mode and excess loss due to the finger resistance. The results of these simulations and measurements will be useful in the design of surface acoustic wave gas sensors.},

  doi          = {10.1109/TUFFC.2013.2599},

  url          = {https://www.osti.gov/biblio/1123823},
  journal      = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},

  issn         = {0885-3010},

  number       = 3,

  volume       = 60,

  place        = {United States},

  year         = {Fri Mar 01 00:00:00 EST 2013},

  month        = {Fri Mar 01 00:00:00 EST 2013}

}

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