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Multifrequency characterization of viscoelastic polymers and vapor sensing based on SAW oscillators.
Ultrasonics. 2009 Dec; 49(8):638-45.U

Abstract

Simplified relations for the changes in SAW velocity and attenuation due to thin polymer coatings and vapor sorption are presented by making analytic approximations to the complex theoretical model developed earlier by Martin et al. [Anal. Chem. 66 (14) (1994) 2201-2219]. The approximate velocity relation is accurate within 4% for the film thicknesses up to 20% of the acoustic wavelength in the polymer film, and is useful for analyzing the mass loading, swelling and viscoelastic effects in SAW vapor sensors. The approximate attenuation relation is accurate within 20% for very thin films, (less than 2% of the acoustic wavelength in the film). Based on these relations, a new procedure for determination of polymer viscoelastic properties is described that exploits the frequency dependence of the velocity and attenuation perturbations, and employs multifrequency measurement on the same SAW platform. Expressions for individual contributions from the mass loading, film swelling and viscoelastic effects in SAW vapor sensors are derived, and their implications for the sensor design and operation are discussed. Also, a new SAW comb filter design is proposed that offers possibility for multimode SAW oscillator operation over a decade of frequency variation, and illustrates feasibility for experimental realization of wide bandwidth multifrequency SAW platforms.

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Authors+Show Affiliations

Yadava RD
Department of Physics, Faculty of Science, Banaras Hindu University, Varanasi 221005, India. ardius@gmail.com
Kshetrimayum R
No affiliation info available
Khaneja M
No affiliation info available

MeSH

AcousticsElastic ModulusEquipment DesignEquipment Failure AnalysisGasesMaterials TestingMicro-Electrical-Mechanical SystemsOscillometryPolymersTransducersViscosity

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19403152

Citation

Yadava, R D S., et al. "Multifrequency Characterization of Viscoelastic Polymers and Vapor Sensing Based On SAW Oscillators." Ultrasonics, vol. 49, no. 8, 2009, pp. 638-45.
Yadava RD, Kshetrimayum R, Khaneja M. Multifrequency characterization of viscoelastic polymers and vapor sensing based on SAW oscillators. Ultrasonics. 2009;49(8):638-45.
Yadava, R. D., Kshetrimayum, R., & Khaneja, M. (2009). Multifrequency characterization of viscoelastic polymers and vapor sensing based on SAW oscillators. Ultrasonics, 49(8), 638-45. https://doi.org/10.1016/j.ultras.2009.03.006
Yadava RD, Kshetrimayum R, Khaneja M. Multifrequency Characterization of Viscoelastic Polymers and Vapor Sensing Based On SAW Oscillators. Ultrasonics. 2009;49(8):638-45. PubMed PMID: 19403152.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multifrequency characterization of viscoelastic polymers and vapor sensing based on SAW oscillators. AU - Yadava,R D S, AU - Kshetrimayum,Roshan, AU - Khaneja,Mamta, Y1 - 2009/04/05/ PY - 2008/04/25/received PY - 2009/01/18/revised PY - 2009/03/25/accepted PY - 2009/5/1/entrez PY - 2009/5/1/pubmed PY - 2009/12/16/medline SP - 638 EP - 45 JF - Ultrasonics JO - Ultrasonics VL - 49 IS - 8 N2 - Simplified relations for the changes in SAW velocity and attenuation due to thin polymer coatings and vapor sorption are presented by making analytic approximations to the complex theoretical model developed earlier by Martin et al. [Anal. Chem. 66 (14) (1994) 2201-2219]. The approximate velocity relation is accurate within 4% for the film thicknesses up to 20% of the acoustic wavelength in the polymer film, and is useful for analyzing the mass loading, swelling and viscoelastic effects in SAW vapor sensors. The approximate attenuation relation is accurate within 20% for very thin films, (less than 2% of the acoustic wavelength in the film). Based on these relations, a new procedure for determination of polymer viscoelastic properties is described that exploits the frequency dependence of the velocity and attenuation perturbations, and employs multifrequency measurement on the same SAW platform. Expressions for individual contributions from the mass loading, film swelling and viscoelastic effects in SAW vapor sensors are derived, and their implications for the sensor design and operation are discussed. Also, a new SAW comb filter design is proposed that offers possibility for multimode SAW oscillator operation over a decade of frequency variation, and illustrates feasibility for experimental realization of wide bandwidth multifrequency SAW platforms. SN - 1874-9968 UR - https://www.unboundmedicine.com/medline/citation/19403152/Multifrequency_characterization_of_viscoelastic_polymers_and_vapor_sensing_based_on_SAW_oscillators_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0041-624X(09)00033-X DB - PRIME DP - Unbound Medicine ER -