Resonant surface acoustic wave chemical detector

Brocato, Robert W.; Brocato, Terisse; Stotts, Larry G.

Resonant surface acoustic wave chemical detector

Patent · Tue Aug 08 00:00:00 EDT 2017

OSTI ID:1374544

Brocato, Robert W.; Brocato, Terisse; Stotts, Larry G.

Apparatus for chemical detection includes a pair of interdigitated transducers (IDTs) formed on a piezoelectric substrate. The apparatus includes a layer of adsorptive material deposited on a surface of the piezoelectric substrate between the IDTs, where each IDT is conformed, and is dimensioned in relation to an operating frequency and an acoustic velocity of the piezoelectric substrate, so as to function as a single-phase uni-directional transducer (SPUDT) at the operating frequency. Additionally, the apparatus includes the pair of IDTs is spaced apart along a propagation axis and mutually aligned relative to said propagation axis so as to define an acoustic cavity that is resonant to surface acoustic waves (SAWs) at the operating frequency, where a distance between each IDT of the pair of IDTs ranges from 100 wavelength of the operating frequency to 400 wavelength of the operating frequency.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC04-94AL85000

Assignee:: National Technology & Engineering Solutions of Sandia, LLC

Patent Number(s):: 9,726,646

Application Number:: 14/244,767

OSTI ID:: 1374544

Country of Publication:: United States

Language:: English

References (7)

Analysis and Design of Low-Loss SAW Filters Using Single-Phase Unidirectional Transducers Campbell, C.K.; Saw, C.B. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 34, Issue 3, p. 357-367 https://doi.org/10.1109/T-UFFC.1987.26954	journal	May 1987
SAW devices-sensitivity enhancement in going from 80 MHz to 1 GHz Dickert, Franz L.; Forth, Peter; Bulst, Wolf-Eckehard Sensors and Actuators B: Chemical, Vol. 46, Issue 2, p. 120-125 https://doi.org/10.1016/S0925-4005(98)00097-5	journal	February 1998
High-frequency stability oscillator for surface acoustic wave gas sensor He, Shitang; Wang, Wen; Li, Shunzhou Acoustical Science and Technology, Vol. 30, Issue 1, p. 7-12 https://doi.org/10.1250/ast.30.7	journal	January 2009
High frequency SAW correlator module Brocato, R.; Heller, E.; Onidahl, G. 53rd Electronic Components and Technology Conference, 2003. Proceedings https://doi.org/10.1109/ECTC.2003.1216318	conference	August 2003
High frequency SAW stabilized oscillators for chemical agents sensors Jasek, K.; Pasternak, M. The European Physical Journal Special Topics, Vol. 154, Issue 1, p. 97-102 https://doi.org/10.1140/epjst/e2008-00524-3	journal	February 2008
Surface acoustic wave sensors to detect volatile gases by measuring output phase shift Yoo, Beom-Keun; Park, Yong-Wook; Kang, Chong-Yun Journal of Electroceramics, Vol. 17, Issue 2-4, p. 1013-1017 https://doi.org/10.1007/s10832-006-0470-4	journal	December 2006
Optimized SAW chemical sensor with microfluidic packaging Brocato, Robert W.; Brocato, Terisse A.; Wendt, Joel R. 2012 IEEE 62nd Electronic Components and Technology Conference https://doi.org/10.1109/ECTC.2012.6248948	conference	May 2012

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