Resonant surface acoustic wave chemical detector

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

Title: 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.

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Research Organization:: Sandia National Lab. (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

Resource Relation:: Patent File Date: 2014 Apr 03

Country of Publication:: United States

Language:: English

References (33)

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