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Title: Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase

Abstract

A chemical sensor (1) includes two or more pairs of interdigital electrodes (10) having different periodicities. Each pair is comprised of a first electrode (10a) and a second electrode (10b). The electrodes are patterned on a surface of a piezoelectric substrate (12). Each pair of electrodes may launch and receive various acoustic waves (AW), including a surface acoustic wave (SAW), and may also launch and receive several acoustic plate modes (APMs). The frequencies associated with each are functions of the transducer periodicity as well as the velocity of the particular AW in the chosen substrate material. An AW interaction region (13) exists between each pair of electrodes. Circuitry (20, 40) is used to launch, receive, and monitor the propagation characteristics of the AWs and may be configured in an intermittent measurement fashion or in a continuous measurement fashion. Perturbations to the AW velocity and attenuation are recorded at several frequencies and provide the sensor response.

Inventors:
 [1];  [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
868887
Patent Number(s):
5235235
Assignee:
United States of America as Represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
multiple-frequency; acoustic; wave; devices; chemical; sensing; materials; characterization; gas; liquid; phase; sensor; pairs; interdigital; electrodes; 10; periodicities; pair; comprised; electrode; 10a; 10b; patterned; surface; piezoelectric; substrate; 12; launch; receive; various; waves; including; plate; modes; apms; frequencies; associated; functions; transducer; periodicity; velocity; particular; chosen; material; interaction; region; 13; exists; circuitry; 20; 40; monitor; propagation; characteristics; aws; configured; intermittent; measurement; fashion; continuous; perturbations; attenuation; recorded; provide; response; acoustic plate; chemical sensing; plate modes; surface acoustic; chemical sensor; acoustic wave; substrate material; liquid phase; acoustic waves; wave device; receive various; piezoelectric substrate; chosen substrate; plate mode; frequency acoustic; wave devices; interaction region; materials characterization; continuous measurement; /310/73/

Citation Formats

Martin, Stephen J., and Ricco, Antonio J. Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase. United States: N. p., 1993. Web.
Martin, Stephen J., & Ricco, Antonio J. Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase. United States.
Martin, Stephen J., and Ricco, Antonio J. Fri . "Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase". United States. https://www.osti.gov/servlets/purl/868887.
@article{osti_868887,
title = {Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase},
author = {Martin, Stephen J. and Ricco, Antonio J.},
abstractNote = {A chemical sensor (1) includes two or more pairs of interdigital electrodes (10) having different periodicities. Each pair is comprised of a first electrode (10a) and a second electrode (10b). The electrodes are patterned on a surface of a piezoelectric substrate (12). Each pair of electrodes may launch and receive various acoustic waves (AW), including a surface acoustic wave (SAW), and may also launch and receive several acoustic plate modes (APMs). The frequencies associated with each are functions of the transducer periodicity as well as the velocity of the particular AW in the chosen substrate material. An AW interaction region (13) exists between each pair of electrodes. Circuitry (20, 40) is used to launch, receive, and monitor the propagation characteristics of the AWs and may be configured in an intermittent measurement fashion or in a continuous measurement fashion. Perturbations to the AW velocity and attenuation are recorded at several frequencies and provide the sensor response.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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