Metal-loaded polymer films for chemical sensing of ES&H-related pollutants Metadata

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Title

  • Main Title Metal-loaded polymer films for chemical sensing of ES&H-related pollutants

Creator

  • Author: Martin, S.J.
    Creator Type: Personal
  • Author: Frye, G.C.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Assistant Secretary for Environment, Safety, and Health.
    Contributor Type: Organization
    Contributor Info: USDOE Assistant Secretary for Environment, Safety, and Health, Washington, DC (United States)

Publisher

  • Name: Sandia National Laboratories
    Place of Publication: Albuquerque, New Mexico
    Additional Info: Sandia National Labs., Albuquerque, NM (United States)

Date

  • Creation: 1997-03-01

Language

  • English

Description

  • Content Description: This report summarizes the results of a Laboratory Directed Research and Development (LDRD) effort to study and model surface acoustic wave (SAW) devices for environmental applications. The response of polymer-coated SAW devices to temperature changes and polymer vapor absorption is examined. A perturbational approach is used to relate velocity and attenuation responses to film translational and strain modes generated by the SAW. Two distinct regimes of film behavior arise, causing different SAW responses. For glassy films, displacement is nearly uniform across the film thickness, varying only in the direction of propagation. A model developed to predict velocity and attenuation in this regime, reduces to the familiar Tiersten (Wohltjen) equation for purely elastic films. For elastomeric (rubbery) films, inertial effects cause a phase lag to occur across the film for shear displacements. A model to account for these cross-film displacement gradients predicts a characteristic resonant response when the film phase shift reaches np/2, where n is an odd integer. These model predictions are compared with measured responses from polyisobutylene-coated SAW devices as temperature is varied and during exposure to high vapor concentrations.
  • Physical Description: 73 p.

Subject

  • Keyword: Attenuation
  • Keyword: Organic Polymers
  • Keyword: Phase Shift
  • Keyword: Absorption
  • Keyword: Thickness
  • Keyword: Vapors
  • Keyword: Pollutants
  • Keyword: Measuring Instruments
  • Keyword: Temperature Dependence
  • Keyword: Detection
  • Keyword: Electric Conductivity
  • Keyword: Shear
  • Keyword: Velocity
  • Keyword: Films
  • Keyword: Monitors
  • STI Subject Categories: 44 Instrumentation, Including Nuclear And Particle Detectors
  • Keyword: Performance

Source

  • Other Information: PBD: Mar 1997

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE97004160
  • Report No.: SAND--97-0619
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/459905
  • Office of Scientific & Technical Information Report Number: 459905
  • Archival Resource Key: ark:/67531/metadc675600

Note

  • Display Note: OSTI as DE97004160