Portable low-power electronic interface for explosive detection using microcantilevers

  • García-Romeo D
  • Pellejero I
  • Urbiztondo M
 et al. 
  • 51

    Readers

    Mendeley users who have this article in their library.
  • 17

    Citations

    Citations of this article.

Abstract

Microcantilevers have been recently revealed as a highly effective technique for gas detection at trace level when acting as chemical sensors. However, an important milestone still remains to achieve a full-scale development in commercial applications: the cumbersome systems traditionally used to read-out its responses. To accomplish this, a portable low-power electronic interface, based on an analog lock-in amplifier processing square signals, which is fully capable of creating the excitation signal as well as obtaining the response values from resonating microcantilevers functionalized with zeolite based coatings has been herein attempted. The so obtained read-out results are in good agreement with the commercial lock-in amplifier's measurements, demonstrating the accuracy and reliability of the electronic interface. Finally, its performance has been validated for 2-nitrotoluene (o-MNT) detection at ppm V level, as an example of an explosive-related molecule, with BEA zeolite coated microcantilevers. Theoretical limit of detection (LOD) values below 100 ppb have been obtained for Co exchanged BEA modified sensors. © 2014 Elsevier B.V.

Author-supplied keywords

  • Explosives
  • Gas sensing
  • Microcantilevers
  • Nanoporous coating
  • Portable lock-in amplifier
  • Zeolites

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free