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Standoff detection of explosive residues using photothermal microcantilevers

Appl. Phys. Lett. 92, 134102 (2008); doi:10.1063/1.2901145

Published 1 April 2008

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C. W. Van Neste, L. R. Senesac, D. Yi, and T. Thundat
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6123, USA
Standoff detection of trace explosives is gaining attention due to its immediate relevance in countering terrorist threats based on explosive devices. However, most currently available standoff techniques rely on expensive, complex, and bulky equipment. We have demonstrated highly selective and sensitive standoff detection of explosive residues on surfaces by using photothermal spectroscopy carried out with bimaterial microcantilever sensors. The demonstrated sensitivity of the technique, 100  ng/cm2, is sufficient to detect the explosive contamination generally found on explosive devices. The sensitivity of the technique can be further improved by optimizing the bimaterial cantilever and by using higher intensity infrared sources. ©2008 American Institute of Physics
History: Received 21 December 2007; accepted 3 March 2008; published 1 April 2008
Permalink: http://link.aip.org/link/?APPLAB/92/134102/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.10.Cm
    Micromechanical devices and systems
  • 07.07.Df
    Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
  • 82.80.Kq
    Energy-conversion spectroscopic methods of chemical analysis
  • 42.72.Ai
    Infrared sources
  • YEAR: 2008

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ISSN:
0003-6951 (print)   1077-3118 (online)
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