Novel micro-calorimetric spectroscopy for mine detection

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The authors have developed a novel micro-calorimetric spectroscopy technique that can be used in mine detection applications. In this technique target molecules are allowed to adsorb on the surface of sub-femtojoule sensitive micromechanical thermal detectors. The adsorption of molecules on the thermal detector surface causes a differential surface stress resulting in an initial trigger. By exposing each element in an array of thermal detectors to different photon wavelengths, an extremely sensitive and unique photothermal signature response can be obtained. The authors present their results on target chemicals adsorbed on the detector surface at sub-monolayer coverage levels. They will present infrared ... continued below

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10 p.

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Datskos, P.G.; Rajic, S.; Egert, C.M. & Datskou, I. March 1, 1998.

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Description

The authors have developed a novel micro-calorimetric spectroscopy technique that can be used in mine detection applications. In this technique target molecules are allowed to adsorb on the surface of sub-femtojoule sensitive micromechanical thermal detectors. The adsorption of molecules on the thermal detector surface causes a differential surface stress resulting in an initial trigger. By exposing each element in an array of thermal detectors to different photon wavelengths, an extremely sensitive and unique photothermal signature response can be obtained. The authors present their results on target chemicals adsorbed on the detector surface at sub-monolayer coverage levels. They will present infrared photothermal spectra for trace concentrations of diisopropyl methylphosphonate (DIMP), and trinitrotoluene (TNT) over the wavelength region 2.5 to 14.5 microns. They found that in the wavelength region 2.5 to 14.5 microns the photothermal spectra of DIMP and TNT exhibit a number of peaks and are in excellent agreement with infrared absorption spectra found in the literature. Chemical detectors based on micro-calorimetric spectroscopy can be used to sensitively sense small number of molecules adsorbed on a thermal detector surface. The photothermal signature resulting from photon irradiation can be used for improved chemical characterization.

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10 p.

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OSTI as DE98004848

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  • 3. symposium on technology and the mine problem, Monterey, CA (United States), 6-10 Apr 1998

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  • Other: DE98004848
  • Report No.: ORNL/CP--97377
  • Report No.: CONF-980427--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 653986
  • Archival Resource Key: ark:/67531/metadc709611

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  • March 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 22, 2016, 12:34 p.m.

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Datskos, P.G.; Rajic, S.; Egert, C.M. & Datskou, I. Novel micro-calorimetric spectroscopy for mine detection, article, March 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc709611/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.