Castro Suarez, John R.

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    Remote infrared spectroscopy detection of highly energetic materials
    (2015-12) Castro Suarez, John R.; Hernández Rivera, Samuel P.; College of Arts and Sciences - Sciences; Briano Peralta, Julio G.; Mina Camilde, Nairmen; Vega Olivencia, Carmen A.; Department of Chemistry; Torres Lugo, Madeline
    An Open-Path Standoff Detection System was designed using a telescope coupled to a EM27 Fourier Transform infrared spectrometer equipped with a mercury cadmium telluride (MCT) cryocooled detector. Samples of highly energetic substances deposited on metal surfaces were detected using this method. Standoff detection experiments on metal surfaces were carried out in passive and active modes. 2,4,6-trinitrotoluene (TNT) was used as the main target for the studies and aluminum plates as the supporting material. The samples analyzed were placed at different distances (4 to 30 m) for both active and passive mode experiments. All experiments were carried out at room temperature. Several surface temperatures were tested in passive mode standoff detection system. Surface concentrations (50 to 400 ug/cm2 ) were used for both methods of standoff IR detection. Data were analyzed using chemometrics routines. Spectra were submitted to statistical treatments based on partial least squares (PLS) algorithms. Both active and passive mode showed to be useful to record TNT vibrational signatures at distances up to 20 m and 30 m, respectively.
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    Publication
    Open path FTIR standoff detection of high explosives on aluminum substrates
    (2010) Castro Suarez, John R.; Hernández Rivera, Samuel P.; College of Arts and Sciences - Sciences; Vega Olivencia, Carmen A; Mina Camilde, Nairmen; Romañach, Rodolfo; Department of Chemistry; Briano Peralta, Julio G.
    An Open-Path Standoff Detection System was designed using a telescope coupled to a EM27 Fourier Transform infrared spectrometer equipped with a mercury cadmium telluride (MCT) cryocooled detector. Samples of highly energetic substances deposited on metal surfaces were detected using this method. Standoff detection experiments on metal surfaces were carried out in passive and active modes. 2,4,6-trinitrotoluene (TNT) was used as the main target for the studies and aluminum plates as the supporting material. The samples analyzed were placed at different distances (4 to 30 m) for both active and passive mode experiments. All experiments were carried out at room temperature. Several surface temperatures were tested in passive mode standoff detection system. Surface concentrations (50 to 400 ug/cm2 ) were used for both methods of standoff IR detection. Data were analyzed using chemometrics routines. Spectra were submitted to statistical treatments based on partial least squares (PLS) algorithms. Both active and passive mode showed to be useful to record TNT vibrational signatures at distances up to 20 m and 30 m, respectively.