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                            Library & Multimedia
 Nanoscale Ex Situ Thermal Impulse Sensors for Structural Fire Forensics
NCJ Number
              253123
Journal

*Applied Spectroscopy* Volume: 9 Issue: 72 Dated: 2018 Pages: 1310-1321
Author(s)
          Benjamin. R. Anderson;
                        Natalie Gese;
                        Ray Gunawidjaja;
                        Hergen Eilers
Date Published

2018
Length
              12 pages
Annotation
              This study developed nanoscale ex situ thermal impulse (i.e., the temperature and duration of a heating event) sensors for structural fire forensics, using a mixture of two lanthanide-doped oxide precursors (precursor Eu:ZrO2 and precursor Dy:Y2O3) that undergo irreversible phase changes when heated.
Abstract
              These changes were probed using photoluminescence (PL) spectroscopy, with the PL spectra being dependent on the thermal impulse (TI) experienced by the sensors. By correlating the PL spectra to different in-lab TIs, researchers produced a spectroscopic calibration for the sensors. This calibration enabled the determination of an unknown TI of a heating event, using only the PL spectrum of the heated TI sensors. This study reports on the calibration of these sensors for isothermal heating durations up to 600 s and isothermal temperatures up to 1273 K. Using this calibration, the study also demonstrated the sensors ability to determine an unknown TI and determine their functionality when dispersed into paint, which is heated in the presence of drywall. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2015-DN-BX-K073


  
  
        
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        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Temperature Sensors Embedded in Paint for Fire Debris Analysis and Arson Scene Investigations
    
  
  
Date Published: January 1, 2018
    
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