Sensor technology for hazardous cargo transportation safety.
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2013-08-01
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Abstract:The overall goal of this research project was to develop oxidant vapor detection devices that can be
used to ensure the safety of hazardous freight transportation systems. Two nanotechnology-based
systems originally developed for improvised explosive detection systems will be adapted to this
application. The first of these are dark-blue nanometric tungsten or molybdenum hydrogen bronzes that
are sensitive to all strong oxidants. The second is a titanium oxide nanoparticle-based system that is
extremely sensitive and selective to hydrogen peroxide and organic peroxides. Our hypothesis, based
on preliminary studies, was that we can use the dramatic color change or change in the electronic
properties of hydrogen bronze nanoparticles or titania nanoparticles when exposed to strongly oxidizing
vapors to produce a variety of products for improving the security of hazardous materials transportation
systems. The specific technologies that were targeted were: (1) stick-on color-changing sensors that
will passively detect strong oxidants (2) hand-held sensitive electronic sensors that detect strong
oxidants (3) an electronic “area sensor” that utilizes color changes to identify the presence of strong
oxidant leaks.
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