Accession Number : AD1045684


Title :   Phonon Confinement Effect in TiO2 Nanoparticles as Thermosensor Materials


Descriptive Note : Technical Report,23 Jun 2009,30 Sep 2015


Corporate Author : Rensselaer Polytechnic Institute Troy United States


Personal Author(s) : Huang,Liping


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1045684.pdf


Report Date : 24 Jan 2018


Pagination or Media Count : 16


Abstract : TiO2 or ZnO nanoparticles (NPs) have a very strong finite-size dependency in their Raman spectra or photoluminescence (PL) spectra due to the phonon confinement effect or the quantum confinement effect. Together with a fast grain growth kinetics and a high stability under high temperature and pressure, they can forensically retain the complete thermal history of an event. By spatially distributing these NPs during thermal events such as blasts or weapon tests, a spatially and temporally non-uniform thermal environment can be determined by a direct read off their Raman or PL spectra at various locations.


Descriptors :   nanoparticles , phonons , raman spectra , photoluminescence , THERMAL PROPERTIES


Subject Categories : Miscellaneous Materials
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE