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Research & Reviews: Journal of Material Sciences | ISSN: 2321-6212 | Volulme 6
November 07-08, 2018 | Atlanta, USA
Materials Science and Engineering
15
th
International Conference and Exhibition on
Applied Crystallography
3
rd
International Conference on
&
Rugged nanoparticle tracers for mass tracking in explosive events
Lance Hubbard
Pacific Northwest National Laboratory, USA
T
racing the flow of solid matter during explosions requires elements with uniquely identifiable signatures. Pigments
tagged with luminescent core-shell nanoparticles (CSNPs) can have tunable photoluminescence (PL) depending on the
material composition and core/shell thicknesses. The particles can be ruggedized with thick silica encapsulate to protect the
luminescent inner architecture during finite periods of elevated temperatures. Incorporation of the CSNPs into a matrix allows
for identification (ID) of debris originating from the tagged material. Five types of zinc sulfide quantum dots were synthesized
and isolated in silica shells. The shelled dots were molecularly bound to five commercially obtained luminescent powders. The
combination of 5 dots and 5 powders enables a matrix of 25 unique pigments that can be applied for mass tracking and model
confirmation. The 25 pigments have spectral components that luminesce under different wavelengths. The use of commercial
pigments enables field identification for collection and CSNPs allow for laboratory confirmation of the origin of the mass. The
bound powders and luminescent CSNPs were suspended in a hydrated silica gel pending incorporation into materials. Finally,
the mass tracking pigments were incorporated into temperature resistance paints, synthetic stone and controlled porous glass.
The incorporation of temperature resistant CSNPs and commercial pigments has enabled unique identifiers, which allow for
the tracking of mass through explosive events and other inaccessible environments.
Biography
Lance Hubbard has completed his PhD in Chemical Engineering from the University of Arizona. He is currently a staff materials scientist at Pacific Northwest National
Laboratory focusing on nanomaterial integration and semiconductor-based detector design. He has papers and patents related to nanomaterials integration into
semiconductor processes, corrosion of ceramics under monatomic oxygen, electroless deposition of metals and Raman/radio interference based spectroscopy for
industrial process control. Current research includes studies on nanoparticles for mass tracking, production modeling of uranium fuel foils and AlGaN avalanche
photodiode structures.
lance.hubbard@pnnl.govLance Hubbard, Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C8-035