Ceramic encapsulated nanoparticle-based covert taggants for tracking of materiel

We propose to develop nanoparticle-based taggants that are stable and non-toxic, and are capable of producing UV, visible and IR signatures. Combining nanoparticles with different compositions will provide the ability to produce a multitude of unique markers, each specific to a certain combination of nanoparticles. The proposed program to develop covert taggant particles builds upon recent research by our University STTR partner, who has developed core-shell structured non-toxic and highly fluorescent nanoparticles. The ceramic outer shell imparts stability to the nanoparticles against the ambient, including moisture and temperature extremes, thereby overcoming barriers associated with the use of organic dyes. The proposed effort also builds upon work done at NEI Corporation, where we have developed and commercialized processes for producing core-shell nanoparticles, along with surface modification technologies to render nanoparticles compatible with the matrix in which they are dispersed. The Phase I program will deliver to the Army sample quantities of nanoparticles with the desired fluorescent and adhesion characteristics. The emphasis of the Phase I effort will be on incorporating different chromophores within the nanoparticles, and characterizing the spectral response, along with rendering the particle ensemble adherent. A provider of covert tagging technology solutions is a partner in this effort as well, thereby providing an early path to implementing the technology in the field.