US Patent 7247375 - Halogen polymer encapsulated nanoparticle

http://www.freepatentsonline.com/7247375.html

Encapsulation of phosphorescent particles by polymers and inorganic materials is a used to avoid quenching of the phosphorescence in oxygen or water containing environments. This patent claims an improvement of such encapsulation for nanoparticles using halogen containing polymers. Claim 1 reads:

1. A phosphorescent particle comprising a phosphorescent material encapsulated in a halogen-containing polymer, wherein the size of the particle is from about 10 nanometers to about 10 micrometers.