US Patent 7318957 - Semiconductor nanoparticles coated with electron releasing material

http://www.freepatentsonline.com/7318957.html

This patent from Hitachi discloses coating methods for nanocrystals that provide a multiple organic coating that provides improvements in the solubility and fluorescent properties of the nanocrystals. Claim 1 reads:

1. A semiconductor nanoparticle comprising a core with a core surface modified to include at least one electron-releasing group thereon; and an organic material layer formed over said modified core surface, wherein said modified core surface including at least one electron-releasing group and said organic material layer are made of different materials.