A water soluble semiconductor nanocrystal capable of light emission is provided, including a quantum dot having a selected band gap energy, a layer overcoating the quantum dot, the overcoating layer comprised of a material having a band gap energy greater than that of the quantum dot, and an organic...http://www.google.fr/patents/US6426513?utm_source=gb-gplus-shareBrevet US6426513 - Water-soluble thiol-capped nanocrystals
