Patent ID: 9138711
Filing Date: 2015-09-22
Classification: A61K,B01J,B82Y,C09K,H01L

Abstract:
1. A population of nanoparticles, comprising: a plurality of core/shell nanocrystals, each including, a semiconductor core; an intermediate semiconductor shell layer comprising more than one monolayer disposed over the semiconductor core; an external semiconductor shell layer disposed over the intermediate semiconductor shell layer; and a hydrophilic organic layer in direct contact with the external semiconductor shell layer, wherein the hydrophilic organic layer comprises a plurality of hydrophilic ligands, each comprising a hydrophilic functional group that imparts aqueous dispersibility to the nanocrystal, wherein the hydrophilic ligands are selected from dipeptides, tridentate thiol ligands, and functionalized phosphonate or phosphinate ligands, wherein the tridentate thiol ligands are selected from the group consisting of compounds of Formula I, II, III, IV, V, and VI: wherein R R R 6 is H or a polyethylene glycol moiety.