US Patent 7455825 - Manufacture of metal sulfide nanocrystals

http://www.freepatentsonline.com/7455825.html

This patent from Samsung teaches a method for making sulfide quantum dots (e.g. CdS, ZnS and PbS) with a more uniform size. Claim 1 reads:

1. A method for manufacturing metal sulfide nanocrystals by reacting a metal precursor and an alkyl thiol in a solvent, wherein the alkyl thiol reacts with the metal precursor to form the metal sulfide nanocrystals.