The present invention includes a method for preparing polymer hydrogel spherical particles on a nanometer scale (nanogels). The method includes encapsulating hydrogel-forming components into liposomes, diluting the large unilamellar liposomes suspension to prevent polymerization outside the liposomes,...http://www.google.com.au/patents/US7943067?utm_source=gb-gplus-sharePatent US7943067 - Nanogels and their production using liposomes as reactors
