Phospholipids, metallization polymerized vesicles formed

Metallization of Polymerized Vesicles Formed from Mixtures of Zwitterlonic and Negatively Charged Phospholipids... 

The first approach in using vesicle membranes in nanoparticle synthesis was to polymerize vesicles formed from 9 1 and 1 1 mixtures of 1 and 2 in the presence of Pd(NH3)4Cl2. Palladium ions bound to negatively charged phospholipids in bilayer membranes had been previously demonstrated to serve as catalytic sites for electroless metallization (47). Light scattering revealed that bimodal populations of vesicles were formed both from the 9 1 (31 + 15 nm and 114 + 40 nm) and 1 1 (38 + 13 nm and 109 + 41 nm) mixtures. Exposure of the vesicles to UV radiation (254 nm) resulted in the reaction of 33 % + 6% of the lipid monomer when 10 % of 2 was present and 50% + 4% for vesicles containing 50% 2. The differences in the amount of reaction of monomer are probably due to both ion and pH effects. Non-cross linked polymerized vesicle membranes consist of many individual... 

---