Growth of Silica Shells on Metal Nanoparticles

Silica coating of metal colloids presents the difficulty of a chemical mismatch between the core and the shell materials. Liz-Marzin and Philipse first approached the synthesis of Au Si02 particles through borohydride reduction of AuCU in the presence 

Other methods have been devised for the preparation of Ag Si02, such as consecutive reactions within microemulsion droplets, or the reduction of Ag by N,N-dimethylformamide (DMF) in the presence of an amino-silane. However, none of these methods have been used for systematic studies until now. 

---