General Encapsulation of Core-Shell Nanoparticles by Metal Nanoshell in Colloids

We demonstrate the use of Au@PSPAA core-shell nanoparticles as seeds to grow metal nanoshell in colloidal system which is a facile and general method. The shell thickness and roughness were controlled by several factors, such as the type of surfactant, the ligand concentration, the quantity of the precursor, and the type of reducing agent. Different kinds of metal nanoshell encapsulation hase been achieved in colloidal system which is critical to its further optial perperties study. We believe that the present method could be applied to fabricate/design more complex and anisotropic particles containing multi shells and the relative applications.