Nanoscale metal shells and coreshells have many potential uses and in some applications offer significant advantages over nanoparticles, such as reduced costs, lower densities, and, in some cases, special optical properties. Platinum nanostructures have been well known for various catalytic applications. Herein, we applied photocatalytic tin(IV) metalized porphyrins, which are located at the interface of hard (silica)/soft (organic solvents) templates and the aqueous environment, to synthesis Platinum coreshell/nanoshell structures. Platinum is reduced at the interface through porphyrin assisted photocatalytic reduction under light illumination at the beginning. As the seeds become large enough, through an autocatalytic reduction process, they grow into a dendritic form, join with each other, and finally form a closed structure on the template. In the case of coreshell structure, the porphyrin electrostatically bind on the silica surface. In the case of nanoshell synthesis, an O/W nanoemulsion template is produced by using a novel functional surfactant of tin(IV)-lipoporphyrin complex. No cosurfactant is needed to stabilize nanoemulsion because of the lipoporphyrin's intrinsic structural properties. Platinum shells containing magnetic interior are made simply by dispersing Fe3O4 nanoparticles in the organic nanodroplets during the emulsion preparation. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. Department of Energy's National Nuclear Security Administration under Contract No. DEAC04-94AL85000.