SHAPE-CONTROLLED SYNTHESIS OF COLLOIDAL PLATINUM NANOPARTICLES

The shapes and sizes of platinum nanoparticles were controlled by chan ges in the ratio of the concentration of the capping polymer material to the concentration of the platinum cations used in the reductive syn thesis of colloidal particles in solution at room temperature. Tetrahe dral, cubic, irregular-prismatic, icosahedral, and cube-octahedral par ticle shapes were observed, whose distribution was dependent on the co ncentration ratio of the capping polymer material to the platinum cati on. Controlling the shape of platinum nanoparticles is potentially imp ortant In the field of catalysis.