Ag Nanoparticles Array and Ordered Nanoshells Synthesized by Nanosphere Lithography

Through using floating-transferring method modified by introduction of a slide,the monodisperse PS particles can self-assemble to two-dimensional(2D) colloidal crystals with compact hexagonal structure under appropriate conditions.The experimental results indicate that a ordered arrangement region with a large area of 50 μm×50 μm is obtained besides a few of line defects.Based on a combination of nanosphere lithography and e-beam evaporation deposition technique,triangular shaped silver nanoparticles arrays have been fabricated successfully when PS colloidal crystals are served as mask.Simultaneously,PS nanospheres can be regarded as scrificial nanosphere template to guide the formation of bowl-shaped nanoshells,providing a facile method to synthesize such nanostructure.This approach can be expanded to other materials.Additionally,different sizes of the latex spheres can be chosen to produce triangular nanoparticles array and nanoshells with other sizes.