Abstract: For half-spherical nanoparticles grow symmetrically on a plane metallic substrate in an external uniform electric field,a model of near-field electric potential distribution around nanoparticles is established.Spatial distribution of near-field electric potential is obtained.It shows that electric potential distributions exhibit obvious symmetry,which could serve as the basis for explaining abnormal phenomena related to nanostructured films,as well as reference for application of nanofilm materials.

Key words: nanostructured material, nano-half-sphere, near-field electric potential, numerical calculation