Lower. High y、ener ower Energy energy (100)(100) High (110)(111) Grains ener (111)(110) Fastest growth fcc bcc Surface energy in a growing film depends on the number of bonds the adsorbed atom forms with the substrate (or number unsatisfied) This depends on the crystallography of the surface face and on the type of site occupied(face, edge, corner, crevice) Macroscopically, a curved surface has higher surface energy (more dangling bonds )than a flat surface 6.152J3.155J 156.152J/3.155J 15 Surface energy in a growing film depends on the number of bonds the adsorbed atom forms with the substrate (or number unsatisfied). This depends on the crystallography of the surface face and on the type of site occupied (face, edge, corner, crevice). Macroscopically, a curved surface has higher surface energy (more dangling bonds) than a flat surface