抄録
Graphite surfaces were sputtered by Ar+ ions with and without a simultaneous Ni supply at room temperature. The sputtered surface without a Ni supply was covered with densely distributed conical protrusions and aligned single carbon nanofibers (CNFs) grew on the respective tips, whereas Ar+-sputtered surfaces with a simultaneous Ni supply were characterized by rod-like and nanofibrous structures, depending on the Ni content of the nanostructures. Pristine CNFs without a metal supply were characterized as the amorphous nature, while the Ni-included nanorods and CNFs were featured as polycrystalline nature and consisted of both carbon and Ni. Thus, the shape and crystalline structure of sputter-induced nanostructures were strongly affected by Ni supply. A field emission characteristic of Ni-included CNFs was also investigated.
