Fabrication of a three-dimensional complex carbon nanoneedle from carbon nanowalls

Abstract A three-dimensional complex carbon nanoneedle has been fabricated from carbon nanowalls by a direct current plasma chemical vapor deposition system. Sample grown on stainless wire substrate pretreated with the mixing powders of diamond and molybdenum exhibits novel three-dimensional complex nanostructure, the center of which is a carbon nanoneedle, and many carbon nanowalls growing from the needle. The density of unique nanostructure emitters was about 5 × 10 7 /cm 2 . The I – V characteristic addressed an emission current density of 314 mA/cm 2 at the electric field of 2.5 V/μm.