title: Low cost fabrication of diamond nano-tips on porous anodic alumina by hot filament chemical vapor deposition and the field emission effects.
abstract: A novel growth method for diamond nano-tips on porous anodic alumina (PAA) by hot filament chemical vapor deposition has been investigated for the first time. Before diamond film deposition could be carried out, nano-diamond particles were deposited onto the pore surface of PAA by electrophoretic deposition at the nucleation sites. Diamond nano-tips were then successfully formed by the shape of porous alumina. The results show that a diamond nano-tip with a smaller radius has superior effects of field emission. Its threshold field and current density are 1.2 V µm(-1) and 4.0 mA cm(-2), respectively, for the case of a tip radius of about 20-30 nm.
authors.affiliation: Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu City, Taiwan. hytsai@pme.nthu.edu.tw
authors.forename: Hung-Yin
authors.initials: HY
authors.lastname: Tsai
authors.forename: Hsuan-Chun
authors.initials: HC
authors.lastname: Liu
authors.forename: Jhih-Hong
authors.initials: JH
authors.lastname: Chen
authors.forename: Chih-Cheng
authors.initials: CC
authors.lastname: Yeh