Low cost fabrication of diamond nano-tips on porous anodic alumina by hot filament chemical vapor deposition and the field emission effects

被引：14
作者：
Tsai, Hung-Yin [1 ]
Liu, Hsuan-Chun [2 ]
Chen, Jhih-Hong [2 ]
Yeh, Chih-Cheng [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Power Mech Engn, Hsinchu 30013, Taiwan
[2] Natl Taiwan Ocean Univ, Dept Mech & Mechatron Engn, Chilung 20224, Taiwan
来源：
NANOTECHNOLOGY | 2011年 / 22卷 / 23期
关键词：
CARBON NANOTUBES; FILMS; NUCLEATION; MECHANISM; CONES;
D O I：
10.1088/0957-4484/22/23/235301
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 mu m(-1) and 4.0 mA cm(-2), respectively, for the case of a tip radius of about 20-30 nm.
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页数：5
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