Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu City, Taiwan.
Nanotechnology. 2011 Jun 10;22(23):235301. doi: 10.1088/0957-4484/22/23/235301. Epub 2011 Apr 7.
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.
首次研究了在多孔阳极氧化铝（PAA）上通过热丝化学气相沉积生长金刚石纳米尖端的新方法。在进行金刚石薄膜沉积之前，通过在成核点处的电泳沉积将纳米金刚石颗粒沉积到 PAA 的孔表面上。然后，通过多孔氧化铝的形状成功形成了金刚石纳米尖端。结果表明，半径较小的金刚石纳米尖端具有更好的场发射效果。对于半径约为 20-30nm 的尖端，其阈值场和电流密度分别为 1.2V µm(-1)和 4.0mA cm(-2)。
