Field-Emission Properties of Aligned Carbon Nanotubes
Field-Emission Properties of Aligned Carbon Nanotubes
复制标题
定向碳纳米管的场发射特性
DOI：
10.1143/jjap.39.l925
复制
发表时间：
2000
影响因子：
1.5
通讯作者：
Huang
中科院分区：
文献类型：
--
作者：
W. Hong;H. Shih;S. Tsai;Chen;F. Tarntair;Huang
利用偏压增强型微波等离子体化学气相沉积法制备了致密、分离良好、定向排列的碳纳米管。在发射电流密度为10µA/cm2时，在PdCl2中浸泡1分钟、20分钟和40分钟的开启电场分别约为3.35 V/µm、2.54 V/µm和3.54 V/µm。在5V/µm电场下，碳纳米管的发射电流密度分别为0.97 mA/cm2、4.5 mA/cm2和0.44 mA/cm2。在此条件下制备的定向碳纳米管具有较高的发射电流，这归因于在此条件下形成的纳米管密度更高、形状更锐利。
Dense, well-separated, and aligned carbon nanotubes have been prepared via bias-enhanced microwave plasma chemical vapor deposition. The turn-on fields defined at the emission current density of 10 µA/cm2 are about 3.35 V/µm, 2.54 V/µm, and 3.54 V/µm, for the immersion times in PdCl2 of 1 min, 20 min, and 40 min, respectively. The corresponding emission current densities are about 0.97 mA/cm2, 4.5 mA/cm2, and 0.44 mA/cm2 at the electric field of 5 V/µm. The higher emission current obtained from the aligned carbon nanotubes for the immersion time of 20 min is ascribed to the denser and sharper nanotubes formed in this condition.