Chen Zhuo, Yang Yanlian, Wu Zhongyun, Luo Gang, Xie Liming, Liu Zhongfan, Ma Shaojie, Guo Wanlin
Center for Nanoscale Science and Technology (CNST), College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, PRC.
J Phys Chem B. 2005 Mar 31;109(12):5473-7. doi: 10.1021/jp045796t.
We report a novel electric-field-enhanced chemical assembly approach for fabricating highly aligned SWNT arrays on a solid surface with remarkably improved efficiency and packing density, which is very important for the real applications of carbon nanotube arrays. With the enhancement of the electric field, the assembling kinetics of SWNTs is remarkably speeded up to effectively decrease the assembling time, and the packing density can even exceed the saturated density of conventional assembly method by four times within only half an hour. The molecular dynamics simulation results illustrated the alignment of SWNTs with their long axes along the electric flux in solution, leading to the increase of packing density and efficiency through overcoming the steric hindrance of the "giant" carbon nanotubes.
我们报道了一种新型的电场增强化学组装方法，用于在固体表面制备高度排列的单壁碳纳米管（SWNT）阵列，该方法具有显著提高的效率和堆积密度，这对于碳纳米管阵列的实际应用非常重要。随着电场增强，SWNTs的组装动力学显著加快，有效缩短了组装时间，并且堆积密度在仅半小时内甚至可以比传统组装方法的饱和密度高出四倍。分子动力学模拟结果表明，SWNTs在溶液中其长轴沿电通量方向排列，通过克服“巨型”碳纳米管的空间位阻，导致堆积密度和效率增加。
