Ren Wencai, Cheng Hui-Ming
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
J Phys Chem B. 2005 Apr 21;109(15):7169-73. doi: 10.1021/jp0448088.
Aligned double-walled carbon nanotube (DWNT) long ropes with a narrow diameter distribution were directly synthesized by sulfur-assisted floating catalytic decomposition of methane. The DWNT ropes are typically up to several centimeters in length and possess good alignment and high purity. High-resolution transmission electron microscopy (HRTEM) images and resonant Raman spectra revealed that the outer and inner tube diameters of the DWNTs are narrowly distributed in the range of 1.7-2.0 and 1.0-1.3 nm, respectively. Moreover, based on the resonant Raman measurements, the electronic properties of the two constituent tubes of the DWNTs were identified. The successful synthesis of such DWNTs opens the possibility for their fundamental studies and further applications as nanomechanical, nanooptical, and nanoelectronic devices.
通过硫辅助甲烷浮动催化分解直接合成了具有窄直径分布的对齐双壁碳纳米管（DWNT）长绳。DWNT长绳通常长达几厘米，具有良好的对齐性和高纯度。高分辨率透射电子显微镜（HRTEM）图像和共振拉曼光谱表明，DWNT的外管和内管直径分别在1.7 - 2.0纳米和1.0 - 1.3纳米的范围内窄分布。此外，基于共振拉曼测量，确定了DWNT的两个组成管的电子性质。这种DWNT的成功合成开启了对其进行基础研究以及作为纳米机械、纳米光学和纳米电子器件进一步应用的可能性。
