Formation of Carbon Nanotubes and Cubic and Spherical Nanocages
Formation of Carbon Nanotubes and Cubic and Spherical Nanocages
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DOI：
10.1021/jp046702i
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发表时间：
2004-11
影响因子：
3.3
通讯作者：
Jianwei Liu;Liqiang Xu;Wu Zhang;Wanjuan Lin;Xiangying Chen;A. Z. Wang;Y. Qian
中科院分区：
文献类型：
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作者：
Jianwei Liu;Liqiang Xu;Wu Zhang;Wanjuan Lin;Xiangying Chen;A. Z. Wang;Y. Qian
采用乙醇热还原法制备了竹节状碳纳米管、立方体和球形碳纳米笼。扫描电子显微镜研究表明，碳纳米管占主导地位。透射电子显微镜研究表明，合成的样品主要含有竹节状碳纳米管，以及一些碳立方和球形纳米笼。高分辨率透射电子显微镜的详细检查表明，竹形碳纳米管的壁由相对于管轴倾斜的石墨烯平面组成，其层间距约为0.335 nm。实验结果表明，竹节状碳纳米管的生长机制遵循基本生长模型，立方和球形碳纳米笼的出现是由于石墨片弯曲，试图消除生长结构边缘的高能悬挂键。
Three types of carbon nanomaterials, including bamboo-shaped carbon nanotubes and cubic and spherical carbon nanocages, have been prepared by an ethanol thermal reduction process. Scanning electron microscopy studies showed that carbon nanotubes predominated. Transmission electron microscopy investigations indicated that as-synthesized sample contained mostly bamboo-shaped carbon nanotubes, with some carbon cubic and spherical nanocages. Detailed examination of high-resolution transmission electron micrography showed that the walls of bamboo-shaped carbon nanotubes consisted of oblique graphene planes with respect to the tube axis, whose interlayer spacing was about 0.335 nm. The experimental results suggest that the growth mechanism of the bamboo-shaped carbon nanotubes follows the base growth model and the appearance of cubic and spherical carbon nanocages arises from the graphitic sheets bending in an attempt to eliminate the highly energetic dangling bonds present at the edge of the growing structure....