论文部分内容阅读
以二甲苯作为碳源、二茂铁作为催化剂前驱体,采用催化裂解法大规模合成了具有不同螺距和螺旋直径、垂直于基底生长的碳纳米管阵列。通过拉曼光谱和高分辨透射电镜测试分析,结果表明,所制备的碳纳米管阵列分布均匀、石墨化程度高,且沿其长度方向具有不同的螺距和螺旋直径。由于在碳纳米管的生长过程中,会伴随着碳五环、碳七环与碳六环的生成,而碳六环是形成石墨晶格的基本结构单元。当碳六环网络结构中出现碳五环和碳七环时,螺旋形的碳纳米管就会形成。实验中螺旋形碳纳米管的产率约为4.5 mg/cm~2·h。螺旋形碳纳米管在高性能传感器、谐振器、纳米机械弹簧、电感等纳米电子器件中具有潜在的应用价值。
Using xylene as a carbon source and ferrocene as a catalyst precursor, a carbon nanotube array with different pitch and helical diameter and perpendicular to the substrate growth was synthesized on a large scale by a catalytic cracking method. The results of Raman spectroscopy and high-resolution transmission electron microscopy showed that the prepared carbon nanotube arrays have uniform distribution, high degree of graphitization and different pitch and helical diameter along their length. The growth of carbon nanotubes is accompanied by the formation of carbon pentacyclic, carbon seven rings and carbon six rings, and carbon six rings are the basic structural units forming the graphite lattice. When carbon rings and carbon rings appear in the carbon six-ring network structure, spiral carbon nanotubes are formed. In the experiment, the yield of spiral carbon nanotubes was about 4.5 mg / cm ~ 2 · h. Spiral carbon nanotubes in the high-performance sensors, resonators, nano-mechanical springs, inductors and other nano-electronic devices has potential applications.