石墨基底上垂直生长碳纳米管为芯的碳锥结构

Vertical growth of conical carbon cone with carbon nanotube core on graphite substrate

采用一种改进的化学气相沉积方法,成功地在石墨基底上自组装生长出以碳锥为支撑的、碳纳米管为芯的新型功能材料.该结构的材料可以用作扫描电子显微镜探针和场发射电子显微镜的针尖.利用电子显微镜研究了不同合成条件对该碳纳米管与碳锥结构生长的影响,给出了最优生长条件,并讨论了生长机制.

Using the chemical vapor deposition method, a structure of carbon cones was vertically grown on graphite substrate, where a carbon nanotube was synthesized as the core of the carbon cone and protruded out at the carbon cone＇ s tip. This structure can serve as a field emission device or a probe of scanning probe microscope. With the help of the electron microscope, the optimum growth conditions were determined, and the growth mechanism was discussed.