【摘要】 利用以石墨为电极的直流电弧放电法 ,在氢气氛围下制备出了纳米碳管 .实验结果表明 ,在阴极上形成的碳素堆积物中 ,其前端表面及其内部都生成了纳米碳管 .经扫描电子显微镜和透射电子显微镜观察分析发现 ,所生成的纳米碳管其形态构造在氢气的压强和直流电弧电流发生变化时 ,没有显著差异 .在氢气压强为 11999Pa ,直流电弧电流为 6 0A时 ,得到了大量的、管径较均匀、直而长的纳米碳管 .更多还原

【Abstract】 Making use of graphite as electrode,we have prepared carbon nanotubes by the direct current arc\|discharge method.The experimental results indicate that the carbon nanotubes are generated on the front\|end surface and within the carbon accretion on the cathode.Using SEM adn TEM,we find no significant difference for the shapes and the structures of the generated carbon nanotubes when the pressure and the direct arc\|current change.Under the pressure of hydrogen gas 11999?Pa and direct arc\|current 60?A,we obtain a large number of straight and long carbon nanotubes with uniform calibers.更多还原