Abstract

The work studies the synthesis of carbon nanotubes by chemical vapor deposition using a thin-film nickel-based catalyst. The size distributions of all catalyst nanoparticles are compared with the distribution of particles from which carbon nanotube growth is observed. It is established that in this mode nanotubes grow mainly from particles of 7 to 19 nm, and nanotubes rarely grow from particles outside this size range. A thermodynamic model of the solubility of carbon in nickel nanoparticles is developed and it is shown that for each set of parameters of the synthesis process there is a critical minimum size of the catalyst nanoparticle in which carbon can dissolve.

中文翻译：

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随着碳纳米管的生长，镍催化剂中的碳溶解度

摘要

该工作研究了使用薄膜镍基催化剂通过化学气相沉积法合成碳纳米管的方法。将所有催化剂纳米颗粒的尺寸分布与观察到碳纳米管生长的颗粒的分布进行比较。可以确定的是，在这种模式下，纳米管主要从7到19 nm的颗粒中生长，而纳米管很少从该尺寸范围以外的颗粒中生长。建立了碳在镍纳米颗粒中溶解度的热力学模型，结果表明，对于合成过程的每组参数，都有一个可以溶解碳的催化剂纳米颗粒的临界最小尺寸。