Capillary absorption of metal nanodroplets by single-wall carbon nanotubes
Capillary absorption of metal nanodroplets by single-wall carbon nanotubes
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DOI：
10.1021/nl080875s
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发表时间：
2008-08-01
期刊：
影响因子：
10.8
通讯作者：
Hendy, S. C.
中科院分区：
文献类型：
--
作者：
Schebarchov, D.;Hendy, S. C.
我们提出了一个简单的模型，证明了毛细管吸收的非润湿液体纳米颗粒的可能性，由碳纳米管（CNT）的协助下的作用的拉普拉斯压力，由于液滴表面张力。我们用分子动力学模拟测试了这个模型，发现与理论非常吻合，这表明对于给定的纳米管半径，存在一个临界尺寸，低于该尺寸，金属液滴将被吸收。该模型还解释了最近观察到的非润湿铜纳米液滴的碳纳米管的毛细管吸收。这一发现对我们理解从金属催化剂颗粒生长CNT具有影响，并提出了制造复合金属-CNT材料的新方法。
We present a simple model that demonstrates the possibility of capillary absorption of nonwetting liquid nanoparticles by carbon nanotubes (CNTs) assisted by the action of the Laplace pressure due to the droplet surface tension. We test this model with molecular dynamics simulation and find excellent agreement with the theory, which shows that for a given nanotube radius there is a critical size below which a metal droplet will be absorbed. The model also explains recent observations of capillary absorption of nonwetting Cu nanodroplets by carbon nanotubes. This finding has implications for our understanding of the growth of CNTs from metal catalyst particles and suggests new methods for fabricating composite metal-CNT materials.