Effect of Oxygen Plasma Alumina Treatment on Growth of Carbon Nanotube Forests

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• 作者：Junwei Yang ; Santiago Esconjauregui ; Rongsie Xie ; Hisashi Sugime ; Taron Makaryan ; Lorenzo D鈥橝rsi茅 ; David Leonardo Gonzalez Arellano ; Sunil Bhardwaj ; Cinzia Cepek ; John Robertson
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：August 14, 2014
• 年：2014
• 卷：118
• 期：32
• 页码：18683-18692
• 全文大小：598K
• ISSN：1932-7455

文摘

We use oxygen plasma to increase the height of forests from 0.2 to >2 mm. The effectiveness of treating alumina by oxygen plasma, prior to iron nanoparticle formation, is studied using cycles of nanotube growth, nanotube burning, and regrowth. This demonstrates that plasma-treated alumina is more resistant to iron bulk diffusion than an untreated one. Secondary ion mass spectroscopy shows there is negligible iron diffusion into the bulk of treated alumina. Plasma treatment of catalyst supports is potentially useful for growth of ultra-high-density nanotube forests for applications such as interconnects in integrated circuits and heat sinks.