Low-Temperature Growth of Carbon Nanotube Forests Consisting of Tubes with Narrow Inner Spacing Using Co/Al/Mo Catalyst on Conductive Supports

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• 作者：Hisashi Sugime ; Santiago Esconjauregui ; Lorenzo D鈥橝rsi茅 ; Junwei Yang ; Alex W. Robertson ; Rachel A. Oliver ; Sunil Bhardwaj ; Cinzia Cepek ; John Robertson
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16819-16827
• 全文大小：619K
• ISSN：1944-8252

文摘

We grow dense carbon nanotube forests at 450 掳C on Cu support using Co/Al/Mo multilayer catalyst. As a partial barrier layer for the diffusion of Co into Mo, we apply very thin Al layer with the nominal thickness of 0.50 nm between Co and Mo. This Al layer plays an important role in the growth of dense CNT forests, partially preventing the Co鈥揗o interaction. The forests have an average height of 鈭?00 nm and a mass density of 1.2 g cm^鈥? with tubes exhibiting extremely narrow inner spacing. An ohmic behavior is confirmed between the forest and Cu support with the lowest resistance of 鈭? k惟. The forest shows a high thermal effusivity of 1840 J s^鈥?.5 m^鈥? K^鈥?, and a thermal conductivity of 4.0 J s^鈥? m^鈥? K^鈥?, suggesting that these forests are useful for heat dissipation devices.