超长碳纳米管束的空气辅助生长。

Air-assisted growth of ultra-long carbon nanotube bundles.

作者信息

Li Xuesong, Zhang Xianfeng, Ci Lijie, Shah Rakesh, Wolfe Christopher, Kar Swastik, Talapatra Saikat, Ajayan Pulickel M

机构信息

Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

出版信息

Nanotechnology. 2008 Nov 12;19(45):455609. doi: 10.1088/0957-4484/19/45/455609. Epub 2008 Oct 9.

DOI:10.1088/0957-4484/19/45/455609

PMID:21832786

Abstract

We report an air-assisted chemical vapor deposition (CVD) method for the synthesis of super-long carbon nanotube (CNT) bundles. By mixing a small amount of air in the vapor phase catalyst CVD process, the catalyst lifetime can be dramatically increased, and extremely long dense and aligned CNT bundles up to 1.5 cm can be achieved. Electron microscopy characterization shows that the injection of air does not damage the CNT structures. Further, we have estimated that individual ultra-long CNTs can carry moderate current densities ∼10(5) A cm(-2), indicating their possible use in nanoelectronic devices.

摘要

我们报道了一种用于合成超长碳纳米管束的空气辅助化学气相沉积（CVD）方法。通过在气相催化剂CVD过程中混入少量空气，催化剂寿命可显著延长，并且能够制备出长达1.5厘米的极长、致密且排列整齐的碳纳米管束。电子显微镜表征显示，注入空气不会破坏碳纳米管结构。此外，我们估计单个超长碳纳米管能够承载约10⁵ A cm⁻²的中等电流密度，这表明它们在纳米电子器件中具有潜在应用价值。