Scaled-up self-assembly of carbon nanotubes inside long stainless steel tubing

Document Type

Article

Publication Date

6-1-2006

Abstract

The self-assembly of carbon nanotubes (CNTs) on the inside wall of a relatively long stainless steel tubing for applications such as separations and chromatography, is reported in this paper. The CNTs were deposited by the chemical vapor deposition (CVD) using ethylene as the carbon source and the iron nanostructures in the stainless steel as the catalyst. The coating consisted of a layer of CNTs aligned perpendicular to the circumference of the tubes, often with an overcoat of disordered carbonaceous material, which could be selectively oxidized by exposing the CNT layer below to pure O2 at 375 °C. Variation in uniformity in terms of the thickness and morphology of the deposited film and surface coverage were studied along the length of a tube by scanning electron microscopy (SEM). The effects of process conditions, such as flow rate and deposition time on the coating thickness, were studied. The catalytic effect of the iron nanostructures depended on surface conditioning of the tubing. It was found that the pretreatment temperature influenced the quality of the nanotube coating. The morphology of the CNT deposit supported the base-growth scheme and VLS (vapor-liquid-solid) growth mechanisms of CNTs. © 2005 Elsevier Ltd. All rights reserved.

Identifier

33644914177 (Scopus)

Publication Title

Carbon

External Full Text Location

https://doi.org/10.1016/j.carbon.2005.10.046

ISSN

00086223

First Page

1235

Last Page

1242

Issue

7

Volume

44

Fund Ref

U.S. Environmental Protection Agency

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