Growth and surface engineering of vertically-aligned low-wall-number carbon nanotubes

A novel catalyst of cobalt supported by single crystal MgO was prepared by atomic layer deposition and used for carbon nanotube growth. With CO as carbon source, vertically-aligned carbon nanotubes with predominant double-walled (82%) were produced at 700°C. Similar carbon nanotube array with a majo...

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Bibliographic Details
Published in:Carbon (New York) 2012-10, Vol.50 (12), p.4750-4754
Main Authors: He, Maoshuai, Vasala, Sami, Jiang, Hua, Karppinen, Maarit, Kauppinen, Esko I., Niemelä, Marita, Lehtonen, Juha
Format: Article
Language:English
Subjects:
Acetone
Arrays
Carbon
Carbon nanotubes
Deposition
Flexibility
Magnesium oxide
Methane
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Summary:A novel catalyst of cobalt supported by single crystal MgO was prepared by atomic layer deposition and used for carbon nanotube growth. With CO as carbon source, vertically-aligned carbon nanotubes with predominant double-walled (82%) were produced at 700°C. Similar carbon nanotube array with a majority of single-walled tubes (62%) was produced at 900°C using methane as the carbon source. Due to their high flexibility compared with multi-walled carbon nanotubes, the low-wall-number carbon nanotube array could form a 3-dimensional honeycomb-like network when being spread with acetone.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.05.028