Effect of hydrogen pretreatment on the spin-capability of a multiwalled carbon nanotube forest

The authors report the effect of hydrogen (H2) pretreatment on the spin capability of vertically aligned multiwalled carbon nanotubes (MWCNTs) grown on an iron (Fe) catalyst by using a chemical vapor deposition system. Variations in H2 pretreatment time had significant effects on the distribution, m...

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Bibliographic Details
Published in:Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 2013-11, Vol.31 (6), p.6
Main Authors: Jung, Daewoong, Han, Maeum, Overzet, Lawrence J., Lee, Gil S.
Format: Article
Language:English
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Summary:The authors report the effect of hydrogen (H2) pretreatment on the spin capability of vertically aligned multiwalled carbon nanotubes (MWCNTs) grown on an iron (Fe) catalyst by using a chemical vapor deposition system. Variations in H2 pretreatment time had significant effects on the distribution, morphology, diameter, and height of MWCNTs. A longer H2 pretreatment time to the Fe film increased the number of large Fe particles as well as crystallization of Fe3O4 phase. As a result, the areal density of carbon nanotubes (CNTs) was largely reduced, whereas the mean CNT diameter slightly increased. This worsened the alignment of the CNTs and reduced the spin-capability of MWCNTs.
ISSN:2166-2746
1520-8567
2166-2754
DOI:10.1116/1.4825116