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Effect of Catalytic Layer Thickness on Diameter of Vertically Aligned Individual Carbon Nanotubes
Joint Authors
Jung, Hyun Kyung
Lee, Hyung Woo
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-10
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The effect of catalytic thin film thickness on the diameter control of individual carbon nanotubes grown by plasma enhanced chemical vapor deposition was investigated.
Individual carbon nanotubes were grown on catalytic nanodot arrays, which were fabricated by e-beam lithography and e-beam evaporation.
During e-beam evaporation of the nanodot pattern, more catalytic metal was deposited at the edge of the nanodots than the desired catalyst thickness.
Because of this phenomenon, carbon atoms diffused faster near the center of the dots than at the edge of the dots.
The carbon atoms, which were gathered at the interface between the catalytic nanodot and the diffusion barrier, accumulated near the center of the dot and lifted the catalyst off.
From the experiments, an individual carbon nanotube with the same diameter as that of the catalytic nanodot was obtained from a 5 nm thick catalytic nanodot; however, an individual carbon nanotube with a smaller diameter (~40% reduction) was obtained from a 50 nm thick nanodot.
We found that the thicker the catalytic layer, the greater the reduction in diameter of the carbon nanotubes.
The diameter-controlled carbon nanotubes could have applications in bio- and nanomaterial scanning and as a contrast medium for magnetic resonance imaging.
American Psychological Association (APA)
Jung, Hyun Kyung& Lee, Hyung Woo. 2014. Effect of Catalytic Layer Thickness on Diameter of Vertically Aligned Individual Carbon Nanotubes. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-6.
https://search.emarefa.net/detail/BIM-1041364
Modern Language Association (MLA)
Jung, Hyun Kyung& Lee, Hyung Woo. Effect of Catalytic Layer Thickness on Diameter of Vertically Aligned Individual Carbon Nanotubes. Journal of Nanomaterials No. 2014 (2014), pp.1-6.
https://search.emarefa.net/detail/BIM-1041364
American Medical Association (AMA)
Jung, Hyun Kyung& Lee, Hyung Woo. Effect of Catalytic Layer Thickness on Diameter of Vertically Aligned Individual Carbon Nanotubes. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-6.
https://search.emarefa.net/detail/BIM-1041364
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041364