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Title: Re-grown aligned carbon nanotubes with improved field emission
Authors: Lim, X. 
Zhu, Y. 
Varghese, B. 
Gao, X. 
Wee, A.T.S. 
Sow, C.-H. 
Keywords: Carbon nanotubes
Field emission
Surface characterization
Surface structures
Issue Date: 2012
Citation: Lim, X., Zhu, Y., Varghese, B., Gao, X., Wee, A.T.S., Sow, C.-H. (2012). Re-grown aligned carbon nanotubes with improved field emission. Journal of Nanoscience and Nanotechnology 12 (1) : 258-266. ScholarBank@NUS Repository.
Abstract: In this work, a simple technique to improve the field emission property of multi-walled carbon nanotubes is presented. Re-grown multi-walled carbon nanotubes are grown on the same substrates after the as-grown multi-walled carbon nanotubes are transferred to other substrates using polydimethylsiloxane as intermediation. For the duration of the synthesis of the re-grown multi-walled carbon nanotubes, similar synthesis parameters used in growing the as-grown multi-walled carbon nanotubes are utilized. As a form of possible application, field emission studies show ∼2.6 times improvement in field enhancement factor and more uniform emission for the re-grown multi-walled carbon nanotubes. In addition, the turn-on field is reduced from 2.85 V/μm to 1.40 V/μm. Such significant improvements are attributed to new emission sites comprising of sharp carbonaceous impurities encompassing both tip and upper portion of the multi-walled carbon nanotubes. As such, this technique presents a viable route for the production of multi-walled carbon nanotubes with better field emission quality. Copyright © 2012 American Scientific Publishers All rights reserved.
Source Title: Journal of Nanoscience and Nanotechnology
ISSN: 15334880
DOI: 10.1166/jnn.2012.5146
Appears in Collections:Staff Publications

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