Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.diamond.2011.10.006
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dc.titleEnhanced electron emission from tetrahedral amorphous carbon capped carbon nanotube core-shelled structure
dc.contributor.authorYu, J.
dc.contributor.authorAnetab, P.
dc.contributor.authorKoh, A.T.T.
dc.contributor.authorChua, D.H.C.
dc.contributor.authorWei, J.
dc.date.accessioned2014-10-07T09:49:05Z
dc.date.available2014-10-07T09:49:05Z
dc.date.issued2012-01
dc.identifier.citationYu, J., Anetab, P., Koh, A.T.T., Chua, D.H.C., Wei, J. (2012-01). Enhanced electron emission from tetrahedral amorphous carbon capped carbon nanotube core-shelled structure. Diamond and Related Materials 21 : 37-41. ScholarBank@NUS Repository. https://doi.org/10.1016/j.diamond.2011.10.006
dc.identifier.issn09259635
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/86301
dc.description.abstractCore-shelled composites have been shown to enhance material properties, notably for chemical sensing and biomolecular applications. In this comprehensive study, we show that a simple core-shell structure, made up of tetrahedral amorphous carbon (ta-C) tip-capped onto an aligned dense array of carbon nanotubes (CNT), exhibits superior electron emission properties, having a distinct enhancement in the turn-on field of < 1 V/μm without any lithography patterning. This is compared to ~ 2 V/μm for pristine CNT samples. A KrF pulsed laser deposition process was used to deposit high (> 70%) sp 3 content non-hydrogenated ta-C films of varying thickness for the tip-capping process. Combining scanning electron microscopy images and electron emission testing results, our systematic study shows that first, the thickness of the ta-C can range from 20 to 100 nm and is sufficient to achieve the enhancement effect. However, thicker coatings > 200 nm will degrade the electron emission. Second, a simple tip-capping is sufficient to achieve the enhancement without the need to encapsulate the entire carbon nanotube. © 2011 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.diamond.2011.10.006
dc.sourceScopus
dc.subjectCarbon nanotubes
dc.subjectCore-shell
dc.subjectElectron emission
dc.subjectThickness
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.description.doi10.1016/j.diamond.2011.10.006
dc.description.sourcetitleDiamond and Related Materials
dc.description.volume21
dc.description.page37-41
dc.description.codenDRMTE
dc.identifier.isiut000300276900008
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