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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Field emission properties of the graphenated carbon nanotube electrode

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Author(s):
Zanin, H. [1] ; Ceragioli, H. J. [2] ; Peterlevitz, A. C. [2] ; Baranauskas, Vitor [2] ; Marciano, F. R. [3] ; Lobo, A. O. [3]
Total Authors: 6
Affiliation:
[1] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon - England
[2] Univ Estadual Campinas, Fac Elect & Comp Engn, Dept Semicond Instrumentos & Foton, BR-13083852 Campinas, SP - Brazil
[3] UNIVAP, Inst Res & Dev, Lab Biomed Nanotechnol, BR-12244000 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Applied Surface Science; v. 324, p. 174-178, JAN 1 2015.
Web of Science Citations: 6
Abstract

Reduced graphene oxide-coated carbon nanotubes (RGO-CNT) electrodes have been prepared by hot filament chemical vapour deposition system in one-step growth process. We studied RGO-CNT electrodes behaviour as cold cathode in field emission test. Our results show that RGO-CNT retain the low threshold voltage typical of CNTs, but with greatly improved emission current stability. The field emission enhancement value is significantly higher than that expected being caused by geometric effect (height divided by the radius of nanotube). This suggested that the field emission of this hybrid structure is not only from a single tip, but eventually it is from several tips with contribution of graphene nanosheets at CNT's walls. This phenomenon explains why the graphenated carbon nanotubes do not burn out as quickly as CNT does until emission ceases completely. These preliminaries results make nanocarbon materials good candidates for applications as electron sources for several devices. (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/20345-7 - Study of nanoparticle-incorporated diamond-like carbon films for biomedical applications
Grantee:Fernanda Roberta Marciano
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 14/02163-7 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
Grantee:Hudson Giovani Zanin
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 11/17877-7 - Development of new polymeric scaffolds by electrospinning technique with incorporation of vertically aligned carbon nanotubes and nanohidroxyapatite for bone tissue regeneration
Grantee:Anderson de Oliveira Lobo
Support Opportunities: Research Grants - Young Investigators Grants