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Abstract:

The effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation of carbon nanotubes (CNTs) films on the chemical and electronic properties of the material is reported. The CNTs were grown by the chemical vapor deposition technique (CVD) on silicon TiN coated substrates previously decorated with Ni particles. The Ni decoration and TiN coating were successively deposited by ion-beam assisted deposition (IBAD) and afterwards the nanotubes were grown. The whole deposition procedure was performed in situ as well as the study of the effect of ion-beam irradiation on the CNTs by x-ray photoelectron spectroscopy (XPS). Raman scattering, field-effect emission gun scanning electron microscopy (FEG-SEM), and field emission (FE) measurements were performed ex situ. The experimental data show that: (a) the presence of either H2+ or N2 + ions in the irradiation beam determines the oxygen concentration remaining in the samples as well as the studied structural characteristics; (b) due to the experimental conditions used in the study, no morphological changes have been observed after irradiation of the CNTs; (c) the FE experiments indicate that the electron emission from the CNTs follows the Fowler-Nordheim model, and it is dependent on the oxygen concentration remaining in the samples; and (d) in association with FE results, the XPS data suggest that the formation of terminal quinone groups decreases the CNTs work function of the material. © 2011 American Institute of Physics.

Registro:

Documento: Artículo
Título:Effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation on the field emission properties of carbon nanotubes
Autor:Acua, J.J.S.; Escobar, M.; Goyanes, S.N.; Candal, R.J.; Zanatta, A.R.; Alvarez, F.
Filiación:Instituto de Fsica Gleb Wataghin, UNICAMP, P.O. Box 6165, Campinas, SP, 13083-970, Brazil
INQUIMAE, FCEyN-UBA-CONICET, Ciudad Universitaria, Pabelln II, Buenos Aires, Argentina
Depto. Fsica, FECyN, Ciudad Universitaria, Pabelln II, Buenos Aires, Argentina
ECyT, UNSAM, Campus Migueletes, San Martn, Pcia. Buenos Aires, Argentina
Instituto de Fsica de so Carlos-USP, P.O. Box 369, São Carlos 13560-250, Brazil
Palabras clave:Chemical vapor; Coated substrates; Ex situ; Experimental conditions; Experimental data; FEG-SEM; Field emission measurements; Field emission property; Field-effect; Fowler-Nordheim; In-situ; Ion beam irradiation; Morphological changes; NI particles; Oxygen concentrations; Quinone groups; Structural characteristics; TiN coating; XPS data; Carbon nanotubes; Chemical vapor deposition; Electron emission; Electronic properties; Field emission; Ion beams; Ions; Oxygen; Photoelectron spectroscopy; Scanning electron microscopy; Titanium nitride; X ray photoelectron spectroscopy; Irradiation
Año:2011
Volumen:109
Número:11
DOI: http://dx.doi.org/10.1063/1.3593269
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00218979_v109_n11_p_Acua.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v109_n11_p_Acua

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Citas:

---------- APA ----------
Acua, J.J.S., Escobar, M., Goyanes, S.N., Candal, R.J., Zanatta, A.R. & Alvarez, F. (2011) . Effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation on the field emission properties of carbon nanotubes. Journal of Applied Physics, 109(11).
http://dx.doi.org/10.1063/1.3593269
---------- CHICAGO ----------
Acua, J.J.S., Escobar, M., Goyanes, S.N., Candal, R.J., Zanatta, A.R., Alvarez, F. "Effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation on the field emission properties of carbon nanotubes" . Journal of Applied Physics 109, no. 11 (2011).
http://dx.doi.org/10.1063/1.3593269
---------- MLA ----------
Acua, J.J.S., Escobar, M., Goyanes, S.N., Candal, R.J., Zanatta, A.R., Alvarez, F. "Effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation on the field emission properties of carbon nanotubes" . Journal of Applied Physics, vol. 109, no. 11, 2011.
http://dx.doi.org/10.1063/1.3593269
---------- VANCOUVER ----------
Acua, J.J.S., Escobar, M., Goyanes, S.N., Candal, R.J., Zanatta, A.R., Alvarez, F. Effect of O2+, H2+ O 2+, and N2+ O2 + ion-beam irradiation on the field emission properties of carbon nanotubes. J Appl Phys. 2011;109(11).
http://dx.doi.org/10.1063/1.3593269