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dc.contributor.author
Herrera, Jose E.
dc.contributor.author
Balzano, Leandro
dc.contributor.author
Pompeo, Francisco
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dc.contributor.author
Resasco, Daniel E.
dc.date.available
2018-11-05T18:58:20Z
dc.date.issued
2003-02-01
dc.identifier.citation
Herrera, Jose E.; Balzano, Leandro; Pompeo, Francisco; Resasco, Daniel E.; Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO; American Scientific Publishers; Journal of Nanoscience and Nanotechnology; 3; 1-2; 1-2-2003; 133-138
dc.identifier.issn
1533-4880
dc.identifier.uri
http://hdl.handle.net/11336/63651
dc.description.abstract
Single-walled carbon nanotubes prepared by disproportionation of CO over Co-Mo/SiO 2 catalysts have been characterized by Raman spectroscopy, using several excitation energies. By varying the reaction temperature, different ranges of nanotube diameter were obtained. The average diameter of a single-walled nanotube produced at 750°C was 0.9 nm, while it increased up to about 1.5 nm when the synthesis was conducted at 950°C. The analysis of the Raman spectra obtained with a range of laser excitation energies not only gives a definite description of the single-walled nanotubes diameters but also helps differentiate the metallic or semiconducting character of the samples. This analysis can be done by comparing the experimental data with calculated gap energies as a function of nanotube diameter as well as comparing the relative intensity of bands centered at 50-60 cm -1 lower than the tangential G mode. The analysis of this feature, which can be fitted with a Breit-Wigner-Fano line, offers a method for distinguishing between metallic and semiconducting single-walled carbon nanotubes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Scientific Publishers
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cobalt Molybdenum Catalyst
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Metal Nanoparticles
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Raman Spectroscopy
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Single Wall Nanotube Diameter
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Single Wall Nanotube Growth
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Single Wall Nanotube Production
dc.subject.classification
Otras Ingeniería Química
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dc.subject.classification
Ingeniería Química
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-12T18:06:15Z
dc.identifier.eissn
1533-4899
dc.journal.volume
3
dc.journal.number
1-2
dc.journal.pagination
133-138
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
California
dc.description.fil
Fil: Herrera, Jose E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
dc.description.fil
Fil: Balzano, Leandro. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
dc.description.fil
Fil: Pompeo, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.description.fil
Fil: Resasco, Daniel E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
dc.journal.title
Journal of Nanoscience and Nanotechnology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1166/jnn.2003.153
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/asp/jnn/2003/00000003/F0020001/art00017
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