Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO

Autores
Herrera, Jose E.; Balzano, Leandro; Pompeo, Francisco; Resasco, Daniel E.
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Herrera, Jose E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
Fil: Balzano, Leandro. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
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
Fil: Resasco, Daniel E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
Materia
Cobalt Molybdenum Catalyst
Metal Nanoparticles
Raman Spectroscopy
Single Wall Nanotube Diameter
Single Wall Nanotube Growth
Single Wall Nanotube Production
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63651
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/63651
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of COHerrera, Jose E.Balzano, LeandroPompeo, FranciscoResasco, Daniel E.Cobalt Molybdenum CatalystMetal NanoparticlesRaman SpectroscopySingle Wall Nanotube DiameterSingle Wall Nanotube GrowthSingle Wall Nanotube Productionhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Single-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.Fil: Herrera, Jose E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados UnidosFil: Balzano, Leandro. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados UnidosFil: 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; ArgentinaFil: Resasco, Daniel E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados UnidosAmerican Scientific Publishers2003-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63651Herrera, 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; 133-1381533-48801533-4899CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1166/jnn.2003.153info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/asp/jnn/2003/00000003/F0020001/art00017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:15Zoai:ri.conicet.gov.ar:11336/63651instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:08:15.476CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
title Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
spellingShingle Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
Herrera, Jose E.
Cobalt Molybdenum Catalyst
Metal Nanoparticles
Raman Spectroscopy
Single Wall Nanotube Diameter
Single Wall Nanotube Growth
Single Wall Nanotube Production
title_short Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
title_full Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
title_fullStr Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
title_full_unstemmed Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
title_sort Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO
dc.creator.none.fl_str_mv Herrera, Jose E.
Balzano, Leandro
Pompeo, Francisco
Resasco, Daniel E.
author Herrera, Jose E.
author_facet Herrera, Jose E.
Balzano, Leandro
Pompeo, Francisco
Resasco, Daniel E.
author_role author
author2 Balzano, Leandro
Pompeo, Francisco
Resasco, Daniel E.
author2_role author
author
author
dc.subject.none.fl_str_mv Cobalt Molybdenum Catalyst
Metal Nanoparticles
Raman Spectroscopy
Single Wall Nanotube Diameter
Single Wall Nanotube Growth
Single Wall Nanotube Production
topic Cobalt Molybdenum Catalyst
Metal Nanoparticles
Raman Spectroscopy
Single Wall Nanotube Diameter
Single Wall Nanotube Growth
Single Wall Nanotube Production
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv 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.
Fil: Herrera, Jose E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
Fil: Balzano, Leandro. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
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
Fil: Resasco, Daniel E.. University of Oklahoma. School of Chemical Engineering and Materials Science; Estados Unidos
description 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.
publishDate 2003
dc.date.none.fl_str_mv 2003-02-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/63651
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
1533-4880
1533-4899
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63651
identifier_str_mv 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
1533-4880
1533-4899
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1166/jnn.2003.153
info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/asp/jnn/2003/00000003/F0020001/art00017
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Scientific Publishers
publisher.none.fl_str_mv American Scientific Publishers
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842270037509931008
score 13.13397

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