Low energy ion scattering in He/HOPG system

Autores
Bajales Luna, Noelia; Bonetto, Fernando Jose; Vidal, Ricardo Alberto; Goldberg, Edith Catalina; Ferron, Julio
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Low energy ion scattering (LEIS) is a unique tool in surface analysis, since it provides the atomic composition of the outer atomic layer, and time of flight ion scattering (TOF) is a non-destructive method of analysis that is sensitive to all elements. The outer surface atoms dominate many processes such as adhesion, electron emission, growth, wetting and overall catalysis. In catalysis, LEIS applications include understanding and improvement of catalytic phenomena, site of poisoning, size of nanoclusters and quantification of promoters. In this work, we study the neutralization of low energy He+ ions on graphite (highly oriented pyrolytic graphite, HOPG) verifying that the ion fraction is close to null, i.e., a large neutralization probability. Resonant neutralization to the ground state (RN) has been the main mechanism expected for He+ scattered by HOPG, but we found that only by including the resonant neutralization to the first excited state (1s, 2s), the small ion fractions measured can be explained. © 2007 Elsevier B.V. All rights reserved.
Fil: Bajales Luna, Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Vidal, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Ferron, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Materia
Catalysis
Hopg
Leis
Resonant Neutralization
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:11336/54046
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/54046
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Low energy ion scattering in He/HOPG systemBajales Luna, NoeliaBonetto, Fernando JoseVidal, Ricardo AlbertoGoldberg, Edith CatalinaFerron, JulioCatalysisHopgLeisResonant Neutralizationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Low energy ion scattering (LEIS) is a unique tool in surface analysis, since it provides the atomic composition of the outer atomic layer, and time of flight ion scattering (TOF) is a non-destructive method of analysis that is sensitive to all elements. The outer surface atoms dominate many processes such as adhesion, electron emission, growth, wetting and overall catalysis. In catalysis, LEIS applications include understanding and improvement of catalytic phenomena, site of poisoning, size of nanoclusters and quantification of promoters. In this work, we study the neutralization of low energy He+ ions on graphite (highly oriented pyrolytic graphite, HOPG) verifying that the ion fraction is close to null, i.e., a large neutralization probability. Resonant neutralization to the ground state (RN) has been the main mechanism expected for He+ scattered by HOPG, but we found that only by including the resonant neutralization to the first excited state (1s, 2s), the small ion fractions measured can be explained. © 2007 Elsevier B.V. All rights reserved.Fil: Bajales Luna, Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Vidal, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Ferron, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaElsevier Science2008-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54046Bajales Luna, Noelia; Bonetto, Fernando Jose; Vidal, Ricardo Alberto; Goldberg, Edith Catalina; Ferron, Julio; Low energy ion scattering in He/HOPG system; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 2-2008; 237-2401381-1169CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.molcata.2007.10.025info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1381116907006073info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:00:08Zoai:ri.conicet.gov.ar:11336/54046instacron: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 10:00:09.148CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Low energy ion scattering in He/HOPG system
title Low energy ion scattering in He/HOPG system
spellingShingle Low energy ion scattering in He/HOPG system
Bajales Luna, Noelia
Catalysis
Hopg
Leis
Resonant Neutralization
title_short Low energy ion scattering in He/HOPG system
title_full Low energy ion scattering in He/HOPG system
title_fullStr Low energy ion scattering in He/HOPG system
title_full_unstemmed Low energy ion scattering in He/HOPG system
title_sort Low energy ion scattering in He/HOPG system
dc.creator.none.fl_str_mv Bajales Luna, Noelia
Bonetto, Fernando Jose
Vidal, Ricardo Alberto
Goldberg, Edith Catalina
Ferron, Julio
author Bajales Luna, Noelia
author_facet Bajales Luna, Noelia
Bonetto, Fernando Jose
Vidal, Ricardo Alberto
Goldberg, Edith Catalina
Ferron, Julio
author_role author
author2 Bonetto, Fernando Jose
Vidal, Ricardo Alberto
Goldberg, Edith Catalina
Ferron, Julio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Catalysis
Hopg
Leis
Resonant Neutralization
topic Catalysis
Hopg
Leis
Resonant Neutralization
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Low energy ion scattering (LEIS) is a unique tool in surface analysis, since it provides the atomic composition of the outer atomic layer, and time of flight ion scattering (TOF) is a non-destructive method of analysis that is sensitive to all elements. The outer surface atoms dominate many processes such as adhesion, electron emission, growth, wetting and overall catalysis. In catalysis, LEIS applications include understanding and improvement of catalytic phenomena, site of poisoning, size of nanoclusters and quantification of promoters. In this work, we study the neutralization of low energy He+ ions on graphite (highly oriented pyrolytic graphite, HOPG) verifying that the ion fraction is close to null, i.e., a large neutralization probability. Resonant neutralization to the ground state (RN) has been the main mechanism expected for He+ scattered by HOPG, but we found that only by including the resonant neutralization to the first excited state (1s, 2s), the small ion fractions measured can be explained. © 2007 Elsevier B.V. All rights reserved.
Fil: Bajales Luna, Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Vidal, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Ferron, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
description Low energy ion scattering (LEIS) is a unique tool in surface analysis, since it provides the atomic composition of the outer atomic layer, and time of flight ion scattering (TOF) is a non-destructive method of analysis that is sensitive to all elements. The outer surface atoms dominate many processes such as adhesion, electron emission, growth, wetting and overall catalysis. In catalysis, LEIS applications include understanding and improvement of catalytic phenomena, site of poisoning, size of nanoclusters and quantification of promoters. In this work, we study the neutralization of low energy He+ ions on graphite (highly oriented pyrolytic graphite, HOPG) verifying that the ion fraction is close to null, i.e., a large neutralization probability. Resonant neutralization to the ground state (RN) has been the main mechanism expected for He+ scattered by HOPG, but we found that only by including the resonant neutralization to the first excited state (1s, 2s), the small ion fractions measured can be explained. © 2007 Elsevier B.V. All rights reserved.
publishDate 2008
dc.date.none.fl_str_mv 2008-02
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/11336/54046
Bajales Luna, Noelia; Bonetto, Fernando Jose; Vidal, Ricardo Alberto; Goldberg, Edith Catalina; Ferron, Julio; Low energy ion scattering in He/HOPG system; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 2-2008; 237-240
1381-1169
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54046
identifier_str_mv Bajales Luna, Noelia; Bonetto, Fernando Jose; Vidal, Ricardo Alberto; Goldberg, Edith Catalina; Ferron, Julio; Low energy ion scattering in He/HOPG system; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 2-2008; 237-240
1381-1169
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.molcata.2007.10.025
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1381116907006073
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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_ 1842269622378692608
score 13.13397

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