Controlling the work function of a diamond-like carbon surface by fluorination with XeF2

Autores
Tarditi, Ana Maria; Kondratyuk, Petro; Wong, Pak Kin; Gellman, Andrew J.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Thin diamond-like carbon films were subjected to fluorination with gaseous XeF2 under ultrahigh vacuum conditions in order to increase the work function of the diamond-like carbon surface. Changes in the work function and surface composition were monitored with UV photoemission spectroscopy (UPS) and x-ray photoemission spectroscopy (XPS), respectively. Successive XeF2 exposures raised the work function by as much as 1.55 eV. Surprisingly, approximately half of the increase in the work function occurred while the coverage of fluorine remained below 0.02 monolayers (ML). This suggests that initial doses of XeF2 remove extrinsic adsorbates from the diamond-like carbon film and that fluorine desorbs with the reaction products. Increasing the exposure of the diamond-like carbon to XeF2 leads to the expected covalent fluorination of the surface, which saturates at fluorine coverages of 6 F atoms/nm2 (~0.3 ML). Annealing of the diamond-like carbon to temperatures above 850 K was required to reduce the surface fluorine concentration to undetectable levels. This did not, however, cause the work function to return to its original, pre-fluorination value.
Fil: Tarditi, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Kondratyuk, Petro. University of Carnegie Mellon; Estados Unidos
Fil: Wong, Pak Kin. Sae Technology Centre; China
Fil: Gellman, Andrew J.. University of Carnegie Mellon; Estados Unidos. Institute For Advanced Energy Studies;
Materia
diamond-like carbon
XeF2
work function
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:11336/54029

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spelling Controlling the work function of a diamond-like carbon surface by fluorination with XeF2Tarditi, Ana MariaKondratyuk, PetroWong, Pak KinGellman, Andrew J.diamond-like carbonXeF2work functionhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Thin diamond-like carbon films were subjected to fluorination with gaseous XeF2 under ultrahigh vacuum conditions in order to increase the work function of the diamond-like carbon surface. Changes in the work function and surface composition were monitored with UV photoemission spectroscopy (UPS) and x-ray photoemission spectroscopy (XPS), respectively. Successive XeF2 exposures raised the work function by as much as 1.55 eV. Surprisingly, approximately half of the increase in the work function occurred while the coverage of fluorine remained below 0.02 monolayers (ML). This suggests that initial doses of XeF2 remove extrinsic adsorbates from the diamond-like carbon film and that fluorine desorbs with the reaction products. Increasing the exposure of the diamond-like carbon to XeF2 leads to the expected covalent fluorination of the surface, which saturates at fluorine coverages of 6 F atoms/nm2 (~0.3 ML). Annealing of the diamond-like carbon to temperatures above 850 K was required to reduce the surface fluorine concentration to undetectable levels. This did not, however, cause the work function to return to its original, pre-fluorination value.Fil: Tarditi, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Kondratyuk, Petro. University of Carnegie Mellon; Estados UnidosFil: Wong, Pak Kin. Sae Technology Centre; ChinaFil: Gellman, Andrew J.. University of Carnegie Mellon; Estados Unidos. Institute For Advanced Energy Studies;A V S Amer Inst Physics2010-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54029Tarditi, Ana Maria; Kondratyuk, Petro; Wong, Pak Kin; Gellman, Andrew J.; Controlling the work function of a diamond-like carbon surface by fluorination with XeF2; A V S Amer Inst Physics; Journal Of Vacuum Science & Technology A - Vacuum Surfaces And Films; 28; 7-2010; 1250-12540734-2101CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1116/1.3480335info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:37:34Zoai:ri.conicet.gov.ar:11336/54029instacron: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:34982025-09-29 10:37:34.986CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
title Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
spellingShingle Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
Tarditi, Ana Maria
diamond-like carbon
XeF2
work function
title_short Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
title_full Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
title_fullStr Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
title_full_unstemmed Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
title_sort Controlling the work function of a diamond-like carbon surface by fluorination with XeF2
dc.creator.none.fl_str_mv Tarditi, Ana Maria
Kondratyuk, Petro
Wong, Pak Kin
Gellman, Andrew J.
author Tarditi, Ana Maria
author_facet Tarditi, Ana Maria
Kondratyuk, Petro
Wong, Pak Kin
Gellman, Andrew J.
author_role author
author2 Kondratyuk, Petro
Wong, Pak Kin
Gellman, Andrew J.
author2_role author
author
author
dc.subject.none.fl_str_mv diamond-like carbon
XeF2
work function
topic diamond-like carbon
XeF2
work function
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Thin diamond-like carbon films were subjected to fluorination with gaseous XeF2 under ultrahigh vacuum conditions in order to increase the work function of the diamond-like carbon surface. Changes in the work function and surface composition were monitored with UV photoemission spectroscopy (UPS) and x-ray photoemission spectroscopy (XPS), respectively. Successive XeF2 exposures raised the work function by as much as 1.55 eV. Surprisingly, approximately half of the increase in the work function occurred while the coverage of fluorine remained below 0.02 monolayers (ML). This suggests that initial doses of XeF2 remove extrinsic adsorbates from the diamond-like carbon film and that fluorine desorbs with the reaction products. Increasing the exposure of the diamond-like carbon to XeF2 leads to the expected covalent fluorination of the surface, which saturates at fluorine coverages of 6 F atoms/nm2 (~0.3 ML). Annealing of the diamond-like carbon to temperatures above 850 K was required to reduce the surface fluorine concentration to undetectable levels. This did not, however, cause the work function to return to its original, pre-fluorination value.
Fil: Tarditi, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Kondratyuk, Petro. University of Carnegie Mellon; Estados Unidos
Fil: Wong, Pak Kin. Sae Technology Centre; China
Fil: Gellman, Andrew J.. University of Carnegie Mellon; Estados Unidos. Institute For Advanced Energy Studies;
description Thin diamond-like carbon films were subjected to fluorination with gaseous XeF2 under ultrahigh vacuum conditions in order to increase the work function of the diamond-like carbon surface. Changes in the work function and surface composition were monitored with UV photoemission spectroscopy (UPS) and x-ray photoemission spectroscopy (XPS), respectively. Successive XeF2 exposures raised the work function by as much as 1.55 eV. Surprisingly, approximately half of the increase in the work function occurred while the coverage of fluorine remained below 0.02 monolayers (ML). This suggests that initial doses of XeF2 remove extrinsic adsorbates from the diamond-like carbon film and that fluorine desorbs with the reaction products. Increasing the exposure of the diamond-like carbon to XeF2 leads to the expected covalent fluorination of the surface, which saturates at fluorine coverages of 6 F atoms/nm2 (~0.3 ML). Annealing of the diamond-like carbon to temperatures above 850 K was required to reduce the surface fluorine concentration to undetectable levels. This did not, however, cause the work function to return to its original, pre-fluorination value.
publishDate 2010
dc.date.none.fl_str_mv 2010-07
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/11336/54029
Tarditi, Ana Maria; Kondratyuk, Petro; Wong, Pak Kin; Gellman, Andrew J.; Controlling the work function of a diamond-like carbon surface by fluorination with XeF2; A V S Amer Inst Physics; Journal Of Vacuum Science & Technology A - Vacuum Surfaces And Films; 28; 7-2010; 1250-1254
0734-2101
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54029
identifier_str_mv Tarditi, Ana Maria; Kondratyuk, Petro; Wong, Pak Kin; Gellman, Andrew J.; Controlling the work function of a diamond-like carbon surface by fluorination with XeF2; A V S Amer Inst Physics; Journal Of Vacuum Science & Technology A - Vacuum Surfaces And Films; 28; 7-2010; 1250-1254
0734-2101
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1116/1.3480335
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 A V S Amer Inst Physics
publisher.none.fl_str_mv A V S Amer Inst Physics
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
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