In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper
- Autores
- Adams, Heather; Miller, Brendan P.; Kotvis, Peter V.; Furlong, Octavio Javier; Martini, Ashlie; Tysoe, Wilfred T.
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The reaction pathways and shear-induced kinetics of methyl thiolate and ethyl thiolate species on copper are measured using in situ and ex situ techniques in ultrahigh vacuum. The in situ techniques consist of measuring the gas-phase products using a mass spectrometer placed in-line-of-sight of the rubbing interface while monitoring the variation in friction coefficient of an alkyl thiolate-covered surface as a function of the number of times it is rubbed (referred to in the paper as "number of scans"). The rubbed surfaces are analyzed using Auger spectroscopy as a function of the number of scans. The experiments are carried out for a tungsten carbide ball covered by a copper transfer film on copper surface at a normal load of 0.44 N and a sliding speed of 4 mm/s. The shear-induced reaction occurs as RS(ads) → S(ads) → S(subsurface), where RS(ads) is an adsorbed alkyl thiolate species, S(ads) is adsorbed atomic sulfur, and S(subsurface) is subsurface sulfur formed by shear-induced surface-to-bulk transport. The rate constants for the sequential reaction steps are found by fitting an analytical kinetic model to the yield of gas-phase products and Auger signals as a function of the number of scans over the surface. The validity of the kinetic parameters is confirmed by comparison with the variation in friction coefficient as a function of the number of scans. The analysis reveals that both ethyl and methyl thiolate species decompose under shear at approximately the same rate and that the rate of surface-to-bulk transport is higher than for thiolate decomposition.
Fil: Adams, Heather. University of Wisconsin; Estados Unidos
Fil: Miller, Brendan P.. Chevron Oronite Company; Estados Unidos
Fil: Kotvis, Peter V.. University of Wisconsin; Estados Unidos
Fil: Furlong, Octavio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Fil: Martini, Ashlie. University of California; Estados Unidos
Fil: Tysoe, Wilfred T.. University of Wisconsin; Estados Unidos - Materia
-
Auger Spectroscopy
Boundary Film Formation
Copper
Dialkyl Disulfides
In Situ Analysis - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/60473
Ver los metadatos del registro completo
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In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on CopperAdams, HeatherMiller, Brendan P.Kotvis, Peter V.Furlong, Octavio JavierMartini, AshlieTysoe, Wilfred T.Auger SpectroscopyBoundary Film FormationCopperDialkyl DisulfidesIn Situ Analysishttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The reaction pathways and shear-induced kinetics of methyl thiolate and ethyl thiolate species on copper are measured using in situ and ex situ techniques in ultrahigh vacuum. The in situ techniques consist of measuring the gas-phase products using a mass spectrometer placed in-line-of-sight of the rubbing interface while monitoring the variation in friction coefficient of an alkyl thiolate-covered surface as a function of the number of times it is rubbed (referred to in the paper as "number of scans"). The rubbed surfaces are analyzed using Auger spectroscopy as a function of the number of scans. The experiments are carried out for a tungsten carbide ball covered by a copper transfer film on copper surface at a normal load of 0.44 N and a sliding speed of 4 mm/s. The shear-induced reaction occurs as RS(ads) → S(ads) → S(subsurface), where RS(ads) is an adsorbed alkyl thiolate species, S(ads) is adsorbed atomic sulfur, and S(subsurface) is subsurface sulfur formed by shear-induced surface-to-bulk transport. The rate constants for the sequential reaction steps are found by fitting an analytical kinetic model to the yield of gas-phase products and Auger signals as a function of the number of scans over the surface. The validity of the kinetic parameters is confirmed by comparison with the variation in friction coefficient as a function of the number of scans. The analysis reveals that both ethyl and methyl thiolate species decompose under shear at approximately the same rate and that the rate of surface-to-bulk transport is higher than for thiolate decomposition.Fil: Adams, Heather. University of Wisconsin; Estados UnidosFil: Miller, Brendan P.. Chevron Oronite Company; Estados UnidosFil: Kotvis, Peter V.. University of Wisconsin; Estados UnidosFil: Furlong, Octavio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Martini, Ashlie. University of California; Estados UnidosFil: Tysoe, Wilfred T.. University of Wisconsin; Estados UnidosSpringer/Plenum Publishers2016-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60473Adams, Heather; Miller, Brendan P.; Kotvis, Peter V.; Furlong, Octavio Javier; Martini, Ashlie; et al.; In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper; Springer/Plenum Publishers; Tribology Letters; 62; 4-2016; 1-91023-88831573-2711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s11249-016-0664-0info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs11249-016-0664-0info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:41:47Zoai:ri.conicet.gov.ar:11336/60473instacron: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 09:41:48.083CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
title |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
spellingShingle |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper Adams, Heather Auger Spectroscopy Boundary Film Formation Copper Dialkyl Disulfides In Situ Analysis |
title_short |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
title_full |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
title_fullStr |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
title_full_unstemmed |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
title_sort |
In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper |
dc.creator.none.fl_str_mv |
Adams, Heather Miller, Brendan P. Kotvis, Peter V. Furlong, Octavio Javier Martini, Ashlie Tysoe, Wilfred T. |
author |
Adams, Heather |
author_facet |
Adams, Heather Miller, Brendan P. Kotvis, Peter V. Furlong, Octavio Javier Martini, Ashlie Tysoe, Wilfred T. |
author_role |
author |
author2 |
Miller, Brendan P. Kotvis, Peter V. Furlong, Octavio Javier Martini, Ashlie Tysoe, Wilfred T. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Auger Spectroscopy Boundary Film Formation Copper Dialkyl Disulfides In Situ Analysis |
topic |
Auger Spectroscopy Boundary Film Formation Copper Dialkyl Disulfides In Situ Analysis |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The reaction pathways and shear-induced kinetics of methyl thiolate and ethyl thiolate species on copper are measured using in situ and ex situ techniques in ultrahigh vacuum. The in situ techniques consist of measuring the gas-phase products using a mass spectrometer placed in-line-of-sight of the rubbing interface while monitoring the variation in friction coefficient of an alkyl thiolate-covered surface as a function of the number of times it is rubbed (referred to in the paper as "number of scans"). The rubbed surfaces are analyzed using Auger spectroscopy as a function of the number of scans. The experiments are carried out for a tungsten carbide ball covered by a copper transfer film on copper surface at a normal load of 0.44 N and a sliding speed of 4 mm/s. The shear-induced reaction occurs as RS(ads) → S(ads) → S(subsurface), where RS(ads) is an adsorbed alkyl thiolate species, S(ads) is adsorbed atomic sulfur, and S(subsurface) is subsurface sulfur formed by shear-induced surface-to-bulk transport. The rate constants for the sequential reaction steps are found by fitting an analytical kinetic model to the yield of gas-phase products and Auger signals as a function of the number of scans over the surface. The validity of the kinetic parameters is confirmed by comparison with the variation in friction coefficient as a function of the number of scans. The analysis reveals that both ethyl and methyl thiolate species decompose under shear at approximately the same rate and that the rate of surface-to-bulk transport is higher than for thiolate decomposition. Fil: Adams, Heather. University of Wisconsin; Estados Unidos Fil: Miller, Brendan P.. Chevron Oronite Company; Estados Unidos Fil: Kotvis, Peter V.. University of Wisconsin; Estados Unidos Fil: Furlong, Octavio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina Fil: Martini, Ashlie. University of California; Estados Unidos Fil: Tysoe, Wilfred T.. University of Wisconsin; Estados Unidos |
description |
The reaction pathways and shear-induced kinetics of methyl thiolate and ethyl thiolate species on copper are measured using in situ and ex situ techniques in ultrahigh vacuum. The in situ techniques consist of measuring the gas-phase products using a mass spectrometer placed in-line-of-sight of the rubbing interface while monitoring the variation in friction coefficient of an alkyl thiolate-covered surface as a function of the number of times it is rubbed (referred to in the paper as "number of scans"). The rubbed surfaces are analyzed using Auger spectroscopy as a function of the number of scans. The experiments are carried out for a tungsten carbide ball covered by a copper transfer film on copper surface at a normal load of 0.44 N and a sliding speed of 4 mm/s. The shear-induced reaction occurs as RS(ads) → S(ads) → S(subsurface), where RS(ads) is an adsorbed alkyl thiolate species, S(ads) is adsorbed atomic sulfur, and S(subsurface) is subsurface sulfur formed by shear-induced surface-to-bulk transport. The rate constants for the sequential reaction steps are found by fitting an analytical kinetic model to the yield of gas-phase products and Auger signals as a function of the number of scans over the surface. The validity of the kinetic parameters is confirmed by comparison with the variation in friction coefficient as a function of the number of scans. The analysis reveals that both ethyl and methyl thiolate species decompose under shear at approximately the same rate and that the rate of surface-to-bulk transport is higher than for thiolate decomposition. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04 |
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/11336/60473 Adams, Heather; Miller, Brendan P.; Kotvis, Peter V.; Furlong, Octavio Javier; Martini, Ashlie; et al.; In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper; Springer/Plenum Publishers; Tribology Letters; 62; 4-2016; 1-9 1023-8883 1573-2711 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/60473 |
identifier_str_mv |
Adams, Heather; Miller, Brendan P.; Kotvis, Peter V.; Furlong, Octavio Javier; Martini, Ashlie; et al.; In Situ Measurements of Boundary Film Formation Pathways and Kinetics: Dimethyl and Diethyl Disulfide on Copper; Springer/Plenum Publishers; Tribology Letters; 62; 4-2016; 1-9 1023-8883 1573-2711 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11249-016-0664-0 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs11249-016-0664-0 |
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 |
Springer/Plenum Publishers |
publisher.none.fl_str_mv |
Springer/Plenum 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 |
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1844613318444056576 |
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13.070432 |