Formation of dense cellulose monolayers on silver surfaces

Detalhes bibliográficos
Autor(a) principal: Soo,Whan Choi
Data de Publicação: 2000
Outros Autores: Lauer,Heike, Wenz,Gerhard, Bruns,Michael, Petri,Denise F. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000100003
Resumo: The adsorption of a new cellulose derivative,6-O-(2,3-bis(thiosulfato) propyl-oxy-2-hydroxy-propyl)-cellulose (TSHP), onto silver surfaces was investigated by means of ellipsometry, contact angle measurements and X-ray photoelectron spectroscopy (XPS). The results showed that the formation of a dense TSHP monolayer on silver surfaces is an irreversible and slow process. Based on XPS results a model was proposed to explain the chemisorption of TSHP on silver substrates. This model considers the homolytical cleavage of the thiosulfate groups attached to the cellulose chains with the formation of thio radicals, which bind covalently to the silver surface. The formation of silver thiolates lead to a stable TSHP monolayer on silver surfaces.
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spelling Formation of dense cellulose monolayers on silver surfacesadsorptioncellulosesurface analysisThe adsorption of a new cellulose derivative,6-O-(2,3-bis(thiosulfato) propyl-oxy-2-hydroxy-propyl)-cellulose (TSHP), onto silver surfaces was investigated by means of ellipsometry, contact angle measurements and X-ray photoelectron spectroscopy (XPS). The results showed that the formation of a dense TSHP monolayer on silver surfaces is an irreversible and slow process. Based on XPS results a model was proposed to explain the chemisorption of TSHP on silver substrates. This model considers the homolytical cleavage of the thiosulfate groups attached to the cellulose chains with the formation of thio radicals, which bind covalently to the silver surface. The formation of silver thiolates lead to a stable TSHP monolayer on silver surfaces.Sociedade Brasileira de Química2000-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000100003Journal of the Brazilian Chemical Society v.11 n.1 2000reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532000000100003info:eu-repo/semantics/openAccessSoo,Whan ChoiLauer,HeikeWenz,GerhardBruns,MichaelPetri,Denise F. S.eng2000-06-01T00:00:00Zoai:scielo:S0103-50532000000100003Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2000-06-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Formation of dense cellulose monolayers on silver surfaces
title Formation of dense cellulose monolayers on silver surfaces
spellingShingle Formation of dense cellulose monolayers on silver surfaces
Soo,Whan Choi
adsorption
cellulose
surface analysis
title_short Formation of dense cellulose monolayers on silver surfaces
title_full Formation of dense cellulose monolayers on silver surfaces
title_fullStr Formation of dense cellulose monolayers on silver surfaces
title_full_unstemmed Formation of dense cellulose monolayers on silver surfaces
title_sort Formation of dense cellulose monolayers on silver surfaces
author Soo,Whan Choi
author_facet Soo,Whan Choi
Lauer,Heike
Wenz,Gerhard
Bruns,Michael
Petri,Denise F. S.
author_role author
author2 Lauer,Heike
Wenz,Gerhard
Bruns,Michael
Petri,Denise F. S.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Soo,Whan Choi
Lauer,Heike
Wenz,Gerhard
Bruns,Michael
Petri,Denise F. S.
dc.subject.por.fl_str_mv adsorption
cellulose
surface analysis
topic adsorption
cellulose
surface analysis
description The adsorption of a new cellulose derivative,6-O-(2,3-bis(thiosulfato) propyl-oxy-2-hydroxy-propyl)-cellulose (TSHP), onto silver surfaces was investigated by means of ellipsometry, contact angle measurements and X-ray photoelectron spectroscopy (XPS). The results showed that the formation of a dense TSHP monolayer on silver surfaces is an irreversible and slow process. Based on XPS results a model was proposed to explain the chemisorption of TSHP on silver substrates. This model considers the homolytical cleavage of the thiosulfate groups attached to the cellulose chains with the formation of thio radicals, which bind covalently to the silver surface. The formation of silver thiolates lead to a stable TSHP monolayer on silver surfaces.
publishDate 2000
dc.date.none.fl_str_mv 2000-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000100003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000100003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532000000100003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.11 n.1 2000
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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