Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications

We report for the first time the use of polyhistidine (Polyhis) to efficiently disperse multiwall carbon nanotubes (MWCNTs). The optimum dispersion MWCNT-Polyhis was obtained by sonicating for 30min 1.0mgmL -1 MWCNTs in 0.25mgmL -1 Polyhis solution prepared in 75:25 (v/v) ethanol/0.200M acetate buff...

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Detalhes bibliográficos
Autores: Dalmasso, Pablo Roberto, Pedano, Maria Laura, Rivas, Gustavo Adolfo
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/62103
Acesso em linha:http://hdl.handle.net/11336/62103
Access Level:acceso abierto
Palavra-chave:Ascorbic Acid
Carbon Nanotubes Dispersion
Dopamine
Glassy Carbon Electrode
Polyhistidine
Uric Acid
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
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spelling Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applicationsDalmasso, Pablo RobertoPedano, Maria LauraRivas, Gustavo AdolfoAscorbic AcidCarbon Nanotubes DispersionDopamineGlassy Carbon ElectrodePolyhistidineUric Acidhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1We report for the first time the use of polyhistidine (Polyhis) to efficiently disperse multiwall carbon nanotubes (MWCNTs). The optimum dispersion MWCNT-Polyhis was obtained by sonicating for 30min 1.0mgmL -1 MWCNTs in 0.25mgmL -1 Polyhis solution prepared in 75:25 (v/v) ethanol/0.200M acetate buffer solution pH 5.00. The dispersion was characterized by scanning electron microscopy, and by cyclic voltammetry and amperometry using ascorbic acid as redox marker. The modification of glassy carbon electrodes with MWCNT-Polyhis produces a drastic decrease in the overvoltage for the oxidation of ascorbic acid (580mV) at variance with the response observed at glassy carbon electrodes modified just with Polyhis, where the charge transfer is more difficult due to the blocking effect of the polymer. The reproducibility for the sensitivities obtained after 10 successive calibration plots using the same surface was 6.3%. The MWCNT-modified glassy carbon electrode demonstrated to be highly stable since after 45 days storage at room temperature the response was 94.0% of the original. The glassy carbon electrode modified with MWCNT-Polyhis dispersion was successfully used to quantify dopamine or uric acid at nanomolar levels, even in the presence of large excess of ascorbic acid. Determinations of uric acid in human blood serum samples demonstrated a very good correlation with the value reported by Wienner laboratory. © 2011 Elsevier B.V.Fil: Dalmasso, Pablo Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Pedano, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Rivas, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaElsevier Science2012-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/62103Dalmasso, Pablo Roberto; Pedano, Maria Laura; Rivas, Gustavo Adolfo; Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications; Elsevier Science; Analytica Chimica Acta; 710; 1-2012; 58-640003-2670CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.aca.2011.10.050info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0003267011014309info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:57:12Zoai:ri.conicet.gov.ar:11336/62103instacron: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:34982024-05-08 13:57:12.569CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
title Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
spellingShingle Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
Dalmasso, Pablo Roberto
Ascorbic Acid
Carbon Nanotubes Dispersion
Dopamine
Glassy Carbon Electrode
Polyhistidine
Uric Acid
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
title_short Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
title_full Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
title_fullStr Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
title_full_unstemmed Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
title_sort Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications
dc.creator.none.fl_str_mv Dalmasso, Pablo Roberto
Pedano, Maria Laura
Rivas, Gustavo Adolfo
author Dalmasso, Pablo Roberto
author_facet Dalmasso, Pablo Roberto
Pedano, Maria Laura
Rivas, Gustavo Adolfo
author_role author
author2 Pedano, Maria Laura
Rivas, Gustavo Adolfo
author2_role author
author
dc.subject.none.fl_str_mv Ascorbic Acid
Carbon Nanotubes Dispersion
Dopamine
Glassy Carbon Electrode
Polyhistidine
Uric Acid
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
topic Ascorbic Acid
Carbon Nanotubes Dispersion
Dopamine
Glassy Carbon Electrode
Polyhistidine
Uric Acid
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
description We report for the first time the use of polyhistidine (Polyhis) to efficiently disperse multiwall carbon nanotubes (MWCNTs). The optimum dispersion MWCNT-Polyhis was obtained by sonicating for 30min 1.0mgmL -1 MWCNTs in 0.25mgmL -1 Polyhis solution prepared in 75:25 (v/v) ethanol/0.200M acetate buffer solution pH 5.00. The dispersion was characterized by scanning electron microscopy, and by cyclic voltammetry and amperometry using ascorbic acid as redox marker. The modification of glassy carbon electrodes with MWCNT-Polyhis produces a drastic decrease in the overvoltage for the oxidation of ascorbic acid (580mV) at variance with the response observed at glassy carbon electrodes modified just with Polyhis, where the charge transfer is more difficult due to the blocking effect of the polymer. The reproducibility for the sensitivities obtained after 10 successive calibration plots using the same surface was 6.3%. The MWCNT-modified glassy carbon electrode demonstrated to be highly stable since after 45 days storage at room temperature the response was 94.0% of the original. The glassy carbon electrode modified with MWCNT-Polyhis dispersion was successfully used to quantify dopamine or uric acid at nanomolar levels, even in the presence of large excess of ascorbic acid. Determinations of uric acid in human blood serum samples demonstrated a very good correlation with the value reported by Wienner laboratory. © 2011 Elsevier B.V.
publishDate 2012
dc.date.none.fl_str_mv 2012-01
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/11336/62103
Dalmasso, Pablo Roberto; Pedano, Maria Laura; Rivas, Gustavo Adolfo; Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications; Elsevier Science; Analytica Chimica Acta; 710; 1-2012; 58-64
0003-2670
CONICET Digital
CONICET
url http://hdl.handle.net/11336/62103
identifier_str_mv Dalmasso, Pablo Roberto; Pedano, Maria Laura; Rivas, Gustavo Adolfo; Dispersion of multi-wall carbon nanotubes in polyhistidine: Characterization and analytical applications; Elsevier Science; Analytica Chimica Acta; 710; 1-2012; 58-64
0003-2670
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.aca.2011.10.050
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0003267011014309
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 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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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score 15.811543

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