Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties

Autores
Cajiao Checchin, Valentina Chiara; Cacciari, Rodolfo; Rubert, Aldo Alberto; Lieblich, Marcela; Caregnato, Paula; Fagali, Natalia; Fernández Lorenzo de Mele, Mónica Alicia
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Electrochemical modification of the Ti surface to obtain TiO₂ nanotubes (NT-Ti) has been proposed to enhance osseointegration in medical applications. However, susceptibility to microbial adhesion, linked to biomaterial-associated infections, and the high TiO₂ band gap energy, which allows light absorption almost exclusively in the ultraviolet (UV) region, limit its applications. Modifying the TiO₂ semiconductor with metals such as Ag has been suggested both for antimicrobial purposes and for absorbing light in the visible region. The formation of NT-Ti with Ag micropatches (Ag-NT-Ti) is pursued with the objective of enhancing the stability of the deposits and preventing cytotoxic levels of Ag cellular uptake. The innovative process proposed here involves immersing NT-Ti in a AgNO₃ solution as the initial step. Diverging from previously reported electrochemical methods, this process incorporates anodization within the TiO₂ oxide formation region instead of cathodic reduction generally employed by other researchers. The final step encompasses an annealing treatment. The treatments result in the in situ Ag¹⁺ reduction and formation of stable and active micropatches of metallic Ag on the NT-Ti surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman, diffuse reflectance spectroscopy (DRS), wettability assessment, and electrochemical characterizations were conducted to evaluate the modified surfaces. The well-known properties of NT-Ti surfaces were enhanced, leading to improved photocatalytic activity across both visible and UV regions, significant stability against detachment, and controlled release of Ag¹⁺ for promising antimicrobial effects.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Irradiation
Metal nanoparticles
Nanotubes
Oxides
X-ray photoelectron spectroscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/167279
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/167279
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical propertiesCajiao Checchin, Valentina ChiaraCacciari, RodolfoRubert, Aldo AlbertoLieblich, MarcelaCaregnato, PaulaFagali, NataliaFernández Lorenzo de Mele, Mónica AliciaQuímicaIrradiationMetal nanoparticlesNanotubesOxidesX-ray photoelectron spectroscopyElectrochemical modification of the Ti surface to obtain TiO₂ nanotubes (NT-Ti) has been proposed to enhance osseointegration in medical applications. However, susceptibility to microbial adhesion, linked to biomaterial-associated infections, and the high TiO₂ band gap energy, which allows light absorption almost exclusively in the ultraviolet (UV) region, limit its applications. Modifying the TiO₂ semiconductor with metals such as Ag has been suggested both for antimicrobial purposes and for absorbing light in the visible region. The formation of NT-Ti with Ag micropatches (Ag-NT-Ti) is pursued with the objective of enhancing the stability of the deposits and preventing cytotoxic levels of Ag cellular uptake. The innovative process proposed here involves immersing NT-Ti in a AgNO₃ solution as the initial step. Diverging from previously reported electrochemical methods, this process incorporates anodization within the TiO₂ oxide formation region instead of cathodic reduction generally employed by other researchers. The final step encompasses an annealing treatment. The treatments result in the in situ Ag¹⁺ reduction and formation of stable and active micropatches of metallic Ag on the NT-Ti surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman, diffuse reflectance spectroscopy (DRS), wettability assessment, and electrochemical characterizations were conducted to evaluate the modified surfaces. The well-known properties of NT-Ti surfaces were enhanced, leading to improved photocatalytic activity across both visible and UV regions, significant stability against detachment, and controlled release of Ag¹⁺ for promising antimicrobial effects.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf9644−9654http://sedici.unlp.edu.ar/handle/10915/167279enginfo:eu-repo/semantics/altIdentifier/issn/2470-1343info:eu-repo/semantics/altIdentifier/doi/10.1021/acsomega.3c09687info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:16:28Zoai:sedici.unlp.edu.ar:10915/167279Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:16:29.104SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
title Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
spellingShingle Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
Cajiao Checchin, Valentina Chiara
Química
Irradiation
Metal nanoparticles
Nanotubes
Oxides
X-ray photoelectron spectroscopy
title_short Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
title_full Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
title_fullStr Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
title_full_unstemmed Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
title_sort Innovative anodic treatment to obtain stable metallic silver micropatches on TiO₂ nanotubes: structural, electrochemical, and photochemical properties
dc.creator.none.fl_str_mv Cajiao Checchin, Valentina Chiara
Cacciari, Rodolfo
Rubert, Aldo Alberto
Lieblich, Marcela
Caregnato, Paula
Fagali, Natalia
Fernández Lorenzo de Mele, Mónica Alicia
author Cajiao Checchin, Valentina Chiara
author_facet Cajiao Checchin, Valentina Chiara
Cacciari, Rodolfo
Rubert, Aldo Alberto
Lieblich, Marcela
Caregnato, Paula
Fagali, Natalia
Fernández Lorenzo de Mele, Mónica Alicia
author_role author
author2 Cacciari, Rodolfo
Rubert, Aldo Alberto
Lieblich, Marcela
Caregnato, Paula
Fagali, Natalia
Fernández Lorenzo de Mele, Mónica Alicia
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Química
Irradiation
Metal nanoparticles
Nanotubes
Oxides
X-ray photoelectron spectroscopy
topic Química
Irradiation
Metal nanoparticles
Nanotubes
Oxides
X-ray photoelectron spectroscopy
dc.description.none.fl_txt_mv Electrochemical modification of the Ti surface to obtain TiO₂ nanotubes (NT-Ti) has been proposed to enhance osseointegration in medical applications. However, susceptibility to microbial adhesion, linked to biomaterial-associated infections, and the high TiO₂ band gap energy, which allows light absorption almost exclusively in the ultraviolet (UV) region, limit its applications. Modifying the TiO₂ semiconductor with metals such as Ag has been suggested both for antimicrobial purposes and for absorbing light in the visible region. The formation of NT-Ti with Ag micropatches (Ag-NT-Ti) is pursued with the objective of enhancing the stability of the deposits and preventing cytotoxic levels of Ag cellular uptake. The innovative process proposed here involves immersing NT-Ti in a AgNO₃ solution as the initial step. Diverging from previously reported electrochemical methods, this process incorporates anodization within the TiO₂ oxide formation region instead of cathodic reduction generally employed by other researchers. The final step encompasses an annealing treatment. The treatments result in the in situ Ag¹⁺ reduction and formation of stable and active micropatches of metallic Ag on the NT-Ti surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman, diffuse reflectance spectroscopy (DRS), wettability assessment, and electrochemical characterizations were conducted to evaluate the modified surfaces. The well-known properties of NT-Ti surfaces were enhanced, leading to improved photocatalytic activity across both visible and UV regions, significant stability against detachment, and controlled release of Ag¹⁺ for promising antimicrobial effects.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Electrochemical modification of the Ti surface to obtain TiO₂ nanotubes (NT-Ti) has been proposed to enhance osseointegration in medical applications. However, susceptibility to microbial adhesion, linked to biomaterial-associated infections, and the high TiO₂ band gap energy, which allows light absorption almost exclusively in the ultraviolet (UV) region, limit its applications. Modifying the TiO₂ semiconductor with metals such as Ag has been suggested both for antimicrobial purposes and for absorbing light in the visible region. The formation of NT-Ti with Ag micropatches (Ag-NT-Ti) is pursued with the objective of enhancing the stability of the deposits and preventing cytotoxic levels of Ag cellular uptake. The innovative process proposed here involves immersing NT-Ti in a AgNO₃ solution as the initial step. Diverging from previously reported electrochemical methods, this process incorporates anodization within the TiO₂ oxide formation region instead of cathodic reduction generally employed by other researchers. The final step encompasses an annealing treatment. The treatments result in the in situ Ag¹⁺ reduction and formation of stable and active micropatches of metallic Ag on the NT-Ti surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman, diffuse reflectance spectroscopy (DRS), wettability assessment, and electrochemical characterizations were conducted to evaluate the modified surfaces. The well-known properties of NT-Ti surfaces were enhanced, leading to improved photocatalytic activity across both visible and UV regions, significant stability against detachment, and controlled release of Ag¹⁺ for promising antimicrobial effects.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/167279
url http://sedici.unlp.edu.ar/handle/10915/167279
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2470-1343
info:eu-repo/semantics/altIdentifier/doi/10.1021/acsomega.3c09687
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
9644−9654
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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