Effect of NaOH etching and oxygen plasma treatments on surface characteristics and their potential to activate micro-arc oxidized TiO2 coatings

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade do Porto-
Autor(es): dc.contributorRua Alfredo Allen-
Autor(es): dc.contributorNanoSafety Group-
Autor(es): dc.contributorCBPF - Centro Brasileiro de Pesquisas Físicas-
Autor(es): dc.contributorRua de Jorge Viterbo Ferreira-
Autor(es): dc.creatorCosta, Natália A.-
Autor(es): dc.creatorRibeiro, Ana R.-
Autor(es): dc.creatorRossi, André L.-
Autor(es): dc.creatorMonteiro, Cláudia-
Autor(es): dc.creatorLisboa-Filho, Paulo N.-
Autor(es): dc.creatorMartins, M. Cristina L.-
Data de aceite: dc.date.accessioned2025-08-21T16:23:41Z-
Data de disponibilização: dc.date.available2025-08-21T16:23:41Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-02-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2024.161748-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/309035-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/309035-
Descrição: dc.descriptionActivation treatments such as NaOH etching or O2 plasma can play an essential role in surface conjugation of titanium with biomolecules, providing a better interaction at the bone-implant interface. However, their application on complex titanium dioxide (TiO2) surfaces is still not explored. In this contribution, bioactive and porous TiO2 coatings produced by micro-arc oxidation (MAO) were treated with NaOH etching or O2 plasma and then placed in contact with a reactive isocyanate test compound to evaluate the potential of molecule conjugation. Results suggested that O2 plasma treatment has only changed the surface chemistry of the coating through carbon contaminants removal, plasma-driven oxidation and generation of functional OH species, including reactive carboxyl groups. This chemical modification by plasma has made the surface superhydrophilic. After NaOH etching, the coating became rougher and also superhydrophilic, containing titanate structures doped with sodium and calcium on its surface and inside the inner pores. Upon reaction with butyl isocyanate, the O2 plasma-treated surfaces seem to better provide molecule conjugation, introducing characteristic conjugation bonds, and also making MAO coatings more hydrophobic due to the surface-terminated methyl chains from isocyanate. This proof-of-concept study has demonstrated the promising grafting potential given by O2 plasma on complex TiO2 surfaces.-
Descrição: dc.descriptionUNESP - Universidade Estadual Paulista Faculdade de Ciências, SP-
Descrição: dc.descriptioni3S - Instituto de Investigação e Inovação em Saúde Universidade do Porto-
Descrição: dc.descriptionINEB - Instituto de Engenharia Biomédica Universidade do Porto Rua Alfredo Allen-
Descrição: dc.descriptionFEUP - Faculdade de Engenharia Departamento de Engenharia Metalúrgica e de Materiais Universidade do Porto-
Descrição: dc.descriptionINL - International Iberian Nanotechnology Laboratory NanoSafety Group-
Descrição: dc.descriptionCBPF - Centro Brasileiro de Pesquisas Físicas, RJ-
Descrição: dc.descriptionICBAS - Instituto de Ciências Biomédicas Abel Salazar Universidade do Porto Rua de Jorge Viterbo Ferreira-
Descrição: dc.descriptionUNESP - Universidade Estadual Paulista Faculdade de Ciências, SP-
Idioma: dc.languageen-
Relação: dc.relationApplied Surface Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectMicro-arc oxidation-
Palavras-chave: dc.subjectMolecule conjugation-
Palavras-chave: dc.subjectNaOH etching-
Palavras-chave: dc.subjectOxygen plasma-
Palavras-chave: dc.subjectSurface functionalization-
Palavras-chave: dc.subjectTitanium-
Título: dc.titleEffect of NaOH etching and oxygen plasma treatments on surface characteristics and their potential to activate micro-arc oxidized TiO2 coatings-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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