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Innovative Anodic Treatment to Obtain Stable Metallic Silver Micropatches on TiO2 Nanotubes: Structural, Electrochemical, and Photochemical Properties.
Cajiao Checchin, Valentina C; Cacciari, Rodolfo D; Rubert, Aldo A; Lieblich, Marcela; Caregnato, Paula; Fagali, Natalia S; Fernández Lorenzo de Mele, Mónica.
Afiliação
  • Cajiao Checchin VC; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
  • Cacciari RD; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
  • Rubert AA; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
  • Lieblich M; Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), 28040 Madrid, Spain.
  • Caregnato P; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
  • Fagali NS; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
  • Fernández Lorenzo de Mele M; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina.
ACS Omega ; 9(8): 9644-9654, 2024 Feb 27.
Article em En | MEDLINE | ID: mdl-38434842
ABSTRACT
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Omega Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Omega Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos