The effect of Staphylococcus aureus on the electrochemical behavior of porous Ti-6Al-4V alloy
| Autor: | Claudio Aguilar, Armelle Ringuedé, Mariana Walter, Ersan Gürbüz, Hugo Muñoz, Carolina Guerra, Manuel Azocar, Michel Cassir, Mamie Sancy, Daniela Silva, Lisa Muñoz |
|---|---|
| Přispěvatelé: | Institut de Recherche de Chimie Paris (IRCP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ministère de la Culture (MC), Departamento de Ingenieria Mecanica y Metalurgica, Pontificia Universidad Católica de Chile (UC), Departamento de Ingenieria Metalurgica y de Materiales, Universidad Tecnica Federico Santa Maria [Valparaiso] (UTFSM), Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie (LECIME - UMR 7575) (LECIME), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Staphylococcus aureus
Materials science Alloy Biophysics Oxide 02 engineering and technology engineering.material 01 natural sciences Corrosion chemistry.chemical_compound X-ray photoelectron spectroscopy Electrochemistry Alloys Physical and Theoretical Chemistry Porosity Bone regeneration Polarization (electrochemistry) ComputingMilieux_MISCELLANEOUS Titanium Photoelectron Spectroscopy 010401 analytical chemistry General Medicine Electrochemical Techniques [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Dielectric spectroscopy Chemical engineering chemistry 13. Climate action Dielectric Spectroscopy engineering Microscopy Electron Scanning 0210 nano-technology |
| Zdroj: | Bioelectrochemistry Bioelectrochemistry, Elsevier, 2020, 136, pp.107622. ⟨10.1016/j.bioelechem.2020.107622⟩ |
| ISSN: | 1567-5394 |
| DOI: | 10.1016/j.bioelechem.2020.107622⟩ |
| Popis: | Ti-6Al-4V alloy has been widely investigated for biomedical applications due to its low density, high specific strength, and favorable corrosion resistance. However, some reported failures have imposed a challenge to improve bone regeneration and fixation, as well as antibacterial properties. A further opportunity for solving this problem is the introduction of porosity. However, this can induce metallic release and corrosion product formation. In this work, a Ti-6Al-4V alloy was exposed to Hank’s solution, sterilized and inoculated with Staphylococcus aureus at 37 °C. Surface analysis was carried out by SEM-EDS and XPS. Electrochemical measurements were also performed using chronopotentiometry at open circuit potential, polarization curves, and electrochemical impedance spectroscopy. After exposure, FE-SEM showed some colonies of S. aureus on the sample with 22% porosity. However, XPS analysis revealed that the presence of bacterium influenced the composition of the oxide layer, even more drastically with the increase in added porosity. Moreover, the impedance analysis showed De Levie's behavior, revealing a reduction of pore resistance and modulus of the impedance in the low frequency range in inoculated medium, and polarization curves showed that the passivity potential range was decreased, whereas the passivity current increased in the presence of the S. aureus. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect