Ag-Enhanced Antibacterial Property of MgO Film
| Autor: | Jia Mao Sun, Tao Fu, Yan Tao Zhao, Shui Yun Yang, Zafer Alajmi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope 020502 materials Mechanical Engineering Metallurgy chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Silver nanoparticle 0205 materials engineering X-ray photoelectron spectroscopy chemistry Mechanics of Materials Surface modification General Materials Science 0210 nano-technology Polarization (electrochemistry) Dissolution Nuclear chemistry Titanium Sol-gel |
| Zdroj: | Materials Science Forum. 859:90-95 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.859.90 |
| Popis: | MgO and silver-containing MgO (AgMgO, 3.3, 9.1 at% Ag) films were sol-gel coated on titanium to improve its antibacterial property. Thermal analyses of MgAc2·4H2O powder revealed that MgO was crystallized at 400 °C. X-ray diffraction analysis showed that MgO was converted to Mg(OH)2 or Mg5(CO3)4(OH)2·4H2O during the ageing in air. Silver nanoparticles at the surface of AgMgO films were identified by scanning electron microscopy and x-ray photoelectron spectroscopy. The MgO film was about 1.5 um thick. The potentiodynamic polarization test in the Ca-free Hank’s balanced salt solution showed that the coated titanium samples had better corrosion resistance than the polished one. The dissolution of silver nanoparticles resulted in a current peak in the polarization plots. In the antibacterial test against E. Coli, the inhibition zone width was 0.3, 1.6, 2.0 mm for the films with 0, 3.3, 9.1 at% Ag, respectively. The bactericidal mechanisms of the MgO and AgMgO films were discussed. The present work would provide a facile method for antibacterial surface modification of titanium based osteo-implants. |
| Databáze: | OpenAIRE |
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