Bakhsheshi-Rad, H. R. and Hamzah, E. and Kasiri-Asgarani, M. and Saud, S. N. and Yaghoubidoust, F. and Akbari, E. (2016) Structure, corrosion behavior, and antibacterial properties of nano-silica/graphene oxide coating on biodegradable magnesium alloy for biomedical applications. Vacuum, 131 . pp. 106-110. ISSN 0042-207X
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Abstract
In the present study, a novel nano-silica (SiO2)/graphene oxide (GO) coating was deposited on Mg alloy via physical vapor deposition (PVD) combined with dip coating. The structural characterization clearly revealed that the nano-SiO2 underlayer had a compact columnar microstructure with a thickness of 1 μm, while the GO overlayer presented a sheet-like morphology with a thickness of around 30 μm. The in-vitro degradation rate revealed that the presence of GO as an overlayer on the nano-SiO2 layer significantly decreased the corrosion rate of the Mg alloy. The antibacterial results demonstrated that the both nano-SiO2/GO and nano-SiO2 coatings exhibited a strong antibacterial activity against the Streptococcus mutans. However, the nano-SiO2/GO coating exhibited better antibacterial activity compared to the nano-SiO2 coated and uncoated samples. These results exhibit that nano-SiO2/GO coating has effective antibacterial activity and high corrosion resistance in vitro, thus, it can be considered as a promising material for implant applications.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Biodegradation, Corrosion, Corrosion rate, Corrosion resistance, Corrosive effects, Degradation, Graphene, Magnesium, Magnesium alloys, Medical applications, Physical vapor deposition, Protective coatings, Silica, Anti-bacterial activity, Antibacterial properties, Biodegradable magnesium alloys, Biomedical applications, Columnar microstructures, Corrosion behavior, Graphene oxides, Structural characterization, Coatings |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 72167 |
| Deposited By: | Fazli Masari |
| Deposited On: | 23 Nov 2017 06:19 |
| Last Modified: | 23 Nov 2017 06:19 |
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