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HomeMaterials Science ForumMaterials Science Forum Vol. 859Ag-Enhanced Antibacterial Property of MgO Film

Ag-Enhanced Antibacterial Property of MgO Film

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Abstract:

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.

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Materials for Modern Technologies II

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Periodical:

Materials Science Forum (Volume 859)

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90-95

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https://doi.org/10.4028/www.scientific.net/MSF.859.90

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May 2016

Authors:

Zafer Alajmi, Tao Fu*, Yan Tao Zhao, Shui Yun Yang, Jia Mao Sun

Keywords:

Ag, Antibacterial, Corrosion, MgO, Sol-Gel, Ti

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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