Novel Metal Oxide Composite Coatings for Antimicrobial and Anticorrosion Applications

Project: Research

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The bacterial contamination has been a major problem in many fields such as food, beverage, cosmetics, medical clinics, and other health care settings. For this reason, it will be essential to develop new material surfaces with a long lasting antimicrobial activity, without the risk of generating multidrug-resistant microorganisms. It has been reported that the some metal oxides such as MoOxand WOx(2 less than x less than 3) particles exhibited the efficient antimicrobial properties, due to the acidic surface reaction. In this study, tungsten oxide (WOx) hard coatings as well as WOx/Ag composite coatings will be fabricated by reactive closed field unbalanced magnetron sputtering on metal substrates. The addition of silver (Ag) results in the formation of Ag particles dispersed throughout the deposited coatings. The composition, microstructure and morphology of the coatings will be analyzed with respect to the changes in deposition conditions. In addition, the mechanical, tribological and electrochemical properties of the resultant coatings will also be studied. The antimicrobial activity will be assessed by the silver ion release test and the plate-counting method. Further, the relationship between the silver ion release and the antimicrobial activity will be explored. Such coatings may fulfill the multiple functions of wear resistance, corrosion resistance and antimicrobial properties.


Project number9667152
Effective start/end date1/06/17 → …