Structured ZnO and Al2O3/Ag Surfaces: Antibacteriality, Photocatalytic Activity and Durability
Research output: Book/Report › Doctoral thesis
|Publisher||Tampere University of Technology|
|Number of pages||88|
|State||Published - 29 Nov 2018|
|Publication type||G5 Doctoral dissertation (article)|
|Name||Tampere University of Technology. Publication|
In this study, we have prepared, analyzed, and investigated the properties of two selfcleaning, antibacterial surfaces: a superhydrophobic silver-containing coating and a photocatalytic ZnO film. ZnO is a photocatalyst with an additional antibacterial property that is attributed to its semiconductor properties, in addition to the toxicity of zinc ions against bacteria. In this work, we have demonstrated a route for preparing superhydrophobic silver-containing coatings and studied their antibacterial efficiency. We have also studied the effect of synthesis parameters on the structure of ZnO films. The influence of the structure of the ZnO film on functional properties, photocatalytic, and antibacterial activity has also been investigated. Moreover, we have demonstrated the functionality of silvercontaining superhydrophobic surfaces as effective antibacterial coatings. The approach of using two functional mechanisms, superhydrophobicity and antibacterial silver, offers great potential for self-cleaning applications. In addition, this study shows the antibacterial effectiveness of ZnO in dark conditions as well as the relatively high photocatalytic activity of structured ZnO films, on the basis of which we can anticipate enhanced antibacterial activity under irradiation. The chemical stability of the surfaces has been investigated in order to estimate the usability of the surfaces in varying environments. Based on the knowledge obtained in this study, the prospects of using superhydrophobic silvercontaining coatings and ZnO films in applications requiring antibacterial and self-cleaning properties are discussed.