INDUSTRIAL MAGNETRON SPUTTERING OF ZRN/CU NANOSTRUCTURED COATINGS FOR ANTI-BACTERIAL PURPOSES

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Authors

BEHRANGI Sahand SUKOVÁ Gabriela BURŠÍKOVÁ Vilma SOUČEK Pavel SEDLÁČEK Ivo SOCHORA Vjačeslav VAŠINA Petr

Year of publication 2021
Type Article in Proceedings
Conference Proceedings 13th International Conference on Nanomaterials - Research & Application
MU Faculty or unit

Faculty of Science

Citation
Web https://doi.org/10.37904/nanocon.2021.4314
Doi http://dx.doi.org/10.37904/nanocon.2021.4314
Keywords Anti-bacterial efficiency; Bacteria; Chemical composition; Hardness; Magnetron sputtering
Description In the present study, the anti-bacterial and mechanical properties of the ZrN/Cu nanostructured coatings were studied. Copper was introduced as the anti-bacterial agent owing to its substantial activity against bacteria. Industrial reactive magnetron sputtering was utilized to synthesize the films with varying copper contents. Mechanical properties were measured using nanoindentation and discussed in relation to the chemical composition. The inhibitory efficiency of the films was tested against the two most common bacteria, including gram-negative (E. coli) and gram-positive (S. aureus) bacteria. We observed that the anti-bacterial efficiency of the samples significantly improved with increasing the copper amount. After 80 min exposure, the coatings with copper amount >12 at% showed 100% activity against both types of bacteria. The highest hardness measured was 28.5 GPa for the low copper coating followed by a gradual decrease with increasing copper.
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