Corrosion, antibacterial activity and haemocompatibility of TiO2 nanotubes as a function of their annealing temperature. (February 2016)

• Record Type: Journal Article
• Authors: Mazare, Anca; Totea, Georgeta; Burnei, Cristian; Schmuki, Patrik; Demetrescu, Ioana; Ionita, Daniela
• Is Part Of: Corrosion science. Volume 103(2016)
• Page Start: 215
• Page End: 222
• Publication Date: 2016-02
• Subjects: A. Titanium -- B. SEM -- B. XRD -- B. Potentiostatic -- C. Anodic films; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.11.021
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: TiO2 nanotubes were grown via anodization, and were subsequently annealed. Annealing at temperature 550 °C results in the growth of a thermal rutile oxide layer. Corrosion resistance was significantly improved with higher annealing T. Higher temperature annealing inhibits the growth of S. aureus and P. aeruginosa. Non-haemolytic behavior was observed for higher temperature annealed nanotubes. Abstract: The present work reports on the corrosion behavior and antibacterial activity of self-organized TiO2 nanotubes in dependence of annealing temperature. TiO2 nanotubes are grown by anodic oxidation of Ti and are further annealed (350–750 °C). Besides the morphological and compositional changes due to annealing, the corrosion resistance and antibacterial activity are significantly improved. Namely, antibacterial activity of 650 °C and 750 °C annealed nanotubes shows the best results for Staphylococcus aureus and Pseudomonas aeruginosa, with 40% and 80% increase in the growth inhibition index, respectively. Furthermore, such nanostructures are non-haemolytic and present enhanced haemocompatibility compared to amorphous or lower-temperature annealed nanotubes.