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Photocatalytical Antibacterial Activity of Mixed-Phase TiO2 Nanocomposite Thin Films against Aggregatibacter actinomycetemcomitans.
- Source :
-
BioMed research international [Biomed Res Int] 2015; Vol. 2015, pp. 705871. Date of Electronic Publication: 2015 Oct 21. - Publication Year :
- 2015
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Abstract
- Mixed-phase TiO2 nanocomposite thin films consisting of anatase and rutile prepared on commercially pure Ti sheets via the electrochemical anodization and annealing treatments were investigated in terms of their photocatalytic activity for antibacterial use around dental implants. The resulting films were characterized by scanning electron microscopy (SEM), and X-ray diffraction (XRD). The topology was assessed by White Light Optical Profiling (WLOP) in the Vertical Scanning Interferometer (VSI) mode. Representative height descriptive parameters of roughness R a and R z were calculated. The photocatalytic activity of the resulting TiO2 films was evaluated by the photodegradation of Rhodamine B (RhB) dye solution. The antibacterial ability of the photocatalyst was examined by Aggregatibacter actinomycetemcomitans suspensions in a colony-forming assay. XRD showed that anatase/rutile mixed-phase TiO2 thin films were predominantly in anatase and rutile that were 54.6 wt% and 41.9 wt%, respectively. Craters (2-5 µm) and protruding hills (10-50 µm) on Ti substrates were produced after electrochemical anodization with higher R a and R z surface roughness values. Anatase/rutile mixed-phase TiO2 thin films showed 26% photocatalytic decolorization toward RhB dye solution. The number of colonizing bacteria on anatase/rutile mixed-phase TiO2 thin films was decreased significantly in vitro. The photocatalyst was effective against A. actinomycetemcomitans colonization.
- Subjects :
- Aggregatibacter actinomycetemcomitans radiation effects
Anti-Bacterial Agents administration & dosage
Anti-Bacterial Agents chemical synthesis
Anti-Bacterial Agents radiation effects
Catalysis radiation effects
Cell Survival drug effects
Light
Nanocomposites radiation effects
Phase Transition
Titanium radiation effects
Aggregatibacter actinomycetemcomitans drug effects
Aggregatibacter actinomycetemcomitans physiology
Nanocomposites administration & dosage
Nanocomposites chemistry
Titanium administration & dosage
Titanium chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 2314-6141
- Volume :
- 2015
- Database :
- MEDLINE
- Journal :
- BioMed research international
- Publication Type :
- Academic Journal
- Accession number :
- 26576430
- Full Text :
- https://doi.org/10.1155/2015/705871