Back to Search
Start Over
Photocatalytical Antibacterial Activity of Mixed-Phase TiO2 Nanocomposite Thin Films against Aggregatibacter actinomycetemcomitans.
- Source :
- BioMed Research International; 10/21/2015, Vol. 2015, p1-10, 10p
- Publication Year :
- 2015
-
Abstract
- Mixed-phase TiO<subscript>2</subscript> 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 Rα and R<subscript>z</subscript> were calculated. The photocatalytic activity of the resulting TiO<subscript>2</subscript> 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 TiO<subscript>2</subscript> 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<subscript>α</subscript> and R<subscript>z</subscript> surface roughness values. Anatase/rutile mixed-phase TiO<subscript>2</subscript> thin films showed 26% photocatalytic decolorization toward RhB dye solution. The number of colonizing bacteria on anatase/rutile mixed-phase TiO<subscript>2</subscript> thin films was decreased significantly in vitro. The photocatalyst was effective against A. actinomycetemcomitans colonization. [ABSTRACT FROM AUTHOR]
- Subjects :
- BIOCHEMISTRY
BIOFILMS
PHYSICAL & theoretical chemistry
DYES & dyeing
ELECTROCHEMICAL analysis
HOST-bacteria relationships
DENTAL implants
INTERFEROMETRY
PHENOMENOLOGY
NANOPARTICLES
OPTICS
SCANNING electron microscopy
SCATTERING (Physics)
TITANIUM
X-rays
GRAM-negative anaerobic bacteria
IN vitro studies
COLONY-forming units assay
Subjects
Details
- Language :
- English
- ISSN :
- 23146133
- Volume :
- 2015
- Database :
- Complementary Index
- Journal :
- BioMed Research International
- Publication Type :
- Academic Journal
- Accession number :
- 128635471
- Full Text :
- https://doi.org/10.1155/2015/705871