Bactericidal activity of titanium dioxide ultraviolet-induced films
| Autor: | I.S. Golubeva, S. N. Pleskova, Yu K Verevkin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Staphylococcus aureus
Materials science Ultraviolet Rays Bioengineering 02 engineering and technology 010402 general chemistry medicine.disease_cause Photochemistry 01 natural sciences Bacterial cell structure Microbiology Biomaterials Nanopores chemistry.chemical_compound Escherichia coli medicine Ultraviolet light Irradiation Titanium chemistry.chemical_classification Reactive oxygen species 021001 nanoscience & nanotechnology Anti-Bacterial Agents 0104 chemical sciences chemistry Mechanics of Materials Titanium dioxide 0210 nano-technology Antibacterial activity Ultraviolet |
| Zdroj: | Materials Science and Engineering: C. 59:807-817 |
| ISSN: | 0928-4931 |
| DOI: | 10.1016/j.msec.2015.10.021 |
| Popis: | TiO2 films are used as a self-sterilization surface due to their property to form reactive oxygen species (ROS) when irradiated with ultraviolet light. These ROS attack bacteria and kill them. We present a new way to enhance the bactericidal activity of TiO2-films: formation of nanopores on the surface by four-beam high-power laser irradiation. Such surfaces have significantly higher antibacterial activity as compared to conventional TiO2 surfaces after 15 and 60min of UV irradiation. Study of the bacterial cell morphology by atomic force microscopy after 60min irradiation showed that Staphylococcus aureus 956 and Escherichia coli 321-5 undergo significant morphological changes. S. aureus assume atypical elongated shapes after UV treatment alone and swollen forms with protrusions after UV treatment on TiO2 surface. E. coli exhibit oval or round forms after UV treatment alone, and round forms with small protrusions, and destroyed cells after incubation under UV on the TiO2 film. |
| Databáze: | OpenAIRE |
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