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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Nitzan, Yeshayahu Gedanken, Aharon Perkas, Nina Amirian, Galina Lipovsky, Anat |
| Copyright Year | 2013 |
| Abstract | Silver nanoparticles (NPs) were synthesized sonochemically by the reduction of silver ions with ethylene glycol and simultaneously deposited on different forms of TiO2 powders (commercial Degussa P-25, synthetic anatase and mesoporous titania). The Ag–TiO2 nanocomposites were characterized by X-ray electron diffraction (XRD), transmission electron microscopy (TEM), energy-dispersed X-ray analysis (EDX), UV absorption spectroscopy (UV), Z-potential measurements and electron paramagnetic resonance (EPR). The results demonstrated homogeneous distribution of silver nanoparticles ∼3 nm in size, strongly attached to the surface of titania. The antimicrobial properties of Ag–TiO2 were tested against a number of Gram-positive and Gram-negative bacteria. A high bactericidal effect was found in the absence of UV light. The reduction in bacterial viability was between 3 and 4.2 logs. Based on the experimental data it was concluded that enhanced antimicrobial activity of the Ag–TiO2 originated from both the oxidative stress generated by silver nanoparticles and the presence of silver ions on the surface of the silver–titania composite. |
| Starting Page | 5309 |
| Ending Page | 5316 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 2050750X |
| Volume Number | 1 |
| Issue Number | 39 |
| Journal | Journal of Materials Chemistry B |
| DOI | 10.1039/c2tb00337f |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Degussa EPR Ethylene glycol Evonik Industries Anatase Mesoporous material X-ray crystallography Electron diffraction Transmission electron microscopy Spectroscopy Electron paramagnetic resonance Antimicrobial Gram-positive bacteria Gram-negative bacteria Bactericide Oxidative stress |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Medicine Materials Science Biomedical Engineering |
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