| Autor: |
Jeong, Sang Bin, Heo, Ki Joon, Yoo, Jae Hyun, Kang, Dong-Gi, Santoni, Leonardo, Knapp, Caroline E., Kafizas, Andreas, Carmalt, Claire J., Parkin, Ivan P., Shin, Jae Hak, Hwang, Gi Byoung, Jung, Jae Hee |
| Zdroj: |
Nano Letters; July 2024, Vol. 24 Issue: 30 p9155-9162, 8p |
| Abstrakt: |
Herein, we introduce a photobiocidal surface activated by white light. The photobiocidal surface was produced through thermocompressing a mixture of titanium dioxide (TiO2), ultra-high-molecular-weight polyethylene (UHMWPE), and reduced graphene oxide (rGO) powders. A photobiocidal activity was not observed on UHMWPE-TiO2. However, UHMWPE-TiO2@rGO exhibited potent photobiocidal activity (>3-log reduction) against Staphylococcus epidermidisand Escherichia colibacteria after a 12 h exposure to white light. The activity was even more potent against the phage phi 6 virus, a SARS-CoV-2 surrogate, with a >5-log reduction after 6 h exposure to white light. Our mechanistic studies showed that the UHMWPE-TiO2@rGO was activated only by UV light, which accounts for 0.31% of the light emitted by the white LED lamp, producing reactive oxygen species that are lethal to microbes. This indicates that adding rGO to UHMWPE-TiO2triggered intense photobiocidal activity even at shallow UV flux levels. |
| Databáze: |
Supplemental Index |
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