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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Woo, Kyoungja Joe, Yun Haeng Ko, Young-Seon Seo, Mihwa Hwang, Jungho Lim, Kipil |
| Copyright Year | 2014 |
| Abstract | There is a significant need for materials that promptly exhibit antimicrobial activity upon contact. The large-scale fabrication of monodisperse silver nanoparticle (AgNP)-decorated silica (AgNP@SiO2) hybrid particles, and their prompt and synergistic antibacterial activity against both the Gram-negative bacteria Escherichia coli and the Gram-positive bacteria Staphylococcus epidermidis on air filtration units are presented. Monodisperse aminopropyl-functionalized silica colloids (406 nm) were used as a support material and were hybridized with AgNPs using a seeding, sorting-out, and growing strategy with Ag seeds (1–2 nm) into ∼30 nm AgNPs, successfully yielding 51 g of AgNP@SiO2 hybrid particles. Medium filter samples (glass fiber material, 4 × 4 cm2) were coated with AgNP@SiO2 particles and tested for antibacterial efficacy. SEM characterization of the bacterial morphology suggested prompt and synergistic antibacterial activity against both classes of bacteria. Moreover, antibacterial efficacies >99.99% for both bacteria were obtained using a filter sample with a coating areal density of 1 × 108 particles per cm2. Solutions of AgNP@SiO2 at 1.3% were stable even after 8 months. The hybrid particle AgNP@SiO2 and the air filter system coated with the particles are expected to be useful for future green environment applications. |
| Starting Page | 6714 |
| Ending Page | 6722 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 2050750X |
| Volume Number | 2 |
| Issue Number | 39 |
| Journal | Journal of Materials Chemistry B |
| DOI | 10.1039/c4tb01068j |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Subscribed |
| Subject Keyword | Escherichia coli Antimicrobial Dispersity Silver nanoparticle Silicon dioxide Gram-negative bacteria Gram-positive bacteria Bacteria Staphylococcus epidermidis Glass fiber Area density |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Medicine Materials Science Biomedical Engineering |
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