Surface plasmon resonance-enabled antibacterial digital versatile discs
We report the achievement of effective sterilization of exemplary bacteria including Escherichia coli and Geobacillus stearothermophilus spores on a digital versatile disc (DVD). The spiral arrangement of aluminum-covered pits generates strong surface plasmon resonance (SPR) absorption of near-infra...
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Veröffentlicht in: | Applied physics letters 2012-02, Vol.100 (6), p.063702-063702-4 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We report the achievement of effective sterilization of exemplary bacteria including
Escherichia coli
and
Geobacillus stearothermophilus
spores on a digital versatile disc (DVD). The spiral arrangement of aluminum-covered pits generates strong surface plasmon resonance (SPR) absorption of near-infrared light, leading to high surface temperature that could even damage the DVD plastics. Localized protein denaturation and high sterilization efficiency have been demonstrated by using a fluorescence microscope and cell cultures. Numerical simulations have also been conducted to model the SPR properties and the surface temperature distribution of DVDs under laser illumination. The theoretical predictions agree reasonably well with the experimental results. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.3685460 |