Beamed UV sonoluminescence by aspherical air bubble collapse near liquid-metal microparticles
| Autor: | Bradley Boyd, Andrew D. Greentree, Ivan S. Maksymov, Sergey A. Suslov, Sid Becker |
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| Rok vydání: | 2020 |
| Předmět: |
Liquid metal
Materials science Bubble Biophysics FOS: Physical sciences lcsh:Medicine 02 engineering and technology Condensed Matter - Soft Condensed Matter 01 natural sciences Fluence Molecular physics Article 010305 fluids & plasmas Physics::Fluid Dynamics Sonoluminescence 0103 physical sciences Ultraviolet light Light beam Physics - Biological Physics Irradiation lcsh:Science Plasmon Nanophotonics and plasmonics Multidisciplinary lcsh:R Fluid Dynamics (physics.flu-dyn) Physics - Fluid Dynamics 021001 nanoscience & nanotechnology Biological Physics (physics.bio-ph) Soft Condensed Matter (cond-mat.soft) lcsh:Q 0210 nano-technology Optics (physics.optics) Physics - Optics |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-020-58185-2 |
| Popis: | Irradiation with UV-C band ultraviolet light is one of the most commonly used ways of disinfecting water contaminated by pathogens such as bacteria and viruses. Sonoluminescence, the emission of light from acoustically-induced collapse of air bubbles in water, is an efficient means of generating UV-C light. However, because a spherical bubble collapsing in the bulk of water creates isotropic radiation, the generated UV-C light fluence is insufficient for disinfection. Here, we show that we can create a UV light beam from aspherical air bubble collapse near a gallium-based liquid-metal microparticle. The beam is perpendicular to the metal surface and is caused by the interaction of sonoluminescence light with UV plasmon modes of the metal. We calculate that such beams can generate fluences exceeding $10$ mJ/cm$^2$, which is sufficient to irreversibly inactivate most common pathogens in water with the turbidity of more than $5$ Nephelometric Turbidity Units. 4 pages |
| Databáze: | OpenAIRE |
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