Sterilization Performance of Ultraviolet Emission from Laser Plasmas

K. Murai; Yasushi Miyano; K. Hirotani; Masahiro Tsukamoto; Yoshio Kikuchi

doi:10.4028/www.scientific.net/SSP.107.99

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HomeSolid State PhenomenaSolid State Phenomena Vol. 107Sterilization Performance of Ultraviolet Emission...

Sterilization Performance of Ultraviolet Emission from Laser Plasmas

Abstract:

A pulsed YAG laser beam was focused with a lens in order to produce laser plasmas by laser-induced gas breakdown inside the gas cell. The most intense UV emissions between 200 and 300 nm in wavelength was generated by the Xe gas breakdown. UV emission from laser plasma by Xe gas breakdown showed the best sterilization performance compared with those by other gas breakdown.

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Periodical:

Solid State Phenomena (Volume 107)

Pages:

99-102

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.107.99

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Online since:

October 2005

Authors:

K. Murai, Yasushi Miyano, K. Hirotani, Masahiro Tsukamoto, Yoshio Kikuchi

Keywords:

Laser Plasma, Laser-Induced Gas Breakdown, Mercury Lamp, UV Sterilization

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References

[1] R.G. Meyerand, Jr. and A.F. Haught, Phys. Rev. Lett. Vol. 11 (1963), p.401.

Google Scholar

[2] C.V. Bindhu, S.S. Harilal, M.S. Tillack, F. Najmbadi, and A.C. Gaeris, Applied Spectroscopy Vol.

Google Scholar

[58] (2004), p.719.

Google Scholar

[3] S. Hurry, D.R. Vidal, F. Desor, J. Pelletier, T. Lagarde, Lett. Appl. Microbiol. Vol. 26 (1998) , p.417. 200 250 300 350 400.

Google Scholar

500 1000 1500 2000 2500.

Google Scholar

[20] [40] [60] [80] 100 Sterilization Wavelength Region Hg Air Ar Kr Xe Transmission [%] Intensity Wavelength [nm] Fig. 3 UV spectra from various gas media with YAG laser (100 mJ/ 532 nm/ 7 ns) with the transmission of the quartz window.

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[10] [1] [10] [2] [10] [3] [10] [4] [10] [5] [10] [6] 0 20 40 60 80 100 120 Xe Ar Air Total Viable Count [cell/ml] Exposure Time [min] 99% sterilization Fig. 4 Sterilization performance of laser plasmas on E coli with various gas media as a function of exposure time.

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