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20 Apr 2009

Volume 94, Issue 16, Articles (16xxxx)

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Appl. Phys. Lett. 94, 161105 (2009); http://dx.doi.org/10.1063/1.3119666 (3 pages)

Artur R. Davoyan, Ilya V. Shadrivov, Andrey A. Sukhorukov, and Yuri S. Kivshar
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Disinfection of E. coli by nonthermal microplasma electrolysis in normal saline solution

Yukinori Sakiyama, Takaaki Tomai, Masaru Miyano, and David B. Graves

Appl. Phys. Lett. 94, 161501 (2009); http://dx.doi.org/10.1063/1.3122148 (3 pages) | Cited 23 times

Online Publication Date: 20 April 2009

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We present a unique method to inactivate microorganisms in 0.9% NaCl solution (normal saline solution) by means of microplasmas. The device consists of a thin titanium wire covered by a glass tube for insulation except the tip and a ground electrode. Application of an asymmetric high-frequency, high voltage results in the formation of microbubbles at both electrodes. Repetitive light emission is observed in the vicinity of the powered electrode. We employed E. coli bacteria to investigate the disinfection efficiency of the device. More than 99.5% of E. coli were deactivated in 180 s. The survival curve showed biphasic behavior.
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87.80.Kc Electrochemical techniques
82.80.-d Chemical analysis and related physical methods of analysis
82.45.Hk Electrolysis
82.45.Fk Electrodes
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