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6 March 2020 Laser-induced cavitation for sterilization of foodborne pathogenic bacteria
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Abstract

A laser-induced cavitation-based sterilization technique was demonstrated to efficiently inactivate foodborne pathogenic bacteria with a low loss of nutrients. A sterilization efficiency of more than 90% (less than 5  ×  105  colony-forming unit  /  mL) was achieved when the flow rate was no more than 40  μL  /  s on a chip that could mimic an industrial sterilization system. In addition, the sterilization efficiency could be enhanced if the channels of the chip were coated with Ta2O5  /  SiO2 film. Moreover, the nutrient composition of the milk was well preserved. The laser-induced cavitation-based sterilization technique provides an alternative method for the inactivation of foodborne pathogenic bacteria.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Lulu Zheng, Wei Li, Mantong Zhao, Yule Zhang, Ruijin Hong, Bo Dai, Lisset Hermida, Ricardo Silva, Dawei Zhang, and Songlin Zhuang "Laser-induced cavitation for sterilization of foodborne pathogenic bacteria," Optical Engineering 59(3), 036103 (6 March 2020). https://doi.org/10.1117/1.OE.59.3.036103
Received: 24 December 2019; Accepted: 18 February 2020; Published: 6 March 2020
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