Abstract
Non-thermal atmospheric-pressure biocompatible plasma (NBP) has diverse functions such as surface treatment, and cleaning and decomposing organic matter. Few commercially available devices use plasma to sterilize and disinfect the air and surfaces. We commercialize a new plasma sterilizer that can eradicate viruses, bacteria, etc., using NBP with a compact setup. The hydroxyl (OH) radical species concentration inside the dielectric-barrier discharge (DBD) is estimated from the equation reduced by R. Sankaranarayanan, which is approximately 9.78 × 1015 cm−3. The new plasma sterilizer with water droplets developed in this work exhibits excellent sterilization properties, with the OH radical concentration being approximately 30 times higher than that obtained in other types of atmospheric-pressure DBD devices in air saturated with vapor.
Highlights
Non-thermal plasma technology is essential for the production of semiconductors, displays, electrical components, and biology, and has contributed greatly to modern industrial development
Sterilization is possible because the reactive oxygen species (ROS) and reactive nitrogen species (RNS) generated by Non-thermal atmospheric-pressure biocompatible plasma (NBP) can merge into the cell surface of bacteriaand destroy the cell surface and their DNA
Sankaranarayanan et al The new plasma sterilizer based on surface-discharged dielectric-barrier discharge (DBD) plasma with water droplets exhibited excellent sterilization properties as it has approximately 30 times higher OH radical concentration than that obtained in facing-DBD plasma with air at atmospheric pressure saturated with water vapor
Summary
Non-thermal plasma technology is essential for the production of semiconductors, displays, electrical components, and biology, and has contributed greatly to modern industrial development. Non-thermal plasma generated at atmospheric pressure has the advantages of no vacuum process, low cost, and simplicity. Non-thermal atmospheric-pressure biocompatible plasma (NBP) has diverse functions such as sterilization, surface treatment, and decomposing organic matter. There are few commercially available devices using plasma for sterilizing and disinfecting air and surfaces from viruses and bacteria. We have commercialized a new plasma sterilizer capable of eradicating bacteria by using the NBP dielectric-barrier discharge (DBD) method, which has been developed by the industry–academic cooperation between the Plasma Bioscience Research Center (PBRC) at Kwangwoon University and Dawoo Korea. The new plasma sterilizer has excellent properties in comparison with the conventional method used for the sterilization of viruses and bacteria. The conventional method utilizes chemical materials, such as alcohols, aldehydes, and cresols, for sterilization.
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