Journal article
Microsecond-Pulsed Dielectric Barrier Discharge Plasma-Treated Mist for Inactivation of Escherichia coli In Vitro
IEEE transactions on plasma science, v 47(1), pp 395-402
Jan 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this paper, we demonstrate a plasma misting system capable of inactivating Escherichia coli O157:H7 ( E.coli ) in a 4 ft 3 (approximately 100 L) volume with potential for future use in decontaminating fresh produce. Water droplets, with an average diameter of 5~\mu \text{m} , are generated via ultrasonic nebulizers and carried by compressed air. These micrometer-sized droplets flowthrough a set of three cylindrical, microsecond-pulsed dielectric barrier discharges (DBDs). We observe the Coulombic fission of droplets up to a critical radius into submicrometer droplets (Sauter mean of approximately 0.3 \mu \text{m} ), measured by a laser diffraction analyzer. E.coli , on agar plates, is inactivated by this mist in a time and flowrate-dependent manner. We hypothesize that the observed antimicrobial effect correlates with the concentration of submicrometer droplets. The observed formation of submicrometer droplets from this volumetric DBD is similar to the bursting of droplets observed with electrospray devices using corona discharges.
Metrics
Details
- Title
- Microsecond-Pulsed Dielectric Barrier Discharge Plasma-Treated Mist for Inactivation of Escherichia coli In Vitro
- Creators
- Pietro Ranieri - Nyheim Plasma Institute, Drexel University, Camden, NJ, USAGerard McGovern - Drexel UniversityHenry Tse - Drexel UniversityAlexander Fulmer - Drexel UniversityMykola Kovalenko - Nyheim Plasma Institute, Drexel University, Camden, NJ, USAGary Nirenberg - Drexel UniversityVandana Miller - Nyheim Plasma Institute, Drexel University, Camden, NJ, USAAlexander Rabinovich - Drexel UniversityAlexander Fridman - Drexel UniversityGregory Fridman - Nyheim Plasma Institute, Drexel University, Camden, NJ, USA
- Publication Details
- IEEE transactions on plasma science, v 47(1), pp 395-402
- Publisher
- IEEE
- Grant note
- 2015-68003-23411 / National Institute of Food and Agriculture (10.13039/100005825)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Microbiology and Immunology; C. and J. Nyheim Plasma Institute; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000455455900039
- Scopus ID
- 2-s2.0-85056696848
- Other Identifier
- 991019168179704721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Physics, Fluids & Plasmas