Cold Plasma Synthesis of Poly(ethylene glycol)-like Layers on Stainless-Steel Surfaces to Reduce Attachment and Biofilm Formation by Listeria monocytogenes |
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| Authors: | Y. WANG E. B. SOMERS S. MANOLACHE F. S. DENES A. C. L. WONG |
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| Affiliation: | Author Wang, Somers, Denes, and Wong are with the Dept. of Food Microbiology and Toxicology, Food Research Inst., Univ. of Wisconsin, 1925 Willow Drive, Madison, WI 53706. Authors Wang, Manolache, and Denes are with the Center for Plasma-Aided Manufacturing, Univ. of Wisconsin, 1410 Engineering Drive, Madison, Wis. Direct inquiries to author Wong (E-mail: ). |
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| Abstract: | ABSTRACT Poly(ethylene glycol) (PEG)-like structures were generated on stainless steel under di(ethylene glycol) vinyl ether (DiEGVE) radio frequency-plasma environments. Electron spectroscopy for chemical analysis and attenuated total reflectance Fourier transform infrared spectroscopy indicated a PEG-like deposition, which was stable to cleaning, sanitizing, and storage for up to 2 mo. Atomic force microscopy and water contact angle analysis indicated that the modified stainless-steel surfaces were less rough and more hydrophilic than the unmodified surfaces. Listeria monocytogenes attachment and biofilm formation on modified surfaces decreased more than 90% compared with the unmodified stainless steel ( P < 0.01). DiEGVE cold plasma was demonstrated to be a promising technique to reduce bacterial contamination on surfaces encountered in food-processing environments. |
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| Keywords: | poly(ethylene glycol) biofilm Listeria monocytogenes cold plasma |
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