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Materials 2016, 9(4), 274; doi:10.3390/ma9040274

Deposition of Antimicrobial Copper-Rich Coatings on Polymers by Atmospheric Pressure Jet Plasmas

Leibniz Institute for Plasma Science and Technology (INP Greifswald e.V.), Felix-Hausdorff-Str. 2, Greifswald 17489, Germany
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Academic Editor: Fernão D. Magalhães
Received: 10 February 2016 / Revised: 22 March 2016 / Accepted: 28 March 2016 / Published: 7 April 2016
(This article belongs to the Special Issue Self-Cleaning and Antimicrobial Surfaces)
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Abstract

Inanimate surfaces serve as a permanent reservoir for infectious microorganisms, which is a growing problem in areas in everyday life. Coating of surfaces with inorganic antimicrobials, such as copper, can contribute to reduce the adherence and growth of microorganisms. The use of a DC operated air plasma jet for the deposition of copper thin films on acrylonitrile butadiene styrene (ABS) substrates is reported. ABS is a widespread material used in consumer applications, including hospitals. The influence of gas flow rate and input current on thin film characteristics and its bactericidal effect have been studied. Results from X-ray photoelectron spectroscopy (XPS) and atomic force microscopy confirmed the presence of thin copper layers on plasma-exposed ABS and the formation of copper particles with a size in the range from 20 to 100 nm, respectively. The bactericidal properties of the copper-coated surfaces were tested against Staphylococcus aureus. A reduction in growth by 93% compared with the attachment of bacteria on untreated samples was observed for coverage of the surface with 7 at. % copper. View Full-Text
Keywords: cold atmospheric pressure plasma; DC plasma jet; polymer; antimicrobial activity; cooper; Staphylococcus aureus; acrylonitrile butadiene styrene cold atmospheric pressure plasma; DC plasma jet; polymer; antimicrobial activity; cooper; Staphylococcus aureus; acrylonitrile butadiene styrene
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kredl, J.; Kolb, J.F.; Schnabel, U.; Polak, M.; Weltmann, K.-D.; Fricke, K. Deposition of Antimicrobial Copper-Rich Coatings on Polymers by Atmospheric Pressure Jet Plasmas. Materials 2016, 9, 274.

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