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Kinetically Deposited Copper Antimicrobial Surfaces

1
Army Research Laboratory, Aberdeen Proving Ground, MD 21005-5201, USA
2
Worcester Polytechnic Institute, Worcester, MA 01609, USA
3
Survice Engineering, Aberdeen, MD 21017, USA
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(4), 257; https://doi.org/10.3390/coatings9040257
Received: 13 February 2019 / Revised: 10 April 2019 / Accepted: 11 April 2019 / Published: 17 April 2019
(This article belongs to the Special Issue Cold Spraying: Recent Trends and Future Views)
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Abstract

Bacterial and viral contamination of contact surfaces increases the risk of infection. A great deal of work has been done on the capabilities of copper and its alloys to protect against a variety of microorganisms endangering public health, particularly in healthcare and food processing applications. This work has conclusively shown the effectiveness of copper for touch surface disinfection; however, the optimum microstructural characteristics of the copper surface have not been established. The sterilization effectiveness of three kinetically sprayed copper surfaces and two copper feedstocks were examined. The surfaces were inoculated with methicillin-resistant Staphylococcus aureus (MRSA) and influenza A virus. After a two-hour exposure to the surfaces, the surviving microorganisms were assayed, and the results contrasted. These tests showed substantial antimicrobial differences between the coatings generated by the spray techniques and those obtained by different feedstock powders. The significance of the copper spray application was demonstrated, and the application-dependent mechanism for antimicrobial effectiveness was explained. View Full-Text
Keywords: antimicrobial; surface; copper; powder; spray antimicrobial; surface; copper; powder; spray
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Champagne, V.; Sundberg, K.; Helfritch, D. Kinetically Deposited Copper Antimicrobial Surfaces. Coatings 2019, 9, 257.

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