Copper Surface Treatment Method with Antibacterial Performance Using "Super-Spread Wetting" Properties.
Beomdeok SeoHideyuki KanematsuMasashi NakamotoYoshitsugu MiyabayashiToshihiro TanakaPublished in: Materials (Basel, Switzerland) (2022)
In this work, a copper coating is developed on a carbon steel substrate by exploiting the superwetting properties of liquid copper. We characterize the surface morphology, chemical composition, roughness, wettability, ability to release a copper ion from surfaces, and antibacterial efficacy (against Escherichia coli and Staphylococcus aureus ). The coating shows a dense microstructure and good adhesion, with thicknesses of approximately 20-40 µm. X-ray diffraction (XRD) analysis reveals that the coated surface structure is composed of Cu, Cu 2 O, and CuO. The surface roughness and contact angle measurements suggest that the copper coating is rougher and more hydrophobic than the substrate. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) measurements reveal a dissolution of copper ions in chloride-containing environments. The antibacterial test shows that the copper coating achieves a 99.99% reduction of E. coli and S. aureus . This study suggests that the characteristics of the copper-coated surface, including the chemical composition, high surface roughness, good wettability, and ability for copper ion release, may result in surfaces with antibacterial properties.
Keyphrases
- oxide nanoparticles
- escherichia coli
- staphylococcus aureus
- high resolution
- biofilm formation
- magnetic resonance
- multiple sclerosis
- ionic liquid
- dna methylation
- magnetic resonance imaging
- computed tomography
- pseudomonas aeruginosa
- mass spectrometry
- cystic fibrosis
- multidrug resistant
- klebsiella pneumoniae
- electron microscopy