Antibacterial Ag Cu coatings deposited using an asymmetric bipolar high-power impulse magnetron sputtering technique

Hsu, Yu-Hsuan; Wu, Wan-Yu

doi:10.1016/j.surfcoat.2019.02.001

Cited by 11 publications

(6 citation statements)

References 32 publications

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“…Addressing this point, a fully controllable bipolar HiPIMS plasma source has been recently developed in our group showing very promising results in terms of ions acceleration and film structure improvements [18]. Few recent studies on bipolar HiPIMS [18][19][20][21][22] (2016-2018) utilizing a (long) second positive pulse applied to the cathode after a classical negative HiPIMS pulse (see figure 1(c)) should be mentioned in this regard as well.…”

Section: Introductionmentioning

confidence: 99%

A poly-diagnostic study of bipolar high-power magnetron sputtering: role of electrical parameters

Michiels¹,

Snyders²,

Britun³

2020

J. Phys. D: Appl. Phys.

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Ion acceleration in a bipolar high-power impulse magnetron sputtering discharge working with Ar gas and using a Ti cathode has been investigated. The multiple discharge diagnostic approaches have been implemented, including the target and substrate current probe measurements, mass spectrometry and laser-induced fluorescence. In particular, the current waveforms were analysed in detail, showing the particularities of the current evolution during the negative (plasma) and positive voltage pulses. It is shown that the substrate current during the positive voltage pulse reveals two peaks, corresponding, as suggested, to two groups of the positive ions repulsed from the cathode by the applied positive potential. These observations correlate well with the mass spectrometry measurements as well as with the two-dimensional ion density mapping performed for several discharge conditions by laser-induced fluorescence imaging technique.

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Section: Introductionmentioning

confidence: 99%

A poly-diagnostic study of bipolar high-power magnetron sputtering: role of electrical parameters

Michiels¹,

Snyders²,

Britun³

2020

J. Phys. D: Appl. Phys.

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“…Furthermore, the high-power impulse magnetron-sputtering bimetallic Ag/Cu coatings presented higher activity against Escherichia coli and Psuedomonas aeruginosa than the Ag coating alone. The Ag/Cu coatings deposited at 80, 120, and 160 A, giving Cu/Ag composition ratios of 1.7 to 3.6, showed better inactivation of E. coli , whereas those with a lower Cu/Ag ratio gave better inactivation of P. aeruginosa [ 19 ]. These findings support the results of the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Copper has been deposited on a thallium surface using magnetron sputtering. Ti6Al4V disks were coated with Ag, Cu, and Ag-Cu thin films using high-power impulse magnetron-sputtering in order to obtain antibacterial properties [ 19 ]. The Ag-Cu coatings were the most efficient in achieving the inactivation of Escherichia coli and Pseudomonas aeruginosa .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Antibacterial Metal Surfaces Using Magnetron-Sputtering Method

et al. 2021

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One-hundred-nanometer films consisting of silver, copper, and gold nanocrystallites were prepared, and their antibacterial properties were quantitatively measured. The magnetron-sputtering method was used for the preparation of the metallic films over the glass plate. Single- and double-layer films were manufactured. The films were thoroughly characterized with the XRD, SEM, EDS, and XPS methods. The antibacterial activity of the samples was investigated. Gram-negative Escherichia coli, strain K12 ATCC 25922 (E. coli), and Gram-positive Staphylococcus epidermidis, ATCC 49461 (S. epidermidis), were used in the microbial tests. The crystallite size was about 30 nm in the cases of silver and gold and a few nanometers in the case of copper. Significant oxidation of the copper films was proven. The antibacterial efficacy of the tested samples followed the order: Ag/Cu > Au/Cu > Cu. It was concluded that such metallic surfaces may be applied as contact-killing materials for a more effective fight against bacteria and viruses.

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“…Coatings can be accomplished by selecting polyelectrolytes and controlled conditions for the deposition. Multilayers can be deposited on the surface for coating with carefully controlled adhesive properties according to the targeted viruses (Hsu and Wu, 2019). The results obtained from MS2-type bacteriophage (MS2) adhesion using quartz crystal microbalance with the degeneracy monitoring were compared with the predictions by the (XDLVO) Derjaguin-Landau-Verwey-Overbeek theory.…”

Section: Virucidal Compositions For Solid Surfacesmentioning

confidence: 99%

Nano-antivirals: A comprehensive review

Hussain

Abro

Ahmed

et al. 2022

Front. Nanotechnol.

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Nanoparticles can be used as inhibitory agents against various microorganisms, including bacteria, algae, archaea, fungi, and a huge class of viruses. The mechanism of action includes inhibiting the function of the cell membrane/stopping the synthesis of the cell membrane, disturbing the transduction of energy, producing toxic reactive oxygen species (ROS), and inhibiting or reducing RNA and DNA production. Various nanomaterials, including different metallic, silicon, and carbon-based nanomaterials and nanoarchitectures, have been successfully used against different viruses. Recent research strongly agrees that these nanoarchitecture-based virucidal materials (nano-antivirals) have shown activity in the solid state. Therefore, they are very useful in the development of several products, such as fabric and high-touch surfaces. This review thoroughly and critically identifies recently developed nano-antivirals and their products, nano-antiviral deposition methods on various substrates, and possible mechanisms of action. By considering the commercial viability of nano-antivirals, recommendations are made to develop scalable and sustainable nano-antiviral products with contact-killing properties.

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Antibacterial Ag Cu coatings deposited using an asymmetric bipolar high-power impulse magnetron sputtering technique

Cited by 11 publications

References 32 publications

A poly-diagnostic study of bipolar high-power magnetron sputtering: role of electrical parameters

A poly-diagnostic study of bipolar high-power magnetron sputtering: role of electrical parameters

Fabrication of Antibacterial Metal Surfaces Using Magnetron-Sputtering Method

Nano-antivirals: A comprehensive review

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