Fabrication of antibacterial nanopillar surface on AISI 316 stainless steel through argon plasma etching with direct current discharge

Hirano, Mitsuhiro; Hashimoto, Minoru; Miura, Koyo; Ohtsu, Naofumi

doi:10.1016/j.surfcoat.2020.126680

Cited by 23 publications

(19 citation statements)

References 46 publications

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“…The Fe 2p 3/2 spectrum was deconvoluted into three peaks corresponding to metallic Fe (706.9 eV), Fe 2 O 3 (710.5 eV), and FeOOH (711.9 eV). 18,27,28) The binding energy of the main peak in the Cr 2p 3/2 spectra was shifted toward the negative direction with the introduction of N 2 gas, of which the width was broader than that of 0%N 2 (Fig. 3(b)).…”

Section: Effect Of Gas Composition On Chemical State Of Nanotextured ...mentioning

confidence: 94%

“…The Cr 2p 3/2 spectrum consisted of three peaks, corresponding to CrN (575.4 eV), Cr 2 O 3 (576.4 eV), and Cr(OH) 3 (577.9 eV). 18,28,29) The chemical state of Cr was mainly oxide on the 0%N 2 surface, whereas that of nitride and oxide on the 1%5%N 2 surfaces. The Mo 3d 5/2 spectra were distinctly confirmed from the 1%5%N 2 surface, which were deconvoluted into three peaks attributed to Mo 2 N (229.0 eV), MoO 2 (230.0 eV), and MoO 3 (231.9 eV).…”

Section: Effect Of Gas Composition On Chemical State Of Nanotextured ...mentioning

confidence: 99%

“…19) We also previously reported that directcurrent (DC) discharged Ar plasma etching with shortened process duration formed nanoprotrusions with a size below 200 nm on AISI 316 stainless steel (316SS) surfaces. 18) However, the nanoprotrusions fabricated under such mild conditions are distributed sparsely on the surface. Such fabrication condition is beneficial for the formation of tiny precipitates due to a decrease in the substrate temperature elevation, though it prevents the dense arrangement of precipitates.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Nanoprotrusion Surface on AISI 316 Stainless Steel via Ar–N<sub>2</sub> Plasma Etching

2022

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Argon (Ar) plasma etching of stainless steel is known to form a unique surface texture consisting of nanopillars of several hundred nanometers due to the use of carbide precipitates as a template. The present study demonstrates that adding a small amount of nitrogen (N 2 ) gas to Ar plasma discharge gas reduces the pillar size and enhances the pillar density, thereby resulting in a densely arranged nanoprotrusion surface. Admixing 1% N 2 to the discharge gas decreased the height of each nanopillar to approximately a quarter of its original height. A further increase in N 2 gas hardly changed the size of the nanoprotrusions, yet its number density increased up to 5% N 2 addition. Admixed N 2 gas generates N 2 + species in the plasma, which form tiny chromium nitride (CrN) precipitates on a stainless steel surface. These CrN precipitates have become an alternative template for plasma etching. Nanoprotrusion surfaces are expected to improve the tribological properties of stainless steel surfaces; thus, the introduced process has potential for industrial applications.

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Section: Effect Of Gas Composition On Chemical State Of Nanotextured ...mentioning

confidence: 94%

Section: Effect Of Gas Composition On Chemical State Of Nanotextured ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Nanoprotrusion Surface on AISI 316 Stainless Steel via Ar–N<sub>2</sub> Plasma Etching

2022

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“…In the past, several studies have applied plasma etching to fabricate nanostructured bactericidal surfaces. For example, Ar plasma etching was used for fabricating nanopillar structures on stainless steel surfaces [38]. The fabricated nanopillar surfaces exhibited excellent antibacterial effects for both Gram-positive (Staphylococcus epidermidis) and Gram-negative (Escherichia coli) bacteria.…”

Section: Contact-killing Surfacesmentioning

confidence: 99%

Plasma for biomedical decontamination: from plasma-engineered to plasma-active antimicrobial surfaces

Nikiforov

Morent

et al. 2022

Current Opinion in Chemical Engineering

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Modern society is suffering from many infectious microbes. Developing antimicrobial surfaces for biomedical decontamination and sterilization is one of the strategic solutions to mitigate the spread of infectious pathogens. Here, we outline the paradigm of plasmas for biomedical decontamination by presenting approaches of plasmaengineered antimicrobial surfaces and novel plasma-active antimicrobial surfaces. Low-temperature plasma can not only be used as a material fabrication tool for antimicrobial surface engineering but also be used directly for microbial inactivation by specially designed plasma-active surfaces that can effectively destroy microorganisms through exposure to plasma. The role of plasmas in the two different kinds of antimicrobial surfaces is discussed along with their associated advantages and disadvantages. Future research directions, challenges, and opportunities in both plasma-based antimicrobial surfaces are also critically evaluated. This analysis contributes to the development of next-generation antimicrobial surfaces for future bio-safety.

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“…Antibacterial surfaces can be obtained with antifouling strategy (antibacterial adhesion), bactericidal strategy (bacterial killing), or their combination. − Bionic subbacterial nanostructures mimicking the dragonfly wings, lotus leaf, and shark skin present inspiring antibacterial capacity because of the reduced contact area between the bacteria and the material surfaces. − Unfortunately, the infection may occur on these nanostructured surfaces due to the limited antibacterial efficiency . Moreover, the high cost and time-consuming fabrication process (e.g., nanoimprint lithography or plasma etching) further impede their wide clinical application. − Recently, metal ions such as silver (Ag), copper (Cu), and nickel (Ni) ions have been applied to modify the medical implant surfaces to inhibit bacterial colonization. − These metal ions could kill bacteria by generating reactive oxygen species (ROS) through Fenton reactions or disrupting bacterial membranes by binding with the sulfhydryl groups of the bacterial membranes. , Meanwhile, the AgNO 3 can be used to deposit Ag nanoparticles on the material surfaces . However, a high concentration of antibacterial ions can also disrupt the cell membrane, resulting in detrimental cytotoxic effects. , That is, to improve the therapeutic efficacy of medical devices, antibacterial and biocompatible surfaces are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Structure-Element Surface Modification Strategy Enhances the Antibacterial Performance of Zr-BMGs

Yang

Zheng

et al. 2022

ACS Appl. Mater. Interfaces

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Zirconium-based metallic glasses (Zr-BMGs) have attracted tremendous attention in healthcare fields, especially in the design of surgical tools and orthopedic implants, due to their unique amorphous structure; however, the application of Zr-BMG-based medical devices is hindered by bacterial contamination. Here, a structure-element strategy is proposed to improve the antibacterial performance of Zr-BMGs by surface laser nanostructuring and silver nanoparticle (AgNP) deposition. The laser nanostructuring process generates a disordered nanoparticle structure (NP) and laser-induced periodic surface structure (LIPSS) to decrease the surface bacterial adhesion and increase the internal antimicrobial ion release. Moreover, after Ag deposition and hydrogen peroxide (H2O2) treatment, the antibacterial adhesion ability of the Zr-BMG surface can be further improved without any influence on the crystallization of Zr-BMGs and the release of antibacterial copper/nickel (Cu/Ni). The antibacterial effect of the LIPSS and the NP surfaces presents over 90% bacterial killing ratio, which is superior to that of the naked Zr-BMGs with less than 60% bacterial killing ratio. In vitro and in vivo tests show that the Ag-deposited and H2O2-treated LIPSS surfaces exhibit an optimal balance between the antibacterial property and the biocompatibility compared with the polished, NP structured or LIPSS structured surfaces. It is assumed that such structure-element surface modification strategy can improve the antibacterial activity of metal-containing surgical tools and orthopedic implants, improving the success rate of medical treatment.

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Fabrication of antibacterial nanopillar surface on AISI 316 stainless steel through argon plasma etching with direct current discharge

Cited by 23 publications

References 46 publications

Fabrication of Nanoprotrusion Surface on AISI 316 Stainless Steel via Ar–N<sub>2</sub> Plasma Etching

Fabrication of Nanoprotrusion Surface on AISI 316 Stainless Steel via Ar–N<sub>2</sub> Plasma Etching

Plasma for biomedical decontamination: from plasma-engineered to plasma-active antimicrobial surfaces

Structure-Element Surface Modification Strategy Enhances the Antibacterial Performance of Zr-BMGs

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