Effects of silver segregation on sputter deposited antibacterial silver-containing diamond-like carbon films

Wang, L.J.; Zhang, F.; Fong, Anthony Y.; Lai, Kalyn; Shum, P.W.; Zhou, Zhifeng; Gao, Zhendong; Fu, Tao

doi:10.1016/j.tsf.2018.02.015

Cited by 37 publications

(35 citation statements)

References 39 publications

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“…This observation is sustained more clearly with AFM research. Silver segregation from the carbon matrix to film surface is also confirmed by data in the literature data [20].…”

Section: Electrochemical Stabilitysupporting

confidence: 75%

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Investigation of High Voltage Anodic Plasma (HVAP) Ag-DLC Coatings on Ti50Zr with Different Ag Amounts

et al. 2019

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The paper presents the investigation of a series of silver-incorporated diamond-like carbon (Ag-DLC) coatings with increasing Ag content on Ti50Zr and deposited using high voltage anodic plasma (HVAP). The coatings surface properties were analyzed with scanning electron microscope (SEM), atomic force microscope (AFM), and contact angle determinations. Electrochemical tests were performed in Afnor artificial saliva and evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. Based on these properties, comparisons of coatings performance were linked with the amount of deposited Ag. Increasing the Ag content led to the increase of the corrosion resistance and to the decrease of the forces exhibited on the surface. The hydrophobic character of the coating with the highest Ag amount could prevent thrombosis, thus suggesting its possible use for medical implants.

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“…This observation is sustained more clearly with AFM research. Silver segregation from the carbon matrix to film surface is also confirmed by data in the literature data [20].…”

Section: Electrochemical Stabilitysupporting

confidence: 75%

“…Incorporating between 4.3% and 10.6% Ag into DLC coatings, a decrease of wear rate and friction coefficient simultaneous with the increase of Ag content was observed [19]. It was reported that Ag segregates from carbon due to its low solubility with carbon [20,21]. This can increase silver content at the film surface.…”

Section: Introductionmentioning

confidence: 98%

Investigation of High Voltage Anodic Plasma (HVAP) Ag-DLC Coatings on Ti50Zr with Different Ag Amounts

et al. 2019

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“…Another interesting topic is doped DLC films on steel substrates. Doped DLC films have been prepared and studied, such as B-doped [84,85], Ti-doped [81], Ag-doped [86,87], Ge-doped [88] and so on. These special doped DLC films are ideal protection for the biomedical alloys from oxidation, passivation and to reduce the ability for a bacterial biofilm to form after implantation [89].…”

Section: Another Way-prepared Diamond-like Carbon (Dlc) Filmsmentioning

confidence: 99%

“…These special doped DLC films are ideal protection for the biomedical alloys from oxidation, passivation and to reduce the ability for a bacterial biofilm to form after implantation [89]. Ag-containing DLC films were prepared on 316 steel substrates by magnetron sputtering at different silver target currents, which showed a long-lasting and reusable antibacterial activity through the antibacterial tests of Escherichia coli, attributed to the Ag particles distributed in the films [86,87]. Lopes et al introduced titanium dioxide nanoparticles into the DLC films grown on 304 steel by CVD [90].…”

Section: Another Way-prepared Diamond-like Carbon (Dlc) Filmsmentioning

confidence: 99%

Diamond Deposition on Iron and Steel Substrates: A Review

et al. 2020

Micromachines

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This article presents an overview of the research in chemical vapor deposition (CVD) diamond films on steel substrates. Since the steels are the most commonly used and cost-effective structural materials in modern industry, CVD coating diamond films on steel substrates are extremely important, combining the unique surface properties of diamond with the superior toughness and strength of the core steel substrates, and will open up many new applications in the industry. However, CVD diamond deposition on steel substrates continues to be a persistent problem. We go through the most relevant results of the last two and a half decades, including recent advances in our group. This review discusses the essential reason of the thick catalytic graphite interlayer formed on steel substrates before diamond deposition. The high carbon diffusion in iron would induce severe internal carburization, and then voluminous graphite precipitated from the substrate. In order to hinder the catalytic graphite formation, various methods have been applied for the adherent diamond film deposition, such as pre-imposed various interlayers or multi-interlayers, special controls of the deposition process, the approaches of substrate alloying and so on. We found that adherent diamond films can be directly deposited on Al alloying steel substrates, and then the role of Al alloying element was examined. That is a thin dense amorphous alumina sublayer in situ formed on the alloying substrate, which played a critical role in preventing the formation of graphite phase and consequently enhancing diamond growth and adhesion. The mechanism of Al alloying suggests that the way used to improve hot corrosion resistance is also applicable. Then, some of the hot corrosion resistance methods, such as aluminizing, siliconizing, and so on, which have been used by some researchers examining CVD diamond films on steel substrates, are reviewed. Another way is to prepare diamond-like carbon (DLC) films on steel substrates at low temperature, and then the precipitated graphite from the internal carburization can be effectively avoided. In addition, based on some new findings, the understanding of the diamond nucleation and metastable growth is discussed.

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“…The technique presented here uses larger metal clusters. For a few metals, such as silver [22,23], the metal particles in the surface of a metal-DLC film can be considerably larger than the 10 nm mentioned above. Thus, the holes produced by etching will be correspondingly larger.…”

Section: Introductionmentioning

confidence: 98%

Surface Structuring of Diamond-Like Carbon Films by Chemical Etching of Zinc Inclusions

et al. 2019

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A diamond-like carbon (DLC) film with a nanostructured surface can be produced in a two-step process. At first, a metal-containing DLC film is deposited. Here, the combination of plasma source ion implantation using a hydrocarbon gas and magnetron sputtering of a zinc target was used. Next, the metal particles within the surface are dissolved by an etchant (HNO3:H2O solution in this case). Since Zn particles in the surface of Zn-DLC films have a diameter of 100–200 nm, the resulting surface structures possess the same dimensions, thus covering a range that is accessible neither by mask deposition techniques nor by etching of other metal-containing DLC films, such as Cu-DLC. The surface morphology of the etched Zn-DLC films depends on the initial metal content of the film. With a low zinc concentration of about 10 at.%, separate holes are produced within the surface. Higher zinc concentrations (40 at.% or above) lead to a surface with an intrinsic roughness.

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Effects of silver segregation on sputter deposited antibacterial silver-containing diamond-like carbon films

Cited by 37 publications

References 39 publications

Investigation of High Voltage Anodic Plasma (HVAP) Ag-DLC Coatings on Ti50Zr with Different Ag Amounts

Investigation of High Voltage Anodic Plasma (HVAP) Ag-DLC Coatings on Ti50Zr with Different Ag Amounts

Diamond Deposition on Iron and Steel Substrates: A Review

Surface Structuring of Diamond-Like Carbon Films by Chemical Etching of Zinc Inclusions

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