Silver surface segregation in Ag-DLC nanocomposite coatings

Manninen, Noora; Galindo, R. Escobar; Carvalho, S.; Cavaleiro, A.

doi:10.1016/j.surfcoat.2014.12.029

Cited by 44 publications

(18 citation statements)

References 42 publications

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“…In fact, Ag-TiN coating presents three-sided pyramidal shaped grains, uniformly on a more open surface, induced by the grow of a second silver phase. For samples with silver and high oxygen content it is possible to see the presence of Ag clusters and some aggregates on the surface as it has been reported in other studies [34][35][36]. The formation of Ag nanoparticles is related to the immiscibility of Ag in the Ti(O)N matrix.…”

Section: Chemical and Morphology Characterizationsupporting

confidence: 69%

Surface functionalization of 3D printed structures: Aesthetic and antibiofouling properties

Castro

Carneiro

Marques

et al. 2020

Surface and Coatings Technology

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Additive manufacturing (AM) is a hot topic nowadays, having a first order in importance in research trends, improving existent technologies and carrying them further. AM can be applied to ceramics, which have importance in current technologies. Their capability to maintain functional properties for long time periods, combined with the easiness to process and the abundance of raw materials, make them a fundamental part of mankind development. Within ceramics, stoneware has a wide range of uses but in some conditions, it can be affected by biofouling. Ti(O)N and Ag-Ti(O)N coatings over 3D printed stoneware, were presented as multifunctional solution, linking aesthetical and antimicrobial properties. Films were developed by reactive direct current (DC) magnetron sputtering and characterized physical, chemical and morphologically, as well as regarding their colour variation. Moreover roughness, wettability, antibacterial and antibiofouling were also evaluated. The results revealed that the Ag doped coatings (with or without oxygen addition) had an enhanced multifunctionality compared to control samples (without Ag). Ag nanoparticles addition created a surface with potential antibacterial and antibiofouling activities, in order to resist outdoors and aqueous environments, making these films able to be applied in architectural pieces as sculptures or other decorative parts, maintaining their properties with good aesthetical properties. implants, soft tissue replacements, drug deliveries, among others [2]; aerospace industry, in reduced volume parts and replacements parts for aircraft with advanced materials as aluminium alloys, titanium alloys, nickel super-alloys and special steels; automotive industry, in the development of some structural and engine parts; and tooling industry, like moulds with complex refrigeration systems enabling better performances and higher life time, [3]. Additive manufacturing, namely with metals and polymers, is no longer the future, it is the unavoidable present, but the additive manufacture of ceramic materials is still far from the desired maturity. Abundance, easy manipulation, low cost, heat resistance and long life time span are the main characteristics of ceramics [4] and across human history, new technologies have enlarged its uses. Chemically, ceramics can be considered as compounds formed between metallic and non-metallic elements with predominant ionic bonding but having a

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Section: Chemical and Morphology Characterizationsupporting

confidence: 69%

Surface functionalization of 3D printed structures: Aesthetic and antibiofouling properties

Castro

Carneiro

Marques

et al. 2020

Surface and Coatings Technology

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“…AgDLC coatings have been pointed as an effective coating for biomedical implants due to their good corrosion resistance and wear resistance, antibacterial activity and hemocompatibility. The amorphous carbon coatings containing about 5.5 at% of Ag were not toxic against mouse MC3T3 osteoblastic cells [10] [11].…”

Section: Ag: Dlc Layers Prepared By Double Pldmentioning

confidence: 95%

Hybrid Laser Technology for Creation of Doped Biomedical Layers

Jelı́nek¹,

Bačáková²,

Remsa³

et al. 2016

MSCE

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Hybrid laser technologies for deposition of thin films and basic schemes of combination of pulsed laser deposition (PLD) with magnetron sputtering and RF discharges or two lasers or three laser deposition systems are presented. Experiences with deposition of chromium doped diamond-like carbon (DLC) films for coating of prostheses are described. Layers of different chromium concentrations were prepared using hybrid systems (PLD + magnetron sputtering or by double PLD). Results of physical and mechanical characterization of film properties and biomedical tests of trivalent and toxic hexavalent chromium are given. Experiences with double laser deposition of DLC layers doped with silver are also mentioned.

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“…SEM images of all coated samples (Figure 1b-e) show that the HVAP coating process covered the surface of the substrate with a DLC film. According to literature data in Ag-DLC coatings, Ag particles are dispersed in the amorphous carbon matrix [26] and, depending on the Ag amount, a process of surface segregation of silver may take place in time. As can be seen in Figure 1c-e, Ag nanoparticles and clusters (200-400 nm) are present on the surface of samples A2, A3, and A4.…”

Section: Electrochemical Stabilitymentioning

confidence: 99%

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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Silver surface segregation in Ag-DLC nanocomposite coatings

Cited by 44 publications

References 42 publications

Surface functionalization of 3D printed structures: Aesthetic and antibiofouling properties

Surface functionalization of 3D printed structures: Aesthetic and antibiofouling properties

Hybrid Laser Technology for Creation of Doped Biomedical Layers

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

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