Structure characterization and antibacterial properties of Ag-DLC films fabricated by dual-targets HiPIMS

Wang, Hao; Wang, Langping

doi:10.1016/j.surfcoat.2021.126967

Cited by 20 publications

(14 citation statements)

References 63 publications

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“…Therefore, with increasing Ag contents, one may expect Ag segregation as kinetic limitations are overcome by enabling surface diffusion, as well as bulk diffusion due to positive enthalpy of mixing of Ag with two out of four MG constituents. [15], induced by ion bombardment, during film growth. While the films deposited at 60 and 200 • C did not show any detectable peaks, the films deposited at 400 • C were at least in part crystalline.…”

Section: Resultsmentioning

confidence: 99%

“…Regardless of the sputtering approach, common features observed in such films were Ag segregations. The presence of these segregations was influenced by process parameters such as the power applied to the Ag target, and therefore, the Ag content [ 4 , 14 , 15 ], the substrate temperature [ 16 ] as well as the bias potential during deposition [ 11 , 15 , 17 , 18 ]. The surface segregations were a result of Ag diffusion towards the surface followed by coalescence.…”

Section: Introductionmentioning

confidence: 99%

“…Figure2cgathers the X-ray diffractograms of the TFMGs deposited at 60, 200 and 400 • C. The motivation behind the deposition at a substrate temperature of 60 • C was to avoid possible local heating[15], induced by ion bombardment, during film growth. While the films deposited at 60 and 200 • C did not show any detectable peaks, the films deposited at 400 • C were at least in part crystalline.…”

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confidence: 99%

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Ag Surface and Bulk Segregations in Sputtered ZrCuAlNi Metallic Glass Thin Films

et al. 2022

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We report on the formation of Ag-containing ZrCuAlNi thin film metallic glass (nano)composites by a hybrid direct-current magnetron sputtering and high-power pulsed magnetron sputtering process. The effects of Ag content, substrate temperature and substrate bias potential on the phase formation and morphology of the nanocomposites were investigated. While applying a substrate bias potential did not strongly affect the morphological evolution of the films, the Ag content dictated the size and distribution of Ag surface segregations. The films deposited at low temperatures were characterized by strong surface segregations, formed by coalescence and Ostwald ripening, while the volume of the films remained featureless. At higher deposition temperature, elongated Ag segregations were observed in the bulk and a continuous Ag layer was formed at the surface as a result of thermally enhanced surface diffusion. While microstructural observations have allowed identifying both surface and bulk segregations, an indirect method for detecting the presence of Ag segregations is proposed, by measuring the electrical resistivity of the films.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Ag Surface and Bulk Segregations in Sputtered ZrCuAlNi Metallic Glass Thin Films

et al. 2022

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“…The PVD processes for DLC deposition usually involve methods such as sputtering [91], direct ion beam [92], pulsed laser deposition [93], and cathodic vacuum arc techniques [94]. PVD deposition mechanisms generally involve the bombardment of carbon atoms onto a substrate; however, the amounts of energy per unit ion are different when producing films with different characteristics [95].…”

Section: Preparation Method: Physical Vapor Depositionmentioning

confidence: 99%

“…Wang et al [91] fabricated Ag-DLC films via dual-target high power impulse magnetron sputtering (HiPIMS). The deposited AgNPs have a small size, which promotes the release of silver ions and antibacterial activity against Escherichia coli and Staphylococcus aureus.…”

Section: Preparation Method: Physical Vapor Depositionmentioning

confidence: 99%

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

et al. 2021

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Due to their outstanding properties, carbon-based structures have received much attention from the scientific community. Their applications are diverse and include use in coatings on self-lubricating systems for anti-wear situations, thin films deposited on prosthetic elements, catalysis structures, or water remediation devices. From these applications, the ones that require the most careful testing and improvement are biomedical applications. The biocompatibility and antibacterial issues of medical devices remain a concern, as several prostheses still fail after several years of implantation and biofilm formation remains a real risk to the success of a device. Sputtered deposition prevents the introduction of hazardous chemical elements during the preparation of coatings, and this technique is environmentally friendly. In addition, the mechanical properties of C-based coatings are remarkable. In this paper, the latest advances in sputtering methods and biocompatibility and antibacterial action for diamond-based carbon (DLC)-based coatings are reviewed and the greater outlook is then discussed.

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Antibacterial properties of modified a-C and ta-C coatings: the effects of the sp2/sp3 ratio, oxidation, nitridation, and silver incorporation

et al. 2022

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Structure characterization and antibacterial properties of Ag-DLC films fabricated by dual-targets HiPIMS

Cited by 20 publications

References 63 publications

Ag Surface and Bulk Segregations in Sputtered ZrCuAlNi Metallic Glass Thin Films

Ag Surface and Bulk Segregations in Sputtered ZrCuAlNi Metallic Glass Thin Films

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

Antibacterial properties of modified a-C and ta-C coatings: the effects of the sp2/sp3 ratio, oxidation, nitridation, and silver incorporation

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