Silver effect on the tribological and antibacterial properties of a-C:Ag coatings

Investigation of the Antibacterial Properties of Silver-Doped Amorphous Carbon Coatings Produced by Low Pressure Magnetron Assisted Acetylene Discharges

“…This takes place as long as the bulk of the coating can act as an Ag reservoir ( Figure 9 ). This Ag release hypothesis corroborates the work of Dominguez-Meister, who quantified by ICP the time dependence of the Ag released from a-C films doped with Ag in deionized water [ 27 ]. The coating doped with 9.7% of Ag presents a high release during the first days to reach a maximum of 0.24 mg/L afterwards (estimated at 9% of the Ag total content contained in the antimicrobial layer), followed by a decrease in the delivery rate over the following days.…”

“…Table 2 evidences that the antibacterial features of these a-C coatings doped with Ag depend on the Ag concentration in the antimicrobial layer. Dominguez-Meister et al [ 27 ] suggested that there should be an Ag threshold above which antibacterial properties can be observed. They estimated it at 7 at.%.…”

Smart Tribological Coating

“…Such new funct onal t es can nclude propert es such as nfect on res stance where the coated surface of a b omed cal dev ce can el m nate b of lm format on wh le preserv ng the requ red tr bolog cal propert es [22][23][24]. It has also been shown that ant m crob al coat ng on mplants has reduced the r sk of both mplant and surg cal s te nfect on wh le reduc ng reject on postsurgery [25][26][27].…”

An alternative approach to the tribological analysis of Si-doped DLC coatings deposited with different bias voltages using Raman spectroscopy mapping

“…Silicon doping, as studied in this work, has been reported to increase the thermal stability of the films, while having positive effects on the tribological properties due to the formation of silicon-oxides on the surface of the films [19][20][21]. Although the mechanical properties have been observed to drop with silicon doping up to a defined content threshold [22], alternative dopants can be employed to reduce the compressive stress of the film or provide new properties, such as antibacterial [15,23].…”