Comparison of HIPIMS sputtered Ag- and Cu-surfaces leading to accelerated bacterial inactivation in the dark

Abstract

Recently, compact uniform and adhesive films of Ag and Cu have been prepared by DC-magnetron sputtering (DC), pulsed DC magnetron sputtering (DCP) and high power impulse magnetron sputtering (HIPIMS). This study reports the HIPIMS deposition for Ag and Cu on textile fabrics, the bacterial inactivation kinetics and the nature of the species in the plasma produced during HIPIMS sputtering. The deposition rates of Ag and Cu atoms and the bacterial inactivation times are reported in the dark and under light as a function of the applied peak currents during the sputtering by HIPIMS. By X-ray photoelectron spectroscopy (XPS), the surface percentage atomic concentration and the oxidation state changes are reported during bacterial inactivation. The Ar and metal-ions produced in the magnetron chamber were determined by mass spectroscopy (QMS). A mechanism for the bacterial inactivation is suggested for Ag and Cu HIPIMS sputtered surfaces.

Impact of pulse duration in high power impulse magnetron sputtering on the low-temperature growth of wurtzite phase (Ti,Al)N films with high hardness

“…As for an applied research on HIPIMS deposition at a low growth temperature, Baghriche and Rtimi et al reported that the deposition of Ag and Cu films on polyester fibers resulted in the inactivation of Escherichia coli bacteria on textile fabrics. [17,18]. All the above investigations have demonstrated the highly advantageous properties of HIPIMS deposited films even at a lower deposition temperature.…”

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

“…The property of oxophilicity reduces simultaneously the very strong toxicity known for silver. Copper nanoparticles with variable degrees of oxidation can be generated by chemical synthesis, laser induced ablation and fragmentation, or inexpensive sputtering processes . When these copper particles (in the size range from 1 nm up to 10 µm) are grafted onto textiles or cellulose, it is possible to control the kinetics of dissolution, which is rapid for nanoparticles, but show a kind of delay or depot effect for the micrometer sized particles.…”

“…When these copper particles (in the size range from 1 nm up to 10 µm) are grafted onto textiles or cellulose, it is possible to control the kinetics of dissolution, which is rapid for nanoparticles, but show a kind of delay or depot effect for the micrometer sized particles. For medical applications, the study of the combination of size controlled copper nanoparticles and cellulose is promising and rewarding both for fundamental research and direct pathogen treatment …”

Porous Titanium Surfaces to Control Bacteria Growth: Mechanical Properties and Sulfonated Polyetheretherketone Coatings as Antibiofouling Approaches

“…Other alternatives have been proposed to reduce bacterial infection not only by killing them by using bactericidal substances such as silver [22][23][24], gold, copper, magnesium, and TiO 2 (among others) [25] nanoparticles but also by inhibiting their adhesion process by using antibiofouling substrates. Unfortunately, none of these approaches have been truly effective, and there are still some safety concerns related to nanoparticle-controlled release in medicine.…”