Growth suppression of bacteria by biofilm deterioration using silver nanoparticles with magnetic doping

Abstract

Decades of antibiotic use and misuse have generated selective pressure toward the rise of antibiotic-resistant bacteria, which now contaminate our environment and pose a major threat to humanity. According to...

The Promise of Metal-Doped Iron Oxide Nanoparticles as Antimicrobial Agent

“…143 Additionally, doping metals (Co, Fe, 140 Cu, 141,143 Zn 143 ) could also increase the charge density on the nanoparticles surface, contributing to higher ROS generations. 149 Magnetic behaviors of the nanoparticles (Co, Fe-doped Ag 140 ) mechanically damage the microorganisms, increasing the antimicrobial activity of the magnetic metal-doped nanoparticles. 150 On rare occasions, the antimicrobial properties of doped nanoparticles could be triggered by different stimuli, e.g., light, 141−144 temperature, 114 pH, 143 magnetic field, 140 and catalyst concentration 143,144 (Figure 5).…”

“…149 Magnetic behaviors of the nanoparticles (Co, Fe-doped Ag 140 ) mechanically damage the microorganisms, increasing the antimicrobial activity of the magnetic metal-doped nanoparticles. 150 On rare occasions, the antimicrobial properties of doped nanoparticles could be triggered by different stimuli, e.g., light, 141−144 temperature, 114 pH, 143 magnetic field, 140 and catalyst concentration 143,144 (Figure 5). Shujah et al (2022) 32 reported that when MDI was exposed to light irradiation with photon energy, excited electrons get trapped by the molecular oxygen (O 2 ) present on the surface, resulting in production of greater superoxide anion radicals.…”

“…On rare occasions, the antimicrobial properties of doped nanoparticles could be triggered by different stimuli, e.g ., light, − temperature, pH, magnetic field, and catalyst concentration , (Figure ). Shujah et al (2022) reported that when MDI was exposed to light irradiation with photon energy, excited electrons get trapped by the molecular oxygen (O 2 ) present on the surface, resulting in production of greater superoxide anion radicals. , Moreover, increase of pH could also elevate the negative charge resulting in adsorbing more OH – ions, promoting the formation of higher • OH free radicals .…”

“…coli and S. aureus, respectively. , It should be noted that MIC values for other metal ion-doped magnetic nanoparticles were not reported. ,,, These metal-doped magnetic nanoparticles (Ni-, Co-, and Fe-doped MgO) interacts with the thiol groups found in essential bacterial enzymes, leading to their inactivation and cell death . Moreover, metal doping could also influence the size and magnetic properties of the magnetic nanoparticles by decreasing the energy band gap and combining electronic charges with spins. , As the size of metal-doped nanoparticles decreased, the antimicrobial activity could increase due to higher surface to volume ratio, facilitating greater interaction with bacterial cell .…”

Sustainable and scalable development of PVDF-OH Ag/TiOx nanocomposites for simultaneous oil/water separation and pollutant degradation

“…For this, we stably decorated with Ag/TiO x NPs the surface of chemically resistant polyvinylidene fluoride (PVDF) nanofibrous membranes generated by electrospinning. Although the NPs of each of these elements can separately provide significant improvements like antibacterial behavior, 24 wettability tuning, 25 or self-cleaning properties, 26 when combined, they can additionally provide a more cost-effective solution for large-scale applications because Ti is a more earth-abundant element than Ag. 27 Moreover, as demonstrated in a seminal study, 28 the combination of the two elements enables the formation of chemically active sites leading to better catalytic performance than in the single-element counterparts, thus turning the membranes into catalysts.…”