Antimicrobial and cytotoxicity properties of biosynthesized gold and silver nanoparticles using D. brittonii aqueous extract

Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange

“…The broad band in 3456.14 cm −1 is OH stretching bond of hydroxyl functional group 33 . The peak appearing at 1637.26 cm −1 corresponds to CO stretching of carbonyl group that become manifest in this range 34 . The shifting and loss of peaks from AuNPs relative to those from H. macroloba extract prove the presence of a reaction between the H. macroloba and HM‐AuNPs 35 …”

“…33 The peak appearing at 1637.26 cm À1 corresponds to C O stretching of carbonyl group that become manifest in this range. 34 The shifting and loss of peaks from AuNPs relative to those from H. macroloba extract prove the presence of a reaction between the H. macroloba and HM-AuNPs. 35 F I G U R E 4 (A) X-ray diffraction pattern and (B) x-ray photoelectron spectroscopy spectrum of Halimeda macroloba mediated gold nanoparticles.…”

Biosynthesis of silver nanoparticles (Ag-NPs) using Senna alexandrina grown in Saudi Arabia and their bioactivity against multidrug-resistant pathogens and cancer cells

“…Furthermore, the UV–Vis spectrum of Ag-NPs formation has been confirmed to be between 350 and 490 nm, with sharp peaks at 350, 380, 420, and 490 nm ( Dong et al, 2021 ). Kuppusamy et al (2022) reported that a spectrophotometer with visible and ultraviolet rays confirmed the composite samples, with peaks close to 490 nm recorded at 535 nm and 456 nm for gold and silver particles, respectively. In our research, we found that the wavelength range extends from 426 to 668 nm, with 490 nm being the optimal wavelength for obtaining the highest possible absorbency.…”

Titanium-Dioxide-Nanoparticle-Embedded Polyelectrolyte Multilayer as an Osteoconductive and Antimicrobial Surface Coating

“…Another reason for observing such a result could be related to the seeding density and the culture materials used. Other studies have been conducted using widely varying methods and seeding densities (from 10 5 CFU/mL [52] to 10 6 CFU/mL [53], to 10 9 CFU/mL [54]). No significant statistical differences between nanoparticle types were observed.…”

“…Their attractive antimicrobial properties arise from metal ion release (bactericidal), oxidative stress, and non-oxidative mechanisms (Table 1) [43][44][45][46][47][48][49]. Silver nanoparticles (AgNPs) have long been considered for their antibacterial capacity, although their cytotoxicity has significantly hindered their progress toward clinical application [50][51][52][53][54][55]. Meanwhile, titanium dioxide nanoparticles (TiO 2 NPs) have shown antibacterial efficacy while demonstrating better cytocompatibility [56][57][58][59][60] and even promoting bone formation owing their osteoconductive properties [57,[61][62][63][64].…”