title: Evaluation of the catalytic, antibacterial and anti-biofilm activities of the Convolvulus arvensis extract functionalized silver nanoparticles.
abstract: In this study, a rapid green synthesis of the silver nanoparticles (AgNPs) using leaves extract of Convolvulus arvensis was investigated. UV-Visible spectra showed the SPR band at around 430nm which proved the AgNP formation. The reduction of silver ions to nanoparticles was completed within 150min. Particle size analysis verified the formation of AgNPs with average size of 28nm, while their PDI was 0.2. XRD patterns verified the crystalline nature of produced AgNPs. SEM images verified the presence of spherical nanoparticles with no evidence of aggregations. FTIR analysis verified the involvement of the phenolic compounds in AgNP formation. It was found that the biosynthesized AgNPs have the antibacterial activity against human pathogen E. coli. Also, nanoparticles exhibit biofilm degrading activity against both bacterial strains of S. aureus and P. aeruginosa. Furthermore, the synthesized AgNPs prevented the coagulation of blood samples. The accelerated reduction of methylene blue (MB) in the presence of AgNPs with rate constant of 0.108min-1, confirmed the catalytic potential of nanoparticles.
authors.affiliation: Department of Cellulose and Paper Technology, Faculty of New Technologies and Energy Engineering, Shahid Beheshti University, P.O. Box: 47815-168, Zirab Campus, Iran. Electronic address: se_hamedi@sbu.ac.ir.
authors.forename: Sepideh
authors.initials: S
authors.lastname: Hamedi
authors.affiliation: Biotechnology group, Chemical Engineering Faculty, Tarbiat Modares University, P.O. Box: 14115-114, Tehran, Iran.
authors.forename: Seyed Abbas
authors.initials: SA
authors.lastname: Shojaosadati
authors.affiliation: Biotechnology group, Chemical Engineering Faculty, Tarbiat Modares University, P.O. Box: 14115-114, Tehran, Iran.
authors.forename: Aref
authors.initials: A
authors.lastname: Mohammadi
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D018441:Biofilms / Q000187:drug effects*; D002384:Catalysis; D031254:Convolvulus / Q000737:chemistry*; D006801:Humans; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D008855:Microscopy, Electron, Scanning; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D012834:Silver / Q000737:chemistry*; D013057:Spectrum Analysis; D013211:Staphylococcus aureus / Q000187:drug effects; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D010936:Plant Extracts; D012834:Silver
keywords: Anti-biofilm activity; Catalytic activity; Convolvulus arvensis L.; Phyto-synthesis; Silver nanoparticle