title: Green synthesis of biogenic silver nanomaterials using Raphanus sativus extract, effects of stabilizers on the morphology, and their antimicrobial activities.
abstract: The present study explores the reducing and capping potentials of aqueous Raphanus sativus root extract for the synthesis of silver nanomaterials for the first time in the absence and presence of two stabilizers, namely, water-soluble starch and cetyltrimethylammonium bromide (CTAB). The surface properties of silver nanoparticles (AgNPs) were determined by dynamic light scattering (DLS), transmission electron microscopy (TEM), energy dispersion X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) techniques. The mean size of AgNPs, ranging from 3.2 to 6.0 nm, could be facilely controlled by merely varying the initial [extract], [CTAB], [starch], and [Ag(+)] ions. The agglomeration number, average number of silver atoms per nanoparticle, and changes in the fermi potentials were calculated and discussed. The AgNPs were evaluated for their antimicrobial activities against different pathogenic organisms. The inhibition action was due to the structural changes in the protein cell wall.
authors.affiliation: Nano-Science Research Lab, Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, 110025, India.
authors.forename: Mohammad Naved
authors.initials: MN
authors.lastname: Khan
authors.affiliation: Nano-Science Research Lab, Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, 110025, India.
authors.forename: Tabrez Alam
authors.initials: TA
authors.lastname: Khan
authors.affiliation: Department of Chemistry, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia. drkhanchem@yahoo.co.in.
authors.forename: Zaheer
authors.initials: Z
authors.lastname: Khan
authors.affiliation: Department of Chemistry, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia.
authors.forename: Shaeel Ahmed
authors.initials: SA
authors.lastname: Al-Thabaiti
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D005658:Fungi / Q000187:drug effects; D053768:Metal Nanoparticles; D008826:Microbial Sensitivity Tests; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010936:Plant Extracts / Q000378:metabolism*; D031224:Raphanus / Q000378:metabolism*; D012834:Silver / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000890:Anti-Infective Agents; D010936:Plant Extracts; D012834:Silver
keywords: Antimicrobial activities; Green synthesis; Nanostructures; Optical properties