title: Biogenic synthesis, optimisation and antibacterial efficacy of extracellular silver nanoparticles using novel fungal isolate Aspergillus fumigatus MA.
abstract: To eliminate the elaborate processes employed in other non-biological-based protocols and low cost production of silver nanoparticles (AgNPs), this study reports biogenic synthesis of AgNPs using silver salt precursor with aqueous extract of Aspergillus fumigates MA. Influence of silver precursor concentrations, concentration ratio of fungal extract and silver nitrate, contact time, reaction temperature and pH are evaluated to find their effects on AgNPs synthesis. Ultraviolet-visible spectra gave surface plasmon resonance at 420 nm for AgNPs. Fourier transform infrared spectroscopy and X-ray diffraction techniques further confirmed the synthesis and crystalline nature of AgNPs, respectively. Transmission electron microscopy observed spherical shapes of synthesised AgNPs within the range of 3-20 nm. The AgNPs showed potent antimicrobial efficacy against various bacterial strains. Thus, the results of the current study indicate that optimisation process plays a pivotal role in the AgNPs synthesis and biogenic synthesised AgNPs might be used against bacterial pathogens; however, it necessitates clinical studies to find out their potential as antibacterial agents.
authors.affiliation: Department of Biotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonipat, India.
authors.forename: Vikas
authors.initials: V
authors.lastname: Sarsar
authors.affiliation: Department of Biotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonipat, India.
authors.forename: Manjit K
authors.initials: MK
authors.lastname: Selwal
authors.affiliation: Department of Animal Sciences, The Ohio State University, Columbus, OH, USA. krishan.kselwal@gmail.com.
authors.forename: Krishan K
authors.initials: KK
authors.lastname: Selwal
mesh_terms: D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000138:chemical synthesis*; D001232:Aspergillus fumigatus / Q000737:chemistry*; D018407:Bacterial Physiological Phenomena / Q000187:drug effects*; D002457:Cell Extracts / Q000737:chemistry*; D002470:Cell Survival / Q000187:drug effects; D055772:Green Chemistry Technology / Q000379:methods; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry / Q000648:ultrastructure; D010316:Particle Size; D012834:Silver / Q000008:administration & dosage* / Q000737:chemistry; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D002457:Cell Extracts; D012834:Silver