Background
Type: Article

Green synthesis of silver nanoparticles using flower extract of Malva sylvestris and investigation of their antibacterial activity

Journal: IET Nanobiotechnology (17518741)Year: 2018/06/01Volume: 12Issue: 4Pages: 412 - 416
Esfanddarani H.M.Abbasi Kajani A.a Bordbar A.-K.
GreenDOI:10.1049/iet-nbt.2017.0166Language: English

Abstract

High-quality colloidal silver nanoparticles (AgNP) were synthesised via a green approach by using hydroalcoholic extracts of Malva sylvestris. Silver nitrate was used as a substrate ion while the plant extract successfully played the role of reducing and stabilising agents. The synthesised nanoparticles were carefully characterised by using transmission electron microscopy, atomic-force microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and UV–vis spectroscopy. The maximum absorption wavelengths of the colloidal solutions synthesised using 70 and 96% ethanol and 100% methanol, as extraction solvents, were 430, 485 and 504 nm, respectively. Interestingly, the size distribution of nanoparticles depended on the used solvent. The best particle size distribution belonged to the nanoparticles synthesised by 70% ethanol extract, which was 20–40 nm. The antibacterial activity of the synthesised nanoparticles was studied on Escherichia coli, Staphylococcus aureus and Streptococcus pyogenes using disk diffusion, minimum inhibitory concentrations and minimum bactericidal concentrations assays. The best antibacterial activity obtained for the AgNPs produced by using 96% ethanolic extract. © The Institution of Engineering and Technology 2017.


Author Keywords

Other Keywords

Anti-Bacterial AgentsBacteriaFlowersGreen Chemistry TechnologyMalvaMetal NanoparticlesMicrobial Sensitivity TestsParticle SizePlant ExtractsSilverSpectroscopy, Fourier Transform InfraredAtomic force microscopyEnergy dispersive spectroscopyEscherichia coliEthanolFourier transform infrared spectroscopyHigh resolution transmission electron microscopyOrganic solventsParticle size analysisSize distributionSynthesis (chemical)Transmission electron microscopyantiinfective agentmetal nanoparticleplant extractAbsorption wavelengthsAnti-bacterial activityColloidal silver nanoparticleEnergy dispersive X ray spectroscopyMinimum bactericidal concentrationsMinimum inhibitory concentrationStaphylococcus aureusStreptococcus pyogenesbacteriumchemistrydrug effectflowergreen chemistryinfrared spectroscopymicrobial sensitivity testproceduressynthesisSilver nanoparticles