Biosynthesis of antibacterial silver nanoparticles using Astragalus verus Olivier

Micro & nano letters

article

Zahra Askari¹  Mohammad Reza Vahabi¹  Alireza Allafchian²  Seyed Alireza Mousavi¹  Seyed Amir Hossein Jalali¹ 

[1] Department of Natural Resources, Isfahan University of Technology;Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology;Research Institute for Biotechnology and Bioengineering, Isfahan University of Technology

关键词: silver;    X-ray diffraction;    ultraviolet spectra;    microorganisms;    pH;    nanofabrication;    toxicology;    nanomedicine;    biomedical materials;    antibacterial activity;    transmission electron microscopy;    nanoparticles;    field emission electron microscopy;    scanning electron microscopy;    visible spectra;    Fourier transform infrared spectra;    gum tragacanth;    chemical reducing agent;    UV–vis spectroscopy analyses;    FESEM images;    tragacanth concentrations;    Gram-negative bacterial species;    Gram-positive bacterial species;    TEM images;    XRD;    FT-IR;    Astragalus;    Olivier;    antibacterial silver nanoparticle biosynthesis;    Ag;   

DOI  :  10.1049/mnl.2019.0306

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, a green method was introduced for preparing silver nanoparticles (Ag NPs) using gum tragacanth extracted from Astragalus verus Olivier. The absence of a chemical reducing agent that may be toxic is an advantage of this method. The Ag NPs were prepared in different tragacanth concentrations, pH values, and temperatures. XRD, FT-IR, and UV–vis spectroscopy analyses confirmed the structure of the synthesised Ag NPs. TEM and FESEM images showed that the prepared Ag NPs have spherical shapes. The FESEM images determined that a pH of 10 and a synthesis temperature of 50°C would be the optimal condition for preparing Ag NPs in this method. The change in concentration of tragacanth does not have much effect on the quality of Ag NPs. Obtained data from DLS revealed that the average diameter of Ag NPs is about 40 nm. The antibacterial activity of the prepared nanoparticles was evaluated against both Gram-positive and Gram-negative bacterial species. The results of the antibacterial tests showed that the prepared Ag NPs possess a desirable antibacterial activity.

【 授权许可】

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