银纳米粒子
硝酸银
抗菌活性
核化学
纳米颗粒
扫描电子显微镜
还原剂
材料科学
吸收光谱法
纳米技术
微晶
粉末衍射
金属
化学工程
化学
有机化学
结晶学
冶金
细菌
复合材料
遗传学
物理
量子力学
生物
工程类
作者
Muhammad Asif,Riffat Yasmin,Rizwan Asif,Ana Ambreen,Madiha Mustafa,Shehla Umbreen
出处
期刊:Dose-response
[SAGE]
日期:2022-04-01
卷期号:20 (2): 155932582210887-155932582210887
被引量:23
标识
DOI:10.1177/15593258221088709
摘要
In the field of nanotechnology, the metallic nanoparticles are of remarkable interest because of their unique electronic, magnetic, chemical, and mechanical properties.In the present work, silver nanoparticles (AgNPs) were synthesized using bio-reduction method.Silver nitrate was used as metallic precursor and the extract of Moringa oleifera leaves with different concentrations was used as reducing as well capping agent. The extract exhibited strong potential in rapid reduction of silver ions for the synthesis of silver nanoparticles. The synthesized silver nanoparticles were characterized by UV-visible spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques.The absorption SPR peaks appeared in the range of 415 to 439 nm. SEM analysis exhibited that particles were spherical in shape with size distribution range from 10 nm to 25 nm. The synthesized silver nanoparticles were pure crystalline in nature as confirmed by the XRD spectra with average crystallite size 7 nm. In vitro antibacterial activity of the prepared silver nanoparticles colloidal samples as well the extract was studied using different concentrations of AgNPs (C1 = 100 μg/ml, C2 = 50 μg/ml, C3 = 25 μg/ml) by well diffusion method against Gram negative Escherichia coli. The antibacterial performance was assessed by measuring the zone of inhibition (ZOI).The results suggested that AgNPs prepared by green approach can be considered as an alternative antibacterial agent.
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