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<p>Physicochemical properties of silver nanoparticles (AgNPs) produced in this work by the plasma jet assisted method without reducing agents or chemical stabilizers using distilled water as a&#xa0;medium are studied in the present work. The UV-Vis AgNP surface plasmon resonance (SPR) characteristics, confirmed by spectroscopy and FTIR spectra, show the presence of functional groups coming from the breakdown of a&#xa0;water molecule. The crystalline structure of nanoparticles is confirmed by results of XRD analysis, while SEM studies reveal their external spherical shapes. Using tests for the zone of inhibition (ZOI), the minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and antibacterial activity of the produced nanoparticles are assessed. The effectiveness of the AgNPs against pathogenic bacteria is evaluated. The results obtained demonstrate a&#xa0;relationship between the antibacterial efficacy and plasma exposure time. After 20 min of exposure, the ZOI reached 22.5 mm, the MIC decreased to 25 µg/mL, and the MBC reached 40 µg/mL. Our findings indicate that plasma jet assisted manufacturing is a&#xa0;controllable, efficient, and environmentally benign method for creating the bioactive silver nanoparticles with potent antibacterial activity promising for future biological and pharmaceutical applications.</p>

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Plasma-assisted synthesis of silver nanoparticles: optical properties, morphology, and antibacterial activity

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Maryam G. Jasim

摘要

Physicochemical properties of silver nanoparticles (AgNPs) produced in this work by the plasma jet assisted method without reducing agents or chemical stabilizers using distilled water as a medium are studied in the present work. The UV-Vis AgNP surface plasmon resonance (SPR) characteristics, confirmed by spectroscopy and FTIR spectra, show the presence of functional groups coming from the breakdown of a water molecule. The crystalline structure of nanoparticles is confirmed by results of XRD analysis, while SEM studies reveal their external spherical shapes. Using tests for the zone of inhibition (ZOI), the minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and antibacterial activity of the produced nanoparticles are assessed. The effectiveness of the AgNPs against pathogenic bacteria is evaluated. The results obtained demonstrate a relationship between the antibacterial efficacy and plasma exposure time. After 20 min of exposure, the ZOI reached 22.5 mm, the MIC decreased to 25 µg/mL, and the MBC reached 40 µg/mL. Our findings indicate that plasma jet assisted manufacturing is a controllable, efficient, and environmentally benign method for creating the bioactive silver nanoparticles with potent antibacterial activity promising for future biological and pharmaceutical applications.