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Bactericidal Silver Nanoparticles by Atmospheric Pressure Solution Plasma Processing.

Janith Weerasinghe^1,2, Wenshao Li³, Rusen Zhou⁴

¹School of Chemistry and Physics, Queensland University of Technology, Brisbane 4000, Queensland, Australia.

Nanomaterials (Basel, Switzerland)

|May 7, 2020

Summary

This summary is machine-generated.

Researchers developed a novel, cost-effective method to synthesize silver nanoparticles using plasma. This technique avoids chemical reducing agents and demonstrates antibacterial activity against common bacteria.

Keywords:

AC – DBD plasma plasma production of nanoparticles silver nanoparticles

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Area of Science:

Materials Science
Nanotechnology
Chemistry

Background:

Silver nanoparticles (AgNPs) are crucial in various fields, including plasmonics, medicine, catalysis, and electronics.
Conventional synthesis methods often rely on chemical reducing agents, posing environmental and cost concerns.
Developing facile and sustainable synthesis routes for AgNPs is an ongoing research objective.

Purpose of the Study:

To report a simple, cost-effective, and reproducible method for synthesizing silver nanoparticles.
To investigate the formation mechanism of AgNPs produced via plasma-induced non-equilibrium liquid chemistry.
To evaluate the antibacterial efficacy of the synthesized AgNPs against Gram-positive and Gram-negative bacteria.

Main Methods:

Synthesis of silver nanoparticles using plasma-induced non-equilibrium liquid chemistry without chemical reducing agents.
Characterization of silver nanoparticle size and morphology using Transmission Electron Microscopy (TEM) and other analytical techniques.
Assessment of antibacterial activity through inhibition assays against representative Gram-positive and Gram-negative bacterial strains.

Main Results:

Successfully synthesized silver nanoparticles with tunable sizes ranging from 5.4 to 17.8 nm.
Proposed a plausible mechanism for silver nanoparticle formation under plasma conditions.
Demonstrated significant inhibition of both Gram-positive and Gram-negative bacteria by the synthesized AgNPs.

Conclusions:

Plasma-induced non-equilibrium liquid chemistry offers a promising, rapid, and reagent-free alternative for silver nanoparticle synthesis.
The synthesized AgNPs exhibit broad-spectrum antibacterial activity, highlighting their potential in medical and antimicrobial applications.
This method provides a sustainable and efficient route for producing functionalized silver nanoparticles for diverse technological applications.