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Antibacterial Activity of Silver-Modified CuO Nanoparticle-Coated Masks.

Tanuja Udawant1, Prajkta Thorat1, Payal Thapa2

  • 1Modern College of Arts, Science, and Commerce, Pune 411005, India.

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|January 8, 2025
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Summary

Researchers developed cost-effective, silver-modified copper oxide (Ag-CuO) nanoparticles for surgical masks. These nanoparticle-coated masks demonstrate broad-spectrum antibacterial activity against airborne and soil-borne bacteria by generating reactive oxygen species (ROS).

Keywords:
Ag-CuOAg-ZnOROSZoIZone of inhibitionairborne bacteriamasksnanoparticlesreactive oxygen speciessonication

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biotechnology

Background:

  • Disposable surgical masks lack inherent antimicrobial properties, posing infection risks.
  • Nanoparticles offer potential for enhanced mask functionality against microbial threats.
  • Silver and metal oxides are known for their antimicrobial properties.

Purpose of the Study:

  • To develop a green and cost-effective method for coating surgical masks with silver-modified copper oxide (Ag-CuO) nanoparticles.
  • To evaluate the structural, surface, and morphological characteristics of the Ag-CuO nanoparticle-coated masks.
  • To assess the antibacterial efficacy of the modified masks against common bacterial species.

Main Methods:

  • Sonochemical synthesis of Ag-CuO nanoparticles.
  • Coating of nanoparticles onto disposable surgical masks.
  • Characterization using X-ray Diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FT-IR), and Field Emission Scanning Electron Microscopy (FE-SEM).
  • Antibacterial activity testing using Zone of Inhibition (ZoI) assays against *S. aureus* and *E. coli*.

Main Results:

  • Homogeneous coating of Ag-CuO nanoparticles (~70 nm average size) on mask fibers was confirmed by FE-SEM.
  • XRD and FT-IR confirmed the structural and surface properties of the NP-coated masks.
  • Significant antibacterial activity was observed against both Gram-positive (*S. aureus*) and Gram-negative (*E. coli*) bacteria.
  • The antibacterial effect is attributed to the synergistic action of Ag and CuO, leading to increased reactive oxygen species (ROS) generation.

Conclusions:

  • A novel, eco-friendly sonochemical method successfully produced Ag-CuO nanoparticle-coated surgical masks.
  • The Ag-CuO NP-coated masks exhibit potent antibacterial properties against airborne and soil-borne bacteria.
  • The enhanced antimicrobial efficacy is linked to ROS generation, highlighting the potential of these masks in infection control.