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Related Concept Videos

Microbial Corrosion01:24

Microbial Corrosion

Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...

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TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
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Functionalised Mesoporous Silica Thin Films as ROS-Generating Antimicrobial Coatings.

Magdalena Laskowska1, Paweł Kowalczyk2, Agnieszka Karczmarska1

  • 1Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland.

International Journal of Molecular Sciences
|August 14, 2025
PubMed
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A novel nanocomposite coating containing copper phosphonate groups effectively eliminates bacteria by generating reactive oxygen species (ROS). This innovative material shows high potential for antimicrobial applications without harming human cells.

Keywords:
ROSSBA-15 silicaantibacterial coatingsfunctional materialssingle-atom catalysisthin films

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Microbiology

Background:

  • The COVID-19 pandemic highlighted the need for effective strategies against pathogenic microorganisms.
  • Continuous disinfection of high-touch surfaces is a growing concern.
  • There is a demand for advanced antimicrobial coatings as alternatives to traditional disinfection methods.

Purpose of the Study:

  • To design, synthesize, and characterize a novel nanocomposite coating with antimicrobial properties.
  • To investigate the mechanism of action, specifically the generation of reactive oxygen species (ROS).
  • To evaluate the coating's efficacy against a broad spectrum of bacteria and assess its cytotoxicity.

Main Methods:

  • Synthesis of a mesoporous SBA-15 silica matrix incorporating copper phosphonate groups.
  • Characterization using microscopic observations and Raman spectroscopy.
  • Assessment of ROS generation via fluorescence microscopy.
  • Antimicrobial activity testing against Gram-positive and Gram-negative bacteria.
  • Cytotoxicity evaluation on BALB/c3T3 mouse fibroblast and HeLa cells.

Main Results:

  • The synthesized material's structure and molecular composition were confirmed.
  • The copper phosphonate groups effectively catalyzed the generation of ROS.
  • The nanocomposite coating demonstrated significant antimicrobial activity against a wide range of bacteria.
  • No cytotoxicity was observed towards tested mammalian cell lines (fibroblast and HeLa cells).

Conclusions:

  • The developed nanocomposite coating exhibits a promising antimicrobial mechanism through ROS generation.
  • The material is structurally sound, effective against diverse bacteria, and safe for mammalian cells.
  • This innovative coating holds significant potential for practical applications in combating microbial contamination.