Copper-Modified Mesoporous Silica Nanoparticles for Antimicrobial Applications.

Area of Science:

• Materials Science
• Nanotechnology
• Infectious Disease Research

Background:

• The rise of antimicrobial-resistant (AMR) bacteria and viral outbreaks presents a significant global health challenge.
• There is an urgent need for novel therapeutic strategies beyond traditional antibiotics.

Purpose of the Study:

• To synthesize and functionalize mesoporous silica nanoparticles (MSNs) with copper for broad-spectrum antimicrobial activity.
• To investigate the impact of copper oxidation states on the efficacy of MSNs against bacterial and viral pathogens.

Main Methods:

• Mesoporous silica nanoparticles (MSNs) were synthesized and functionalized with copper.
• Copper oxidation states were modulated via thermal treatments.
• Modified MSNs were tested against bacterial pathogens (Escherichia coli, Staphylococcus aureus) and viruses (influenza A H1N1, SARS-CoV-2, MS2 bacteriophage).

Main Results:

• Copper-modified MSNs demonstrated complete bactericidal activity against Escherichia coli within 2 hours.
• High efficiency was observed against viruses: >80% for influenza A (H1N1) pdm09, >90% for SARS-CoV-2, and >97% for MS2 bacteriophage.
• The oxidation state of copper significantly influenced antimicrobial efficacy.

Conclusions:

• Copper-functionalized MSNs exhibit potent antibacterial and antiviral properties.
• These nanoparticles represent a potential antibiotic-free alternative for infection prevention.
• This approach may help mitigate the development of antimicrobial resistance.