Canadian Researchers Introduce an Antimicrobial Coating That Doesn’t Require Disinfection
Researchers from the University of Saskatchewan in Canada and the University of Windsor have announced a novel antimicrobial coating for high-touch public surfaces such as door handles and escalator rails. Reported in the scientific journal RSC Sustainability, the coating aims to reduce microbial presence without the need for routine disinfection steps, potentially making public spaces easier to sterilize over time.
The coating relies on a blend of ionic liquids and copper nanoparticles. Copper possesses a natural affinity for many pathogens, drawing them toward cell walls through electrostatic forces. The copper-based particles then disrupt bacterial structures, showing activity against a range of bacteria, including strains with antibiotic resistance. This approach leverages copper’s inherent antimicrobial properties to create a surface that actively reduces microbial load upon contact.
One of the study’s researchers noted that this development could address persistent disinfection challenges. Modern chlorine-based disinfectants typically require ongoing application, either by trained staff or automated systems. Over time, repeated use of strong chemicals can corrode surface materials, potentially creating microenvironments where pathogens can persist. The new coating proposes a passive, continuous antimicrobial effect that supplements routine cleaning.
Looking ahead, the researchers plan to assess the safety of the new compounds for human exposure, focusing on potential toxicity and allergic responses. Ensuring user safety is a key step before any large-scale deployment in public settings, including schools, hospitals, and transit environments.
Earlier work in the field of antimicrobial coatings includes titanium micro-spike coatings capable of mechanically disrupting pathogenic bacteria. The evolving landscape of surface-embedded antimicrobials reflects ongoing efforts to reduce transmission on frequently touched objects and improve public health outcomes in both Canada and the United States.