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Low-cost, 'Green' Way To Make Antimicrobial
ScienceDaily (Jan. 24, 2008)
-- Researchers at The City College of New York (CCNY) and Rice University have developed a low-cost,
environmentally friendly technique for embedding antimicrobial silver nanoparticles into vegetable oil-based
paints. The method, to be reported in the March issue (online January 20) of Nature Materials, could give
homes and workplaces a new defense against germs by applying a fresh coat of paint.
Silver's antibacterial properties have been known for thousands of years, and silver nanoparticles offer
superior antibacterial activity while being non-toxic. However, coatings containing antimicrobial agents have
failed commercially in the past due to their complex, multi-step preparation methods and high cost of
The CCNY/Rice team developed a "green chemistry" approach to synthesize metal nanoparticles in common
household paints in situ without using hazardous reagents and solvents. "We extensively worked on
poly-unsaturated hydrocarbon chain containing polymers/oils to devise a novel approach to nanoparticle
formation" said Dr. George John, Professor of Chemistry at CCNY and lead author of the article.