—How Nanosilver Zaps Germs “Antimicrobials: Ions, not nanoparticles, are the killers” Curious germophobes can rejoice: Researchers have figured out how silver nanoparticles, found in many consumer products, kill bacteria. The culprits are the silver ions the nanoparticles emit, not nanoparticle-specific biological effects (Nano Lett., DOI: 10.1021/nl301934w). Manufacturers add silver nanoparticles to cosmetics and clothing to kill germs. Yet debate rages about how they work. When exposed to air in an aqueous solution, silver nanoparticles release silver ions, which have known antibacterial properties. Researchers have been unable to rule out a role for the nanoparticles themselves.
by Carmen Drahl |
July 18, 2012