(Business 2.0) – At last, a reason to toss out that musty box of Arm & Hammer. In 2004, Samsung equipped its newest line of refrigerators with an interior coating of nanoscale silver particles—known to be a natural enemy of bacteria. The particles wipe out germs, fungi, and rank odors. Silver Nano technology is now standard in all Samsung fridges, which start at $799; the electronics maker will soon roll it out in air conditioners and washing machines. — ELIZABETH ESFAHANI