Promising antibacterial coating created from green tea and salt
http://www.gizmag.com/polyphenol-antibacterial-coating/28792/

Researchers at Northwestern University have discovered new ways of utilizing the properties of naturally occurring polyphenols found in green tea, red wine and dark chocolate. Dissolving polyphenol powders in water with a small amount of salt instantly produces transparent coatings that kill bacteria on contact, have antioxidant qualities and are non-toxic. The sticky nature of polyphenols and the low cost of materials could open the door to a wide range of uses for these coatings.

Apparently the coatings can stick to virtually any surface, even Teflon, and are only 20 to 100 nanometers thick, potentially making them ideal for use in a whole range products.

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