27 Aug '14, 3pm

How Scientists Generate Electricity from a Silk Moth Cocoon

How Scientists Generate Electricity from a Silk Moth Cocoon

Wetting the cocoon makes the trace elements in a silk moth cocoon form mobile charge-carrying ions, producing an electric current across the cocoon membrane. The researchers used this current to light an LED. They attached an aluminum electrode to the inner surface of a cocoon and a copper electrode to the outer surface, and exposed the cocoon to water vapor. Three such cocoons were connected in series to light an LED. The researchers also charged a moist silk cocoon with a direct current source to see if it was capable of acting as a capacitor — a device that stores charge. The study shows that it could power an LED for two to three minutes after the direct current was removed.

Full article: http://inhabitat.com/how-scientists-generate-electricity-...

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