Scientists from Caltech and Northwestern University have found a way to generate electricity by combining saltwater with one of life's more undesirable compounds: rust.

The phenomenon discovered by Tom Miller, Caltech professor of chemistry, and Franz Geiger, Dow Professor of Chemistry at Northwestern, converts the kinetic energy of flowing droplets into current.

After running saltwater of varying concentrations over their rust-coated iron, the duo generated several tens of millivolts and several microamps per cm2.

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This week's Question: Do you see potential with electrokinetic power?

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