Almost any surface can be turned into an electricity generator with a thermoelectric paint developed by South Korean researchers, according to a study published in the journal Nature Communications.

The thermoelectric effect is the conversion of temperature differences to electric voltage, or the conversion of an electric current to heat. Paint-like material containing conductive ingredients is not new, but the challenge in making it useful until now is that the device or surface to which it is applied must minimize heat loss in order for an electrical current to be generated, the researchers explained.

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