Engineers at the University of Massachusetts Amherst have developed a technique for harvesting electricity from air humidity, dubbed the “generic Air-gen effect.” According to research published in Advanced Materials, any material with nanopores less than 100 nanometers in diameter can be utilized to continuously generate electricity.

https://scitechdaily.com/clean-energy-24-7-engineers-use-nanotechnology-to-harvest-electricity-from-thin-air/