Light accelerates conductivity in nature's 'electric grid' yale NatureComms
The natural world possesses its own intrinsic electrical grid composed of a global web of tiny bacteria-generated nanowires in the soil and oceans that"breathe" by exhaling excess electrons.is a surprising ally in fostering this electronic activity within biofilm bacteria. Exposing bacteria-produced nanowires to light, they found, yielded an up to a 100-fold increase in electrical conductivity.
The results could provide new insights as scientists pursue ways to exploit this hidden electrical current for a variety of purposes, from eliminating biohazard waste and creating new renewable fuel sources. Almost all living things breathe oxygen to get rid of excess electrons when converting nutrients into energy. Without access to oxygen, however, soil bacteria living deep under oceans or buried underground over billions of years have developed a way to respire by"breathing minerals," like snorkeling, through tiny protein filaments called nanowires.
When bacteria were exposed to light, the increase in electrical current surprised researchers because most of the bacteria tested exist deep in the soil, far from the reach of light. Previous studies had shown that when exposed to light nanowire-producing bacteria grew faster.
"It is a completely different form of photosynthesis," Malvankar said."Here, light is accelerating breathing byMalvankar's lab is exploring how this insight into bacterial
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