Algae as a source for electricity

Posted On: April 20, 2010

In an electrifying first, Stanford scientists have plugged into algae cells and harnessed a tiny electrical current. They found it at the very source of energy production – photosynthesis, a plant’s method of converting sunlight to chemical energy. It may be a first step toward generating high-efficiency bioelectricity that doesn’t give off carbon dioxide as a byproduct, the researchers say.

“We believe we are the first to extract electrons out of living plant cells,” said WonHyoung Ryu, the lead author of the paper published in the March issue of Nano Letters. Ryu conducted the experiments while he was a research associate for mechanical engineering Professor Fritz Prinz.

The Stanford research team developed a unique, ultra-sharp nanoelectrode made of gold, specially designed for probing inside cells. They gently pushed it through the algal cell membranes, which sealed around it, and the cell stayed alive. From the photosynthesizing cells, the electrode collected electrons that had been energized by light and the researchers generated a tiny electrical current.

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