Biological Nanobatteries

Engadget:<blockquote>NASA researchers working on biological nanobattery. The idea is to make use of the iron-containing protein ferritin, which apparently has the innate ability to carry either a positive or negative charge. In practice, one layer of ferritin would simply be stacked with another layer carrying the opposite charge, effectively forming a battery just a few nanometers thick</blockquote>

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