Two artificial cells that can act as a tiny battery (Credit: NIST)
Synthetic cells that act as a battery could one day be used to power nanotech devices. Scientists from Yale University and the National Institute of Standards and Technology (NIST) created a very simple cell model in order to study the way certain real cells generate electric voltages. In the process they produced a minute working battery that converts chemical energy into electrical energy at an efficiency of about 10 per cent - a figure that's high enough to make cell batteries a practical alternative as a nano power source.
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