We often talk about electrons “flowing” through materials, but in fact, they do not usually flow like a fluid. Such “hydrodynamic” electron flow had long been predicted but only now conceived for the first time. Scientists from the Weizmann Institute of Science in Israel have recently managed electrons flowing viscously through a nanodevice, just like water in household pipes leading to a shower or kitchen sink. This unusual new behavior for electrons has significant implications for future electronic devices including low-power ones in which hydrodynamic flow lowers the electrical resistance.
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