One electron, two electrons, three...

Some physicists from Goteborg (Sweden) have counted their electrons individually. Tunnel connections have been established in a single dimensional aluminum chain, separated by an insulating layer on the connections, and electrons pass from one island to another by tunnel effect. To perform the count they have used a special transistor.

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Eusko Jaurlaritzako Industria, Merkataritza eta Turismo Saila