Tech Update : A Single Atom Transistor

Researchers in Australia,south Korea and U.S have created a working transistor out of a single phosphorous atom embedded in silicon. They used a scanning tunneling microscope and a technique common in lithography to replace one silicon atom in a six-atom lattice with a phosphorous atom. When they applied a voltage across the phosphorous atom , it behaved like a transistor , switching and amplifying an electric current.

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