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The researchers built their transistor with the help of a scanning tunneling microscope. After placing a silicon crystal inside an ultra-high vacuum chamber, they used the microscope to create four phosphorous electrodes and one phosphorus transistor atop the silicon. Then they covered this with a layer of non-reactive hydrogen, and after removing a few of the hydrogen atoms with the metal tip of the microscope, they used phosphine gas to insert the phosphorous into the silicon. The whole system was then encased in another silicon layer and electrically connected to the outside world.
Originally posted by TrueBrit
reply to post by wmd_2008
My thoughts exactly. It may be as impressive as a molecular computer, but it cannot by definition, be called a single atom transistor.