http://luciano.stanford.edu/~shimbo/set.html http://luciano.stanford.edu/~shimbo/set.html http://en.wikipedia.org/wiki/Coulomb_blockade#Single_electron_transist

http://luciano.stanford.edu/~shimbo/set.html http://luciano.stanford.edu/~shimbo/set.html http://en.wikipedia.org/wiki/Coulomb_blockade#Single_electron_transistor http://en.wikipedia.org/wiki/Coulomb_blockade#Single_electro... Looking at the pictures, these devices are not made from single atoms. They consist of multiple atoms but only require a few electrons to function.