The past century has been an age of miniaturisation made possible by progress in the design of components, the discovery of semiconductors and the emergence of microelectronics and nanotechnology. The average size of electronic circuits has decreased by 30% every two years over the past few decades. A transistor that measured a few microns in 1970 measures less than hundred nanometres today. Anticipating the limits of silicon technology, molecular electronics is opening up new prospects with the manufacture of nano-objects
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