A Molecular Shift Register Based on Electron Transfer

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Science  12 Aug 1988:
Vol. 241, Issue 4867, pp. 817-820
DOI: 10.1126/science.241.4867.817


An electronic shift-register memory at the molecular level is described. The memory elements are based on a chain of electron-transfer molecules and the information is shifted by photoinduced electron-transfer reactions. This device integrates designed electronic molecules onto a very large scale integrated (silicon microelectronic) substrate, providing an example of a "molecular electronic device" that could actually be made. The design requirements for such a device and possible synthetic strategies are discussed. Devices along these lines should have lower energy usage and enhanced storage density.