A system to demonstrate the bistability in molecules for application in a molecular QCA cell

We present a system to test the bistability of individual molecules for application in a QCA cell. The system presented consists of two polysilicon gate electrodes which sit adjacent to two highly-doped windows of silicon to which molecules can be bound. To enable the detection of switching activity the two highly doped regions are electrically connected to the island of a single-electron transistor (SET) which serves as an electrometer. Using this design we facilitate a differential measurement approach where a single molecular switching event should be seen in the conductance of the SET.