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(a) Chemical structures for the molecular rectifier design (molecule (1)), along with two modified designs, (2) and (3): The stilbene molecular backbone with a single methylsulfide linker at the 4 position and a covalent gold-carbon bond at the 4′ position (molecule 1); (b) Log-binned conductance histograms for the three molecules; (c) Rectification ratio as a function of bias voltage [42].
