Fig. 1: Single-molecule junction of DNA zipper.
From: Single-molecule junction spontaneously restored by DNA zipper
a Schematic illustration of the scanning tunnelling microscopy–break-junction (STM-BJ) measurements. b Representative conductance traces for unmodified Au(111) substrate (graydashed lines), and 90-mer and 10-mer DNAs (blue solid lines and purple dotted lines, respectively). c and d 2D histograms of the conductance–displacement (G–z) traces for 90-mer and 10-mer DNAs, respectively. The origin of the displacement was set at the point where the conductance decreased below 50 mG0. 2219 and 2635 traces were analyzed for histograms in c and d, respectively. Tip velocity, 31 nm/s; bias voltage, 20 mV.
