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. 2018 Mar 27;8:5222. doi: 10.1038/s41598-018-22893-7

Figure 2.

Figure 2

Experimental data. (a,b) 3D volume plots of conductance obtained by the 3D dynamic probe method shown in Fig. 1 while the STM tip was retracted and made to approach the Au surface, respectively. The x-y cross sections corresponding to the blue arrows in the volume plot (for z = 0.12 nm) and schematic structures of the Au(111) surface are shown together. (c,d) Cross sections of the volume plots along A-B (A’-B’) and C-D (C’-D’) shown in (a,b), respectively. (e,f) G-z curves along I in c and II in d, respectively. Red and black lines show the curves obtained when the STM tip was retracted and made to approach the Au surface, respectively. See supplementary information for more details. (g) Schematic illustration of the junction structure along with the cross section shown in c. r and h indicate the N-Au distance and the height of the N atom in the amine on the STM tip side from the center of the Au atom on the substrate, respectively. (h) Conformation used to determine h (=0.58 nm).