The Journal of Chemical Physics 144, 194703 (2016); doi: 10.1063/1.4949765
FIG. 2. Model of 8T and 7T molecules from Fig. 1 matched to the Au(111) surface lattice. ((a)-(d)) STM images [set point 100 mV, 5 pA] of sub-areas from Figs. 1(a)-1(c). ((e)-(h)) Models of oligothiophene molecules from (a)-(d) overlaid on the Au(111) lattice. Crystallographic directions are indi- cated. Black dashed circles indicate the van der Waals radii of the hydrogen atoms. Red dashed circles for the highlighted molecules indicate S atoms on or near Au top-sites (as opposed to bridging or hollow sites).