Fig. 5: Interlayer [4 + 2] cycloaddition between C60 and BCPM on Au(111).
From: Extending on-surface synthesis from 2D to 3D by cycloaddition with C60
a Large-scale STM image after annealing the C60-on-BCPM network at 370 K for 30 min, showing two types of territories where D1 is the regular and bright domain outlined by the cyan dashed line and D2 represents the dark and less ordered section (Vs = −1250 mV, It = −0.28 nA). b Linescan across the two territories marked by the blue arrow in panel a, showing a height difference of 3.5 Å (Vs = −1250 mV, It = −0.28 nA). c High-resolution STM image of D1, showing the intramolecular structure of C60. d Top and side views of the structural model of C60-BCPM and pristine C60 (grey) on Au(111), showing the height difference consistent with the linescan. e The calculated STM image and (f) structural model of the close-packed C60-BCPM structure, i.e., D1, on Au(111), where the top [6,6] bonds highlighted in purple correspond to the observed triangle-shaped intramolecular feature.
