Fig. 2.

Single [123]tetramantane molecules on a Cu(111) surface. a Images obtained in STM scan mode. b–d Images obtained by constant height AFM scans. Parameters: a U = 200 mV, I = 10 pA, b–d U = −0.5 mV, Δz = 170 pm (b), 160 pm (c), 150 pm (d), respectively. Scale bars: a 0.5 nm, b–c 0.3 nm