Evolution of the secondary electron cut-off and the occupied molecular orbitals from UPS as C60 (a) and C60F48 (c) are deposited on ZnTPP. The vertical lines mark the secondary electron cut-off and HOMO positions. The energy level diagrams for both interfaces before contact are shown in (b) and (d).
STM images (1 V, 0.1 nA) of (a) 18 nm × 18 nm monolayer of ZnTPP on clean Au(111) and (b) detail 5 nm × 5 nm of ZnTPP self-assembly with unit cell indicating an almost perfectly square unit cell with a = b = 1.4 nm, θ = (88 ± 1)°, δ = (34 ± 1)°, and γ = (66 ± 1)°.
STM image (1 V, 0.2 nA) of 0.2 ML of C60 molecules evaporated on top of a predeposited ZnTPP monolayer on Au(111), showing both C60 single molecules and island formation. The underlying ZnTPP monolayer remains intact and ordered.
STM image (0.7 V, 0.1 nA) of 0.2 ML C60F48 on a full layer of pre-deposited ZnTPP on Au(111). The insets (a)–(c) show examples of C60F48-induced deformation of ZnTPP molecules. For comparison, an undistorted ZnTPP molecule from a self-assembled ML on Au(111) is depicted in (d).
(a) STM image (2 V, 0.1 nA) containing C60F48 on top of single-layer and double-layer ZnTPP. (b) Line profile along the highlighted line in (a) with the zero of the abscissa corresponding to the uppermost end of the line in Fig. 4(c) .
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