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STM images showing the preferential adsorption of (a) FePc and (b) pentacene molecules at fcc sites on the surface. (c) Schematic drawing showing the structures of the two molecules. (d) DFT calculation of the averaged electron density difference along the top–hcp and top–fcc directions. (e) The perspective view of the inhomogeneous lateral dipole moments created by the G/Ru superstructure. (Online version in colour.)
