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STM image of perylene on Ru(0001) at a coverage of about 1 monolayer, the magnified insets reveal, (A) the atomically resolved disordered phase, and (B) the ordered phase with a superstructure, the image was taken at and .
High-resolution STM images show (a) molecular distribution, , , and (b) intermolecular details, , , in the disordered phase. The inset in (b) is the enlarged STM image of area indicated by a rectangular shape taken subsequently.
High-resolution STM images demonstrate the superstructure in the ordered region, (a) image taken at a tunneling condition of and , the unit cell is indicated by a rhombic shape, and (b) the structure of the substrate Ru(0001) observed at a tunneling condition of (near the Fermi level) and .
A real space model for the superstructure in the ordered phase, the unit cell, indicated by a rhombic shape, shows a Ru(0001)--8 perylene symmetry.
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