Corannulene (C20H10, COR), a fragment of C60, has received a lot of academic interest due to its bowl-like stereo structure and its unique aromatic property. The assembly behaviors of COR on various metal surfaces with high coverage (monolayer) have been investigated, however, low coverage assembly are not explored. Using scanning tunneling microscopy (STM), here we report that highly dispersed superstructures of corannulene are found on Au(111)/ Ag(111)/ Cu(111) surface with low coverage which are mediated by substrate surface-state electrons. What's more, the separations of nearest neighbor molecules match distance of half-multiples of the Fermi wavelength of the metal. When dosing more COR on Au(111)/ Ag(111), a 2 nm wide stripe pattern which is stabilized by dipole-dipole interaction is formed with COR pointing up in the middle and COR pointing down on two sides which does not exist on Cu(111) due to its high activity. The distance between the stripe also favors half-multiples of the Fermi wavelength of the substrate which imply long-range electronic interactions.

Long range interaction between corannulene molecules on (111) surface of noble metals

256th National Meeting (2018)

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