Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5358468 | Applied Surface Science | 2010 | 5 Pages |
Using a combination of scanning tunneling microscopy (STM) and density functional theory calculations, we have studied the adsorption of tetracene on the Cu(1Â 1Â 0) (2Â ÃÂ 1)O substrate. At monolayer coverage the adsorbed molecules are in the flat-laying geometry with their long axis along the close-packed [0Â 0Â 1] direction of the substrate and a long-range ordered structure on the length scale up to 100Â nm has been observed. DFT calculation results indicate a stronger interaction between tetracene molecules and Cu(1Â 1Â 0) substrate than Cu(1Â 1Â 0) (2Â ÃÂ 1)O substrate. The preferential adsorption sites have also been pointed out on both substrates. The observed wavelike structure is explained by the interdigitation of C-H bonds of adjacent molecules.