Conformation-induced self-assembly of rubrene on Au(111) surface

Li Wang; Huihui Kong; Xiu Chen; Xinli Du; Feng Chen; Xiaoqing Liu; Hongming Wang
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p093102
Academic Journal
Large -area well-ordered monolayer of rubrene has been fabricated on Au(111) surface by gradually annealing a multilayer of rubrene in vacuum. Scanning tunneling microscopy clearly demonstrates that the rubrene monolayer experiences a disorder-order transition with increase of the annealing temperature and the molecules form dimer rows with opposite directions for two neighbored rows. The π-π and π-H interactions between the molecules induced by conformation of the molecules in monolayer account for the main driving forces to form this kind of ordered layer.


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