Herringbone Reconstruction-Mediated assembly of 2-(Hydroxymethyl)benzimidazole molecules on Au(111) studied by scanning tunneling microscope

摘要

Here we use scanning tunneling microscopy to study the self-assembly of 2-(hydroxymethyl)benzimidazole (HMBI) molecules and the thermal stability of the assemblies on the herringbone structure of a reconstructed Au (111) surface. Our observations indicate that hydrogen-bond interactions between HMBI molecules and the molecule-substrate interaction collectively determine the arrangement of the molecules on the surface. After annealing, the molecules can dehydrogenate and form molecule-metal coordinated structures. We also observe that the herringbones from the substrate are expanded in hydrogen-bonded film but compressed in metal coordinated structures compared with that of the native Au(111) surface, demonstrating a mutual influence between adsorbate and substrate.

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