Novel growth of naphthalene overlayer on Cu(111) studied by STM, LEED, and 2PPE

Takashi Yamada, Masahiro Shibuta, Yohei Ami, Yasuhiro Takano, Akihiro Nonaka, Keisuke Miyakubo, Toshiaki Munakata

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31 Citations (Scopus)


Adsorbed structures of naphthalene on Cu(111) have been studied using low temperature scanning tunneling microscope (LT-STM) and low energy electron diffraction (LEED). Starting from single molecules, three kinds of long-range ordered superstructures, (5√3 - 5√3)R30°, (2√3 - 3)rect-1C10H8, and (-411-4) are observed depending on the molecular concentrations and the substrate temperatures during molecular adsorption. One of the self-assembled ordered phases with a (5√3 - 5√3) R30° periodicity is chiral in adsorption-induced arrangement though a single naphthalene molecule itself has no inherent chirality. In STM images, isolated single molecules appear as depressions whereas the molecules are seen as protrusions in self-assembled layers. Coverage dependent two-photon photoemission (2PPE) spectra show that the adsorption-induced occupied states is formed at around Cu 3d bands, and this results in the enhanced tunneling of occupied state images in assembled layers.

Original languageEnglish
Pages (from-to)13334-13339
Number of pages6
JournalJournal of Physical Chemistry C
Issue number31
Publication statusPublished - 2010 Aug 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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