Novel Growth of Naphthalene Overlayer on Cu(111) Studied by STM, LEED, and 2PPE

被引：31

作者：

Yamada, Takashi ^{[1
]}

Shibuta, Masahiro ^{[1
]}

Ami, Yohei ^{[1
]}

Takano, Yasuhiro ^{[1
]}

Nonaka, Akihiro ^{[1
]}

Miyakubo, Keisuke ^{[1
]}

Munakata, Toshiaki ^{[1
]}

机构：

[1] Osaka Univ, Dept Chem, Grad Sch Sci, Osaka 5600043, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 31期

关键词：

SCANNING-TUNNELING-MICROSCOPY; CHIRAL-SYMMETRY BREAKING; ELECTRONIC-STRUCTURE; AROMATIC-MOLECULES; METAL-SURFACES; BENZENE; ADSORPTION; DYNAMICS; PT(111); NANOSTRUCTURES;

D O I：

10.1021/jp1045194

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 root 3 x 5 root 3)R30 degrees, (2 root 3 x 3)rect-1C(10)H(8), and (-4 1 1 -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 root 3 x 5 root 3) R30 degrees 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

引用

页码：13334 / 13339

页数：6

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