Hexa-peri-hexabenzocoronene on Ag(111): Monolayer/multilayer transition of molecular orientation and electronic structure

Glowatzki H; Gavrila GN; Seifert S; Johnson RL; Rader J; Mullen K; Zahn DRT; Rabe JP; Koch N

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Hexa-peri-hexabenzocoronene on Ag(111): Monolayer/multilayer transition of molecular orientation and electronic structure

机译：Ag（111）上的六-peri-hexabenzocoronene：分子取向和电子结构的单层/多层过渡

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The molecular orientation and electronic structure of hexa-peri-hexabenzocoronene (HBC) deposited on Ag(111) was investigated in the mono- and multilayer regime by near edge X-ray absorption fine structure spectroscopy (NEXAFS), scanning tunneling and scanning force microscopy (STM and SFM), and ultraviolet photoelectron spectroscopy (UPS). We found that the molecular orientation changed as a function of coverage, exhibiting a transition from flat lying HBC in the monolayer to molecules being 43 degrees inclined relative to the substrate plane in the multilayer. This structural transition was accompanied by a rigid shift of molecular energy levels by 0.3 eV toward higher binding energy between mono- and multilayer. In addition, broadening of the highest molecular levels by ca. 0.35 eV was observed in the multilayer, suggesting the formation of extended intermolecular energy bands.

机译：通过近边缘X射线吸收精细结构光谱法（NEXAFS），扫描隧道效应和扫描力显微镜研究了单层和多层结构中沉积在Ag（111）上的六-peri-六苯并二氢呋喃（HBC）的分子取向和电子结构。（STM和SFM）和紫外光电子能谱（UPS）。我们发现分子取向随覆盖率的变化而变化，表现出从单层平躺的HBC到相对于多层中的基材平面倾斜43度的分子的过渡。这种结构转变伴随着分子能级的刚性移动，向着单分子和多层分子之间更高的结合能移动了0.3 eV。此外，最高分子水平的扩展范围约为。在多层中观察到0.35 eV，表明形成了延伸的分子间能带。

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《The journal of physical chemistry, C. Nanomaterials and interfaces》 |2008年第5期|共5页
作者
Glowatzki H; Gavrila GN; Seifert S; Johnson RL; Rader J; Mullen K; Zahn DRT; Rabe JP; Koch N;
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正文语种 eng
中图分类特种结构材料;表面现象的物理化学;
关键词
POLYCYCLIC AROMATIC-HYDROCARBONS; THIN-FILMS; SPECTROSCOPY; PENTACENE; NEXAFS; MORPHOLOGY; RESOLUTION; GROWTH; STM;

机译：多环芳烃;薄膜;光谱学;并五苯;正畸;形态学;分辨率;生长;STM;

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1. Hexa-peri-hexabenzocoronene on Ag(111): Monolayer/multilayer transition of molecular orientation and electronic structure [J] . Glowatzki H, Gavrila GN, Seifert S, The journal of physical chemistry, C. Nanomaterials and interfaces . 2008,第5期

机译：Ag（111）上的六-peri-hexabenzocoronene：分子取向和电子结构的单层/多层过渡
2. Comparative Study of Tetrahydrothiophene and Thiophene Self-Assembled Monolayers on Au(111): Structure and Molecular Orientation [J] . Eisuke Ito, Masahiko Hara, Kaname Kanai Bulletin of the Korean Chemical Society . 2009,第8期

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Hexa-peri-hexabenzocoronene on Ag(111): Monolayer/multilayer transition of molecular orientation and electronic structure

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