题目：

Picene thin films on metal surfaces:Impact of molecular shape on interfacial coupling

作者：

Qi Wang¹, Qian Xin², Rong-Bin Wang^1,3, Martin Oehzelt⁴, Nobuo Ueno⁵, Satoshi Kera^*,5,6, and Steffen Duhm^**,1

单位：

¹ Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based FunctionalMaterials & Devices, Soochow University, Suzhou 215123, P.R. China

² School of Physics, Shandong University, Jinan 250100, P.R. China

³Institut fur Physik, Humboldt-Universitat zu Berlin, 12489 Berlin, Germany

⁴ Helmholtz Zentrum Berlin fur Materialien und Energie, 12489 Berlin, Germany

⁵ Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan

⁶Department of Photo-Molecular Science, Institute for Molecular Science, Okazaki 444-8585, Japan

摘要：

The energetics at organic-metal interfaces are, to large extend, determined by the structure of the molecular adsorbate on the substrate surface. As shown by low-energy electron diffraction (LEED) the zigzag shape of picene leads to a peculiarmonolayerstructure on Ag(111), Ag(110), and Cu(111) with one moleculein the unit cell lying essentially flat and the other one adopting an edge-on orientation. The adsorbate-substrate coupling is weak as shown by ultraviolet photoelectron spectroscopy (UPS). This is in striking contrast to monolayers of straight pentacene, where all molecules lie flat and are strongly coupled, involving chargetransfer complex formation on most of these surfaces.The peculiar packing structure of picene leads to weak interfacial coupling on clean metal surfaces. In contrast, pentacene is chemisorbed on Ag and Cu surfaces involvingelectron transfer from the substrate.

影响因子：

2.578

分区情况：

二区

链接：

http://sci-hub.cc/10.1002/pssr.201700012

责任编辑：向丹婷  联系方式：dtxiang@suda.edu.cn