STM study of di-indenoperylene molecules on Cu(1 0 0) surfaces: Mobility, stability and epitaxy |
| |
Authors: | Xue Na Zhang Dimas G de Oteyza Yutaka Wakayama Helmut Dosch |
| |
Institution: | aMax-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany;bAdvanced Electronic Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan;cDonostia International Physics Center, Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain;dInstitut für Theoretische und Angewandte Physik, Universität Stuttgart, 70550 Stuttgart, Germany |
| |
Abstract: | We report a detailed study of the self-assembly process of di-indenoperylene (DIP) on Cu(1 0 0) surfaces, investigated by variable temperature scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV) conditions. During the initial growth stages a preferred nucleation at the step edges is revealed. Subsequently, large ordered 2D islands grow from the step edges, while smaller 2D islands form on the terrace sites. The equilibrium fluctuation of these 2D clusters has been monitored in real-time, thereby obtaining a direct insight into the temperature dependence of the molecular surface diffusion. The substrate–adsorbate interactions determine the azimuthal molecular orientation, finally lead to the formation of highly ordered chiral domains which are commensurate with the substrate. |
| |
Keywords: | STM Self-assembly Epitaxy |
本文献已被 ScienceDirect 等数据库收录! |
|