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作 者:Sabine-Antonia Savu Sabine Abb Simon Schundelmeier Jonathan D. Saathoff James M. Stevenson Christina Tonshoff Holger F. Bettinger Paulette Clancy M. Benedetta Casu Thomas Chasse
机构地区:[1]Institute of Physical and Theoretical Chemistry, University of Tuebingen, Aufder Morgenstelle 18, 72076 Tuebingen, Germany [2]School of Chemical and Biomolecular Engineering, Cornel/University, Ithaca, New York 14853, USA [3]Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany
出 处:《Nano Research》2013年第6期449-459,共11页纳米研究(英文版)
摘 要:We investigate nanorod assemblies of two 64-substituted pentacenes, namely (2,3-X2-9,10-Y2)-substituted pentacenes with X -- Y = OCH3 (MOP) and with X = F, Y-- OCH3 (MOPF), grown on Au(111) single crystals. By using a multi-technique approach based on ultraviolet photoelectron spectroscopy X-ray photoelectron spectroscopy; and X-ray absorption, we find evidence for charge transfer screening at the interface with gold. Furthermore, the MOP and MOPF nanorods show a rough surface morphology, which was investigated with atomic force microscopy. We use molecular simulation techniques to investigate the energetic barriers to diffusion and to traverse step-edges to estimate their influence on the nanorod roughness. We find that barriers to surface diffusion on a terrace are anisotropic and that their direction favors the formation of nanorods in these materials.我们调查二 4 代用品 pentacenes 的 nanorod 集会,也就是(2,3-X 2-9,10-Y 2 ) 有 X = Y = OCH3 (拖把) 并且与 X = F 的代替的 pentacenes, Y = OCH3 (MOPF ) ,在 Au (111 ) 上成年单个晶体。由基于紫外光电子光谱学, X 光检查光电子光谱学,和 X 光检查吸收使用一条多技术途径,我们为在黄金的接口屏蔽的起诉转移发现证据。而且, MOP 和 MOPF nanorods 显示出不平的表面形态学,它与原子力量显微镜学被调查。我们使用分子的模拟技术调查精力充沛的障碍到散开并且穿越步边在 nanorod 粗糙上估计他们的影响。我们发现对一个平台上的表面散开的障碍是各向异性的并且他们的方向在这些材料赞成 nanorods 的形成。
关 键 词:nanorod assembly substituted pentacene electronic structures/ processes/mechanisms organic electronics charge transfer diffusion and step-edge barrier
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