arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.0306cond-mat.mtrl-sci
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分子间相互作用的表面态工程

Surface state engineering of molecule-molecule interactions

Geoffrey Rojas, Xumin Chen, Donna Kunkel, Justin Nitz, Jie Xiao, Peter A. Dowben, Scott Simpson, Eva Zurek, Axel Enders

摘要:

通过界面操作,特别是界面偶极和载流子注入的势垒来设计有机物的电子结构,对于改进有机器件是至关重要的。这需要通过精确控制分子之间的相互作用来精细地制造所需的有机结构。有机配位化学的基本原理不能在不考虑界面处的分子杂化、电荷转移和偶极形成的情况下应用。在这里,我们确定的能级排列,电荷转移,表面偶极子和电荷枕效应之间的相互作用,并显示这些影响如何共同决定吸附卟啉2 H-TPP之间的净力Cu(111)。我们表明,支持卟啉之间的力可以改变通过控制跨界面的电荷转移量准确地通过相对于金属衬底的肖克利表面状态的分子电子能级的相对对齐,从而管理的分子的自组装。

英文摘要:

Engineering the electronic structure of organics through interface manipulation, particularly the interface dipole and the barriers to charge carrier injection, is of essential importance to improved organic devices. This requires the meticulous fabrication of desired organic structures by precisely controlling the interactions between molecules. The well-known principles of organic coordination chemistry cannot be applied without proper consideration of extra molecular hybridization, charge transer and dipole formation at the interfaces. Here we identify the interplay between energy level alignment, charge transfer, surface dipole and charge pillow effect and show how these effects collectively determine the net force between adsorbed porphyrin 2H-TPP on Cu(111). We show that the forces between supported porphyrins can be altered by controlling the amount of charge transferred across the interface accurately through the relative alignment of molecular electronic levels with respect to the Shockley surface state of the metal substrate, and hence govern the self-assembly of the molecules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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