Wegner Daniel, Yamachika Ryan, Wang Yayu, Brar Victor W, Bartlett Bart M, Long Jeffrey R, Crommie Michael F
Department of Physics, University of California, Lawrence Berkeley National Laboratory, Berkeley, California 94720-7300, USA.
Nano Lett. 2008 Jan;8(1):131-5. doi: 10.1021/nl072217y. Epub 2007 Dec 11.
We have studied the structural and electronic properties of tetracyanoethylene (TCNE) molecules on different noble-metal surfaces using scanning tunneling spectroscopy and density functional theory. Striking differences are observed in the TCNE behavior on Au, Ag, and Cu substrates in the submonolayer limit. We explain our findings by a combination of charge-transfer and lattice-matching properties for TCNE across substrates that results in a strong variation of molecule-molecule and molecule-substrate interactions. These results have significant implications for future organic/inorganic nanoscopic devices incorporating molecule-based magnetism.
我们使用扫描隧道光谱和密度泛函理论研究了四氰基乙烯（TCNE）分子在不同贵金属表面的结构和电子性质。在亚单层极限下，观察到TCNE在金、银和铜衬底上的行为存在显著差异。我们通过结合TCNE在不同衬底上的电荷转移和晶格匹配特性来解释我们的发现，这导致了分子 - 分子和分子 - 衬底相互作用的强烈变化。这些结果对未来包含分子基磁性的有机/无机纳米器件具有重要意义。
