Orientationally ordered (7x7) superstructure of C60 on au(111)
Orientationally ordered (7x7) superstructure of C60 on au(111)
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DOI：
10.1103/physrevlett.99.226105
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发表时间：
2007-11-30
影响因子：
8.6
通讯作者：
Berndt, R.
中科院分区：
文献类型：
--
作者：
Schull, G.;Berndt, R.
用低温扫描隧道显微镜观察了C（60）在Au（111）表面单分子膜中的长程取向有序。发现了一个由49个分子组成的具有11种不同取向的单胞，它可以被分为有缺陷的和无缺陷的两半，类似于Si（111）的（7 × 7）重构。提出了一个模型，它显示了如何通过莫尔效应，基板诱导微小的变化，在C（60）分子的取向。分子间的相互作用在稳定超晶格中起着重要的作用。
Long range orientational order within C(60) monolayers on Au(111) is observed with low-temperature scanning tunneling microscopy. A unit cell comprised of 49 molecules which adopt 11 different orientations is found. It can be divided in a faulted and an unfaulted half similar to the (7x7) reconstruction of Si(111). A model is proposed which shows how, through a Moire-like effect, the substrate induces minute changes in the orientation of the C(60) molecules. Intermolecular interactions are shown to play a major role in stabilizing the superlattice.