Probing the conformation of physisorbed molecules at the atomic scale using STM manipulation.
Probing the conformation of physisorbed molecules at the atomic scale using STM manipulation.
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DOI：
10.1021/nl048367f
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发表时间：
2005
期刊：
影响因子：
10.8
通讯作者：
K. Braun;S. Hla
中科院分区：
文献类型：
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作者：
K. Braun;S. Hla
利用扫描隧道显微镜（STM）和密度泛函理论（DFT）计算，研究了6 K时六联苯分子在Ag（111）表面的物理吸附结构.分子表面原子注册表精确地确定通过使用原子标记和sexipenyl官能化的提示。计算证实了六苯基π环在Ag（111）上的交替扭曲。π环扭转角11.4度直接由STM操作的几何形状确定。这项创新的实验开辟了STM操作的新应用，以探测原子水平上表面上“物理吸附”物种的性质。
We use scanning tunneling microscope (STM) manipulation and density functional theory calculation to investigate the structural properties of individual sexiphenyl molecules physisorbed on a Ag(111) surface at 6 K. The molecule-surface atomic registry is precisely determined by using atomic markers and a sexiphenyl functionalized tip. The calculations confirm the alternating twist of the sexiphenyl pi-rings on Ag(111). The pi-ring torsional angle, 11.4 degrees, is directly determined from the geometry of STM manipulation. This innovative experiment opens up a novel application of STM manipulation to probe the properties of "physisorbed" species on surfaces at the atomic level.