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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Multiphase Growth and Electronic Structure of Ultrathin Hexaazatrinaphthylene on Au(111)
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Multiphase Growth and Electronic Structure of Ultrathin Hexaazatrinaphthylene on Au(111)

机译:超薄六氮杂萘并萘在Au(111)上的多相生长和电子结构

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摘要

Scanning tunneling microscopy was used to study the morphological behavior of 1-2 monolayers (ML) of 5,6,11,12,17,18-hexaazatrinaphthylene (HATNA) deposited on Au(111). The first ML consisted of molecules flat on the surface, arranged in one of three different ordered phases depending on annealing parameters. The second ML assumed an upright orientation and tended to order only if the first layer was disordered. Scanning tunneling spectroscopy of 1-2 ML ordered HATNA was compared to ultraviolet photoemission spectroscopy and inverse photoemission spectroscopy of 80 A amorphous HATNA. There is good agreement between techniques in the transport band gap (~3.80 eV), but the position of the Fermi level in the gap is shifted in the tunneling spectra by about 0.75 eV toward the highest occupied molecular orbital. The shift may be due to morphological effects or degradation from ultraviolet light irradiation.
机译:扫描隧道显微镜用于研究沉积在Au(111)上的5,6,11,12,17,18-六氮杂萘萘的1-2个单层(ML)的形态学行为。第一个ML由平整表面上的分子组成,根据退火参数排列成三个不同有序相之一。第二个ML假定为直立方向,并且仅在第一层无序的情况下才趋于有序。将1-2毫升有序HATNA的扫描隧道光谱与80 A无定形HATNA的紫外光发射光谱和逆光发射光谱进行了比较。传输带隙(〜3.80 eV)之间的技术之间有很好的一致性,但是在隧道中,费米能级的位置在能隙中朝着最高占据分子轨道移动了约0.75 eV。该变化可能是由于形态效应或紫外线照射引起的降解。

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