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首页> 外文期刊>Physical review >Systematic measurement of pentacene assembled on Cu(lll) by bimodal dynamic force microscopy at room temperature
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Systematic measurement of pentacene assembled on Cu(lll) by bimodal dynamic force microscopy at room temperature

机译：室温下双峰动态力显微镜对并五苯在Cu（III）上的系统测量

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摘要

A wide range of depositions of pentacene on a Cu( 111) surface was studied by frequency modulation bimodal dynamic force microscopy at room temperature. The morphologies and stabilities of the pentacene films were systematically studied via detections of the vertical and lateral tip-sample interactions at sub-molecular-scale resolution. At low coverage, pentacene adsorbs flat on the surface where two phases of molecular assemblies were observed. At the boundary between the different phase domains, a large magnitude of the dissipation energy, arising from the high mobility of pentacene, was measured while no significant increase of the dissipation energy was observed at the domain boundary of different orientations in the same phase. By increasing the amount of the deposited molecules, the second layer with the flatly aligned molecule tilted with a longitudinal molecular axis was observed over a small area, but most of the molecules moved to a certain site and formed crystallites with bulk structure on top of the first flat layer. We found that the work function of the bulk surface was strongly affected by the first flat layer.
机译：在室温下，通过频率调制双峰动态力显微镜研究了并五苯在Cu（111）表面的大量沉积。并五苯薄膜的形貌和稳定性是通过检测亚分子尺度分辨率的垂直和横向尖端样品相互作用来系统研究的。在低覆盖率下，并五苯会平整地吸附在观察到两相分子组装体的表面上。在不同相域之间的边界处，测量了并五苯的高迁移率引起的大量耗散能量，而在同一相中不同取向的域边界处未观察到耗散能量的显着增加。通过增加沉积分子的数量，可以在很小的区域内观察到第二层分子，分子的排列方向沿纵向分子轴倾斜，但大多数分子移至某个位置并在其顶部形成了具有块状结构的微晶。第一平面层。我们发现，主体表面的功函数受第一平坦层的强烈影响。

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