Bond-Level Imaging of the 3D Conformation of Adsorbed Organic Molecules Using Atomic Force Microscopy with Simultaneous Tunneling Feedback.
Bond-Level Imaging of the 3D Conformation of Adsorbed Organic Molecules Using Atomic Force Microscopy with Simultaneous Tunneling Feedback.
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DOI：
10.1103/physrevlett.122.196101
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发表时间：
2019-05
影响因子：
8.6
通讯作者：
D. Martin-Jimenez;Sebastian Ahles;Doreen Mollenhauer;Hermann A. Wegner;A. Schirmeisen;D. Ebeling
中科院分区：
文献类型：
--
作者：
D. Martin-Jimenez;Sebastian Ahles;Doreen Mollenhauer;Hermann A. Wegner;A. Schirmeisen;D. Ebeling
表面上分子的化学结构和取向可以使用具有CO官能化尖端的低温原子力显微镜来可视化。传统上，这是在恒定高度模式下通过测量振荡力传感器的频移来完成的。然而，这种方法不适合分析3D对象。我们使用隧道电流来跟踪地形，同时从频移信号获得亚分子分辨率。由此，可以可靠地确定3D分子的构象和原子晶格上的吸附位点。
The chemical structure and orientation of molecules on surfaces can be visualized using low temperature atomic force microscopy with CO-functionalized tips. Conventionally, this is done in constant-height mode by measuring the frequency shift of the oscillating force sensor. However, this method is unsuitable for analyzing 3D objects. We are using the tunneling current to track the topography while simultaneously obtaining submolecular resolution from the frequency shift signal. Thereby, the conformation of 3D molecules and the adsorption sites on the atomic lattice can be reliably determined.