Atomic Force Microscopy Reveals Bistable Configurations of Dibenzo[a,h]thianthrene and their Interconversion Pathway
Atomic Force Microscopy Reveals Bistable Configurations of Dibenzo[a,h]thianthrene and their Interconversion Pathway
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DOI：
10.1103/physrevlett.108.086101
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发表时间：
2012-02-23
影响因子：
8.6
通讯作者：
Repp, Jascha
中科院分区：
文献类型：
--
作者：
Pavlicek, Niko;Fleury, Benoit;Repp, Jascha
利用低温扫描隧道和原子力显微镜研究了二苯并[a，h]噻蒽分子吸附在氯化钠表面的行为。存在两种稳定构型，对应于自由非平面分子的不同异构体。通过非弹性电子隧穿的激发，我们可以在两种构型之间切换。具有亚分子分辨率的原子力显微镜可以明确地确定分子几何形状和异构体相互转化的途径。我们的研究也为扫描隧道显微镜的对比机制提供了新的思路。
We investigated dibenzo[a,h] thianthrene molecules adsorbed on ultrathin layers of NaCl using a combined low-temperature scanning tunneling and atomic force microscope. Two stable configurations exist corresponding to different isomers of free nonplanar molecules. By means of excitations from inelastic electron tunneling we can switch between both configurations. Atomic force microscopy with submolecular resolution allows unambiguous determination of the molecular geometry, and the pathway of the interconversion of the isomers. Our investigations also shed new light on contrast mechanisms in scanning tunneling microscopy.