Department of Physics, Budapest University of Technology and Economics and MTA-BME Condensed Matter Research Group, 1111 Budapest, Budafoki ut 8., Hungary.
Department of Applied Physics, Columbia University, New York, NY 10027, USA.
Nanoscale. 2018 Feb 15;10(7):3362-3368. doi: 10.1039/c7nr08354h.
Break-junction measurements are typically aimed at characterizing electronic properties of single molecules bound between two metal electrodes. Although these measurements have provided structure-function relationships for such devices, there is little work that studies the impact of molecule-molecule interactions on junction characteristics. Here, we use a scanning tunneling microscope based break-junction technique to study pi-stacked dimer junctions formed with two amine-terminated conjugated molecules. We show that the conductance, force and flicker noise of such dimers differ dramatically when compared with the corresponding monomer junctions and discuss the implications of these results on intra- and inter-molecular charge transport.
断键测量通常旨在表征结合在两个金属电极之间的单个分子的电子性质。尽管这些测量为这类器件提供了结构-功能关系，但很少有研究分子间相互作用对结特性影响的工作。在这里，我们使用基于扫描隧道显微镜的断键技术研究了由两个胺端接的共轭分子形成的π堆积二聚体结。我们表明，与相应的单体结相比，这种二聚体的电导、力和闪烁噪声有很大的差异，并讨论了这些结果对分子内和分子间电荷输运的影响。
