Observation of Electronic States in Molecular Devices under Operative Conditions

分子器件的电子态不仅要受到与金属电极的相互作用的扰动，而且要受到操作中感应电荷和/或外加偏置的扰动。在这项研究中，我们试图直接观察分子在操作条件下的电子态，以加深对其电学性质的了解。利用荧光产额X射线吸收光谱，连续测量了分子薄膜的光谱随外加偏压的变化。在分析结果的基础上，制备了由不同电性基团组成的功能性自组装单分子膜，并对其电子态进行了实验表征。通过这项研究，获得了一种新型单分子器件的设计。

The electronic states of the molecular devices should be perturbed by not only the interactions with the metal electrode but also the induced charge and/or the applied bias in the operation. In this study, we attempted the direct observation of the electronic states of molecules under the operative conditions, for deep understanding of its electric properties. Using a fluorescence-yield x-ray absorption spectroscopy, the spectral change for molecular thin films depending on the applied bias was successively detected. Based on the analysis of the results, the functional self-assembled monolayers consisting of the electrically different group were fabricated, and their electronic states were experimentally characterized. Through this study, the design for a new type of single molecular devices was obtained.