Observation of Electronic States in Molecular Devices under Operative Conditions

分子器件的电子态不仅会受到与金属电极的相互作用的干扰，还会受到操作中感应电荷和/或施加偏压的干扰。在本研究中，我们尝试直接观察分子在操作条件下的电子态，以深入了解其电学性质。利用荧光产额x射线吸收光谱法，先后检测了分子薄膜随施加偏置的光谱变化。在分析结果的基础上，制备了由不同电性基团组成的功能自组装单层膜，并对其电子态进行了实验表征。通过本研究，获得了一种新型单分子器件的设计方案。

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.