Light-driven molecular switch for reconfigurable spin filters
Light-driven molecular switch for reconfigurable spin filters
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DOI：
10.1038/s41467-019-10423-6
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发表时间：
2019-06-05
影响因子：
16.6
通讯作者：
Yamamoto, Hiroshi M.
中科院分区：
文献类型：
--
作者：
Suda, Masayuki;Thathong, Yuranan;Yamamoto, Hiroshi M.
在过去的几十年里，人工分子开关和能够通过外部刺激使分子组分定向运动的机器经历了快速的发展。特别地，从旋转步骤期间的手性切换的观点来看，过度拥挤的基于烯烃的人工分子马达是非常有吸引力的。然而，将这些分子开关集成到固态器件中仍然具有挑战性。在此，我们提出了一个可以通过光照射或热处理来切换自旋偏振方向的固态自旋过滤器件的示例。该器件利用分子马达的手性反转，利用手性诱导的自旋选择性效应实现光驱动的可重构自旋过滤器。通过该装置，我们发现，在分子尺度上的灵活性是必不可少的固态器件中使用分子机器的电极。本研究结果是有益的固态功能出现的分子开关的纳米级运动的发展。
Artificial molecular switches and machines that enable the directional movements of molecular components by external stimuli have undergone rapid advances over the past several decades. Particularly, overcrowded alkene-based artificial molecular motors are highly attractive from the viewpoint of chirality switching during rotational steps. However, the integration of these molecular switches into solid-state devices is still challenging. Herein, we present an example of a solid-state spin-filtering device that can switch the spin polarization direction by light irradiation or thermal treatment. This device utilizes the chirality inversion of molecular motors as a light-driven reconfigurable spin filter owing to the chiral-induced spin selectivity effect. Through this device, we found that the flexibility at the molecular scale is essential for the electrodes in solid-state devices using molecular machines. The present results are beneficial to the development of solid-state functionalities emerging from nanosized motions of molecular switches.