Current-Driven Supramolecular Motor with In Situ Surface Chiral Directionality Switching

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• 作者：Puneet Mishra ; Jonathan P. Hill ; Saranyan Vijayaraghavan ; Wim Van Rossom ; Shunsuke Yoshizawa ; Maricarmen Grisolia ; Jorge Echeverria ; Teruo Ono ; Katsuhiko Ariga ; Tomonobu Nakayama ; Christian Joachim ; Takashi Uchihashi
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：July 8, 2015
• 年：2015
• 卷：15
• 期：7
• 页码：4793-4798
• 全文大小：359K
• ISSN：1530-6992

文摘

Surface-supported molecular motors are nanomechanical devices of particular interest in terms of future nanoscale applications. However, the molecular motors realized so far consist of covalently bonded groups that cannot be reconfigured without undergoing a chemical reaction. Here we demonstrate that a platinum-porphyrin-based supramolecularly assembled dimer supported on a Au(111) surface can be rotated with high directionality using the tunneling current of a scanning tunneling microscope (STM). Rotational direction of this molecular motor is determined solely by the surface chirality of the dimer, and most importantly, the chirality can be inverted in situ through a process involving an intradimer rearrangement. Our result opens the way for the construction of complex molecular machines on a surface to mimic at a smaller scale versatile biological supramolecular motors.