title: Current-Driven Supramolecular Motor with In Situ Surface Chiral Directionality Switching.
abstract: 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.
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Puneet
authors.initials: P
authors.lastname: Mishra
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Hill
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Saranyan
authors.initials: S
authors.lastname: Vijayaraghavan
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Wim
authors.initials: W
authors.lastname: Van Rossom
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Yoshizawa
authors.affiliation: ‡Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES) and MANA Satellite, CNRS, 29 rue J. Marvig, 31055 Toulouse Cedex, France.
authors.forename: Maricarmen
authors.initials: M
authors.lastname: Grisolia
authors.affiliation: ‡Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES) and MANA Satellite, CNRS, 29 rue J. Marvig, 31055 Toulouse Cedex, France.
authors.forename: Jorge
authors.initials: J
authors.lastname: Echeverria
authors.affiliation: §Institute for Chemical Research, Kyoto University, Gokasho, Uji-city, Kyoto, 611-0011, Japan.
authors.forename: Teruo
authors.initials: T
authors.lastname: Ono
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ariga
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Tomonobu
authors.initials: T
authors.lastname: Nakayama
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.|‡Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES) and MANA Satellite, CNRS, 29 rue J. Marvig, 31055 Toulouse Cedex, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Joachim
authors.affiliation: †International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Uchihashi
keywords: Molecular motor; chirality; scanning tunneling microscope; supramolecule; surface; switching