Revolving supramolecular chiral structures powered by light in nanomotor-doped liquid crystals

Tetiana Orlova, Federico Lancia, Charles Loussert, Supitchaya Iamsaard, Nathalie Katsonis (Corresponding Author), Etienne Brasselet (Corresponding Author)

Research output: Contribution to journalArticleAcademicpeer-review

47 Citations (Scopus)

Abstract

Molecular machines operated by light have been recently shown to be able to produce oriented motion at the molecular scale 1,2 as well as do macroscopic work when embedded in supramolecular structures 3-5 . However, any supramolecular movement irremediably ceases as soon as the concentration of the interconverting molecular motors or switches reaches a photo-stationary state 6,7 . To circumvent this limitation, researchers have typically relied on establishing oscillating illumination conditions - either by modulating the source intensity 8,9 or by using bespoke illumination arrangements 10-13 . In contrast, here we report a supramolecular system in which the emergence of oscillating patterns is encoded at the molecular level. Our system comprises chiral liquid crystal structures that revolve continuously when illuminated, under the action of embedded light-driven molecular motors. The rotation at the supramolecular level is sustained by the diffusion of the motors away from a localized illumination area. Above a critical irradiation power, we observe a spontaneous symmetry breaking that dictates the directionality of the supramolecular rotation. The interplay between the twist of the supramolecular structure and the diffusion 14 of the chiral molecular motors creates continuous, regular and unidirectional rotation of the liquid crystal structure under non-equilibrium conditions.

Original languageEnglish
Pages (from-to)304-308
Number of pages5
JournalNature nanotechnology
Volume13
Issue number4
DOIs
Publication statusPublished - 1 Apr 2018

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