Bending Actuation of Hydrogels through Rotation of Light-Driven Molecular Motors.

Autor: Perrot A; SAMS Research Group, Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, 67000, Strasbourg, France.; School of Chemistry, University of Birmingham, Birmingham, B15 2TT, UK., Wang WZ; SAMS Research Group, Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, 67000, Strasbourg, France., Buhler E; Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Université Paris Cité, Bâtiment Condorcet, 75013, Paris, France., Moulin E; SAMS Research Group, Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, 67000, Strasbourg, France., Giuseppone N; SAMS Research Group, Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, 67000, Strasbourg, France.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Mar 20; Vol. 62 (13), pp. e202300263. Date of Electronic Publication: 2023 Feb 14.
DOI: 10.1002/anie.202300263
Abstrakt: The unidirectional rotation of chemically crosslinked light-driven molecular motors is shown to progressively shift the swelling equilibrium of hydrogels. The concentration of molecular motors and the initial strand density of the polymer network are key parameters to modulate the macroscopic contraction of the material, and both parameters can be tuned using polymer chains of different molecular weights. These findings led to the design of optimized hydrogels revealing a half-time contraction of approximately 5 min. Furthermore, under inhomogeneous stimulation, the local contraction event was exploited to design useful bending actuators with an energy output 400 times higher than for previously reported self-assembled systems involving rotary motors. In the present configuration, we measure that a single molecular motor can lift up loads of 200 times its own molecular weight.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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