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Reversibly Photo-Modulating Mechanical Stiffness and Toughness of Bioengineered Protein Fibers
Authors
Robert Göstl
Andreas Herrmann
+9 more
Kai Liu
Chao Ma
Sourav Maity
Giuseppe Portale
Wouter H. Roos
Jing Sun
Fan Wang
Hongjie Zhang
Yu Zhou
Publication date
1 January 2020
Publisher
Weinheim : Wiley-VCH
Doi
Cite
Abstract
Light-responsive materials have been extensively studied due to the attractive possibility of manipulating their properties with high spatiotemporal control in a non-invasive fashion. This stimulated the development of a series of photo-deformable smart devices. However, it remained a challenge to reversibly modulate the stiffness and toughness of bulk materials. Here, we present bioengineered protein fibers and their optomechanical manipulation by employing electrostatic interactions between supercharged polypeptides (SUPs) and an azobenzene (Azo)-based surfactant. Photo-isomerization of the Azo moiety from the E- to Z-form reversibly triggered the modulation of tensile strength, stiffness, and toughness of the bulk protein fiber. Specifically, the photo-induced rearrangement into the Z-form of Azo possibly strengthened cation–π interactions within the fiber material, resulting in an around twofold increase in the fiber's mechanical performance. The outstanding mechanical and responsive properties open a path towards the development of SUP-Azo fibers as smart stimuli-responsive mechano-biomaterials. © 2020 The Authors. Angewandte Chemie International Edition published by Wiley-VCH Gmb
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Last time updated on 23/07/2022