期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 6, 页码 3222-3228出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202012848
关键词
azobenzene; mechanical behavior; photo-modulating; protein fibers; supercharged polypeptides
资金
- European Research Council (ERC) [694610]
- Chinese Academy of Sciences President's International Fellowship Initiative [2018VBA0008]
- Scientific Instrument Developing Project of the Chinese Academy of Sciences [ZDKYYQ20180001]
- K.C. Wong Education Foundation [GJTD-2018-09]
- National Natural Science Foundation of China [21704099, 21877104, 21834007, 21907088]
- National Key R&D Program of China [2018YFA0902600]
- China Scholarship Council [201507720025]
- Volkswagen Foundation [92888]
Light-responsive materials have been studied for manipulating properties with high spatiotemporal control. By utilizing photo-isomerization, bioengineered protein fibers can have reversible modulation of mechanical properties, leading to the development of smart stimuli-responsive mechano-biomaterials.
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-pi 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.
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