Supramolecular–covalent hybrid polymers for light-activated mechanical actuation

Photoactuators that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest in the recent years owing to the advantages of abundant availability of resources, remote and accurate control, and applicability in soft robots, sensors and biomimetic devices. In this study, the recent advances in photoactuators related to actuation mechanisms (photothermal and photochemical), fabricaton from different configurations and types of materials, and their potential applications in bionic movements are reviewed. The opportunities and challenges in this field are also discussed, such as fabricating actuators with robust mechanical properties and superior actuating performance, seeking effective actuation mechanisms, and widening the range of applications. This review provides an insight into designing high‐performance, multi‐functional photoactuators and serves as a motivation for their development in future.

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Section: Summary and Perspectivesmentioning

confidence: 99%

Recent Advances in Photoactuators and Their Applications in Intelligent Bionic Movements

Zhou

Liu

2020

Advanced Optical Materials

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“…Photo-induced self-assemblies of peptide fibers [ 3 ] and the manipulation of cell behaviors [ 4 ] have been reported using peptides protected with a photo-cleavable nitrobenzyl group. More recently, a photo-activated mechanical actuation was realized by peptide fibers conjugated with spiropyran units in which ring-open and ring-close can be switched by a light [ 5 , 6 ]. As described later, a variety of manipulations for controlling cell behaviors are possible by introducing bioactive peptides into hydrophilic parts exposed to solutions, which have led to attractive applications to cell culture scaffolds and drug delivery systems.…”

Section: Peptide-based Self-assembliesmentioning

confidence: 99%

“…Among them, peptide-based fibrous supramolecular assemblies are one of the most attractive platforms to design biomaterials with various bioactivities and structures, and they have recently attracted particular attention. In pioneer works, amphiphilic peptides having hydrophobic alkyl chain at the termini of hydrophilic peptides have been designed, and their fundamental properties and applications to biomaterials have been investigated [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ]. Currently, both amphiphilic peptides and other peptide-based self-assembly units have been found, enabling the design of peptide fibers with a variety of functions [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ,…”

Section: Introductionmentioning

confidence: 99%

Current Progress in Cross-Linked Peptide Self-Assemblies

Uchida

Muraoka

2020

IJMS

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Peptide-based fibrous supramolecular assemblies represent an emerging class of biomaterials that can realize various bioactivities and structures. Recently, a variety of peptide fibers with attractive functions have been designed together with the discovery of many peptide-based self-assembly units. Cross-linking of the peptide fibers is a key strategy to improve the functions of these materials. The cross-linking of peptide fibers forming three-dimensional networks in a dispersion can lead to changes in physical and chemical properties. Hydrogelation is a typical change caused by cross-linking, which makes it applicable to biomaterials such as cell scaffold materials. Cross-linking methods, which have been conventionally developed using water-soluble covalent polymers, are also useful in supramolecular peptide fibers. In the case of peptide fibers, unique cross-linking strategies can be designed by taking advantage of the functions of amino acids. This review focuses on the current progress in the design of cross-linked peptide fibers and their applications.

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“…Structures with non-covalently coupled monomers can contribute to sustainable materials since at least partial replacement of covalent bonds for non-covalent ones will create more easily processable and recyclable materials. These hybrid materials are also of interest as stimuli-responsive materials for robotic and sensing applications to use either the dynamic nature of supramolecular polymers to enhance the time scales of responsive behavior or their ordering capacity to create anisotropic structures [ 4 , [34] , [35] , [36] ]. The partial replacement is in fact extremely important in order to create materials that combine the robustness of covalent polymers with dynamics and order of supramolecular polymers.…”

Section: Introductionmentioning

confidence: 99%

Design of materials with supramolecular polymers

Clemons

Stupp

2020

Progress in Polymer Science

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One hundred years ago Hermann Staudinger was strongly criticized by his scientific peers for his macromolecular hypothesis, but today it is hard to imagine a world without polymers. His hypothesis described polymers as macromolecules composed of large numbers of structural units connected by covalent bonds. In the 1990s the concept of supramolecular polymers emerged in the scientific literature as discrete entities of large molar mass comparable to that of classical polymers but built through non-covalent bonds among monomers. Supramolecular polymers exist in biological systems, and potentially blend the physical properties of covalent polymers with unique features such as high degrees of internal order within the polymeric structure, defined shapes, and novel dynamics. This trend article provides a summary of seminal contributions in supramolecular polymerization and provides recent examples from the Stupp laboratory to demonstrate the potential applications of an exciting class of materials composed fully or partially of supramolecular polymers. In closing, we provide our perspective on future opportunities provided by this field at the onset of a second century of polymers. It is our objective here to demonstrate that this second century could be as prosperous, if not more so, than the preceding one.

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Supramolecular–covalent hybrid polymers for light-activated mechanical actuation

Cited by 253 publications

References 32 publications

Recent Advances in Photoactuators and Their Applications in Intelligent Bionic Movements

Recent Advances in Photoactuators and Their Applications in Intelligent Bionic Movements

Current Progress in Cross-Linked Peptide Self-Assemblies

Design of materials with supramolecular polymers

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