Self‐Oscillating Polymer Brushes

Masuda, Tsukuru; Hidaka, Mio; Murase, Yoko; Akimoto, Aya Mizutani; Nagase, Kenichi; Okano, Teruo; Yoshida, Ryo

doi:10.1002/anie.201301988

Cited by 69 publications

(74 citation statements)

References 35 publications

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“…[2] Recent image analysis developments with high spatio-temporal resolution have revealed the existence of oscillatory shape deformations during cellular dynamics such as cytokinesis, [3] cell migration, [4][5][6] and morphogenesis. [9] Recently,s elf-oscillating material systems are evolving,and we have reported several types of selfoscillating polymeric materials such as tubular self-oscillating gels, [10,11] self-oscillating polymer brushes, [12] and self-oscillating block copolymers. [9] Recently,s elf-oscillating material systems are evolving,and we have reported several types of selfoscillating polymeric materials such as tubular self-oscillating gels, [10,11] self-oscillating polymer brushes, [12] and self-oscillating block copolymers.…”

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confidence: 63%

Evolved Colloidosomes Undergoing Cell‐like Autonomous Shape Oscillations with Buckling

2016

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In living systems, there are many autonomous and oscillatory phenomena to sustain life, such as heart contractions and breathing. At the microscopic level, oscillatory shape deformations of cells are often observed in dynamic behaviors during cell migration and morphogenesis. In many cases, oscillatory behaviors of cells are not simplistic but complex with diverse deformations. So far, we have succeeded in developing self-oscillating polymers and gels, but complex oscillatory behaviors mimicking those of living cells have yet to be reproduced. Herein, we report a cell-like hollow sphere composed of self-oscillating microgels, that is, a colloidosome, that exhibits drastic shape oscillation in addition to swelling/deswelling oscillations driven by an oscillatory reaction. The resulting oscillatory profile waveform becomes markedly more complex than a conventional one. Especially for larger colloidosomes, multiple buckling and moving buckling points are observed to be analogous to cells.

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confidence: 63%

Evolved Colloidosomes Undergoing Cell‐like Autonomous Shape Oscillations with Buckling

2016

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“…[ 26,27 ] To date, we have demonstrated several autonomous biomimetic soft actuators showing autonomous intestine-like motion of a tubular gel, self-oscillating polymer brushes with ciliary-like motion, etc. [ 28,29 ] Recently, as an evolution of these polymer systems inspired by biological cell behaviors, we created self-oscillating polymeric materials coupled with supramolecular chemistry. One system showed ameba-like viscosity oscillations by utilizing dynamic metal-ligand coordination, [ 30 ] and the other systems displayed micelle/unimer [ 31 ] or vesicle/unimer [ 32 ] oscillations by utilizing the rhythmic changes owing to the association/dissociation of block copolymers as building blocks.…”

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confidence: 99%

Self‐Beating Artificial Cells: Design of Cross‐Linked Polymersomes Showing Self‐Oscillating Motion

2014

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Biomimetic cross-linked polymersomes that exhibit a self-beating motion without any on-off switching are developed. The polymersomes are made from a well-defined synthetic thermoresponsive diblock copolymer, and the thermoresponsive segment includes ruthenium catalysts for the oscillatory chemical reaction and vinylidene groups to cross-link the polymersomes. Autonomous volume and shape oscillations of the cross-linked polymersomes are realized following redox changes of the catalysts.

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“…Second, by taking advantage of solubility differences of the M(bpy) complexes with chloride (water solubility) and hexafluorophosphate counterions (organic solubility), 21 Figure S3)), where unfunctionalized Ru-complex was easily removed by solvent washing. Consequently, the scheme is well suited for large scale production due to the inactivity of side products to subsequent synthetic steps.…”

Section: Modular Bz Hydrogel Fabricationmentioning

confidence: 99%

Belousov–Zhabotinsky Hydrogels: Relationship between Hydrogel Structure and Mechanical Response

et al. 2015

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The novel chemo-mechanical feedback within autonomic Belousov-Zhabotinsky (BZ) hydrogels mimics the complex adaptivity found in natural systems, and inspires soft device concepts for chemical computing, sensing and actuation. A quantitative relationship between the dynamic response, strain, BZ reagents and hydrogel constituents however, is still evolving due to a limited material suite. Using a modular synthesis strategy for free-radical BZ-catalyst monomers, we compare the impact of cross-linker, catalyst, and total polymer concentration on the cyclic strain of PNIPAm and PAAm based BZ hydrogels. The oscillator strain of the hydrogel in the BZ solution relative to the difference between equilibrium swelling of the fully oxidized and reduced states highlights the trade-off between BZ reaction kinetics, hydrogel elasticity, and catalyst concentration. For a PNIPAm-based BZ gel, a maximum strain of 20% occurs at a total polymer and [Ru] concentration of 4.8 ± 0.5 μg/mm 3 and 1.5 mM due to a complementary balance of Ru content, extended BZ period (33 ± 8 min), and modest network crosslinking. The modular synthesis approach enables formulation studies to identify the BZ hydrogel architecture that provides maximum strain response and robustness, as well as elucidating the interrelationship between hydrogel structure, composition and reaction conditions.

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Self‐Oscillating Polymer Brushes

Cited by 69 publications

References 35 publications

Evolved Colloidosomes Undergoing Cell‐like Autonomous Shape Oscillations with Buckling

Evolved Colloidosomes Undergoing Cell‐like Autonomous Shape Oscillations with Buckling

Self‐Beating Artificial Cells: Design of Cross‐Linked Polymersomes Showing Self‐Oscillating Motion

Belousov–Zhabotinsky Hydrogels: Relationship between Hydrogel Structure and Mechanical Response

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