Mechanically Driven Activation of Polyaniline into Its Conductive Form

Baytekin, Bilge; Baytekin, H. Tarık; Grzybowski, Bartosz A.

doi:10.1002/anie.201311313

Cited by 24 publications

(15 citation statements)

References 53 publications

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“…We propose such a connection between LP formation and the above mentioned “tracking” can be made by coupling a mechanical input to the reaction–diffusion process. It has been already shown that mechanical input is used to initiate and affect chemical reactions (referred to as mechanochemistry), chemically functionalize surfaces, and sometimes even alter conventional (thermal or photo) reaction pathways . In material science, there are also applications of macroscopic mechanical inputs, such as prestraining (printing on a stretched substrate), that have been used for transformation of 2D structures into 3D objects.…”

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confidence: 99%

“…Herein we show that the information embedded in the presence/absence, location, and geometry of the patterns formed in reaction-diffusion systems can be used to track mechanical changes in the surrounding environment and be used for the complex patterning of other (secondary) materials.We propose such a connection between LP formation and the above mentioned "tracking" can be made by coupling a mechanical input to the reaction-diffusion process. It has been already shown that mechanical input is used to initiate and affect chemical reactions (referred to as mechanochemistry), [28,29] chemically functionalize surfaces, [30,31] and sometimes even alter conventional (thermal or photo) reaction pathways. [32] In material science, there are also applications of macroscopic mechanical Material design using nonequilibrium systems provides straightforward access to complexity levels that are possible through dynamic processes.…”

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confidence: 99%

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Mechanical Control of Periodic Precipitation in Stretchable Gels to Retrieve Information on Elastic Deformation and for the Complex Patterning of Matter

et al. 2020

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Material design using nonequilibrium systems provides straightforward access to complexity levels that are possible through dynamic processes. Pattern formation through nonequilibrium processes and reaction–diffusion can be used to achieve this goal. Liesegang patterns (LPs) are a kind of periodic precipitation patterns formed through reaction–diffusion. So far, it has been shown that the periodic band structure of LPs and the geometry of the pattern can be controlled by experimental conditions and external fields (e.g., electrical or magnetic). However, there are no examples of these systems being used to retrieve information about the changes in the environment as they form, and there are no studies making use of these patterns for complex material preparation. This work shows the formation of LPs by a diffusion–precipitation reaction in a stretchable hydrogel and the control of the obtained patterns by the unprecedented and uncommon method of mechanical input. Additionally, how to use this protocol and how deviations from “LP behavior” of the patterns can be used to “write and store” information about the time, duration, extent, and direction of gel deformation are presented. Finally, an example of using complex patterning to deposit polypyrrole by using precipitation patterns is shown as a template.

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Mechanical Control of Periodic Precipitation in Stretchable Gels to Retrieve Information on Elastic Deformation and for the Complex Patterning of Matter

et al. 2020

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Force is also generated along polymer chains by sonicating polymer solutions [4,10,[14][15][16][17][18][19][20][21] and swelling cross-linked polymers. [1][2][3][4][5][6][7][8][9][10][11][12][13] Force is also generated along polymer chains by sonicating polymer solutions [4,10,[14][15][16][17][18][19][20][21] and swelling cross-linked polymers.…”

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Mechanophores with a Reversible Radical System and Freezing‐Induced Mechanochemistry in Polymer Solutions and Gels

et al. 2015

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Visualization and quantitative evaluation of covalent bond scission in polymeric materials are highly important for understanding failure, fatigue, and deterioration mechanisms and improving the lifetime, durability, toughness, and reliability of the materials. The diarylbibenzofuranone-based mechanophore radical system enabled, through electron paramagnetic resonance spectroscopy, in situ quantitative evaluation of scission of the mechanophores and estimation of mechanical energy induced along polymer chains by external forces. The coagulation of polymer solutions by freezing probably generated force but did not cleave the mechanophores. On the other hand, cross-linking led to efficient propagation of the force of more than 80 kJ mol(-1) to some mechanophores, resulting their cleavage and generation of colored stable radicals. This mechanoprobe concept has the potential to elucidate other debated issues in the polymer field as well.

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“…In this context, various methods have been developed to tailor molecular assemblies on a macroscopic scale, in which stimuli‐responsive molecules are the best candidates to mimic such biological systems. For example, highly ordered stimuli‐responsive molecules often exhibit macroscopic scale phenomena due to an external stimulus, such as light or mechanical force . Aida et al.…”

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confidence: 99%

Static Electricity‐Responsive Supramolecular Assembly

Jintoku

Ihara

Matsuzawa

et al. 2017

Chemistry A European J

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Stimuli-responsive materials can convert between molecular scale and macroscopic scale phenomena. Two macroscopic static electricity-responsive phenomena based on nanoscale supramolecular assemblies of a zinc porphyrin derivative are presented. One example involves the movement of supramolecular assemblies in response to static electricity. The assembly of a pyridine (Py) complex of the above-mentioned derivative in cyclohexane is drawn to a positively charged material, whereas the assembly of a 3,5-dimethylpyridine complex is drawn to a negatively charged material. The second phenomenon involves the movement of a non-polar solvent in response to static electrical stimulation. A cyclohexane solution containing a small quantity of the Py-complexed assembly exhibited a strong movement response towards negatively charged materials. Based on spectroscopic measurements and electron microscope observations, it was revealed that the assembled formation generates the observed response to static electricity.

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Mechanically Driven Activation of Polyaniline into Its Conductive Form

Cited by 24 publications

References 53 publications

Mechanical Control of Periodic Precipitation in Stretchable Gels to Retrieve Information on Elastic Deformation and for the Complex Patterning of Matter

Mechanical Control of Periodic Precipitation in Stretchable Gels to Retrieve Information on Elastic Deformation and for the Complex Patterning of Matter

Mechanophores with a Reversible Radical System and Freezing‐Induced Mechanochemistry in Polymer Solutions and Gels

Static Electricity‐Responsive Supramolecular Assembly

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