The cooperative actuation of multistep electrochemical molecular machines in polypyrrole films senses the imposed energetic conditions: Influence of the potential scan rate

Otero, Toribio F.; Beaumont, Samuel

doi:10.1016/j.electacta.2017.11.186

Cited by 11 publications

(18 citation statements)

References 101 publications

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“…c) Cooperative actuation of the molecular machines in a polymeric film driven by its oxidation/reduction originating the film expansion/contraction by entrance/expulsion of balancing counterions and solvent molecules. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Materials Replicating the Icm Of Functional Cells Under Elecmentioning

confidence: 99%

“…Figure shows the experimental results obtained by cyclic voltammetry or square potential waves for the extension of the polypyrrole reversible oxidation/reduction as a function of the electrolyte concentration (chemical energy), temperature (thermal energy) ,,. or potential sweep rate (energetic demand) ,,…”

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

“…g) Evolution of the specific reaction energy consumed by the film when is submitted to potential sweeps between −0.35 and 0.25 V at different scan rates, submerged in a 0.1 M NaCl aqueous solution at room temperature. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

“…For reactions involving chemical molecular machines, despite the reversibility of the reaction extension (same oxidation and reduction charge), oxidation and reduction energies present (Figure ), whatever the reaction conditions, an important asymmetry. This energetic asymmetry is due to the asymmetry of the macroscopic structural changes driven during the material oxidation/reduction by the cooperative actuation of the molecular machines: conformational relaxation‐swelling versus shrinking‐conformational compaction and ion trapping ,,. The reaction asymmetry is enhanced by the osmotic exchange of solvent, the physical process that follows the faradaic ionic exchange.…”

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

“…Using basic electrochemical, polymeric and mechanical principles a theoretical description of sensing and tactile artificial muscles (artificial proprioception) has been attained ,,,,. The way is open for a theoretical (physical‐chemical) description of bioreplicating chemical‐driven properties and functions.…”

Section: Technological Outlooksmentioning

confidence: 99%

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The Energy Consumed by Electrochemical Molecular Machines as Self‐Sensor of the Reaction Conditions: Origin of Sensing Nervous Pulses and Asymmetry in Biological Functions

Otero

Beaumont

2018

ChemElectroChem

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For reactions involving molecular machines (artificial or biochemical), the evolution of the reaction energy, or that of any of its components, adapts to and senses the working thermal, chemical, or mechanical conditions. Here, the state of the art and the attained sensing equations of the oxidation/reduction of conducting polymers seen as replicating materials and reactions of the intracellular matrix of functional cells (molecular machines, ions and water) are reviewed. The adapting reaction energy in actuating muscles and other organs can originate the nervous pulses translating its quantitative energetic information (thermal, fatigue state and mechanical) to the brain. Besides, reversible oxidation/reduction charges originate a great asymmetry of the consumed reaction energies, which could explain why evolution has selected and improved the most efficient of the two reactions to drive full asymmetric biological functions such as muscle contraction or the flow of nervous signals. The material reaction drives volume variations and energetic adaptation, two simultaneous functions that have allowed the development of artificial sensing‐muscles postulated to replicate some primitive artificial proprioception.

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Section: Materials Replicating the Icm Of Functional Cells Under Elecmentioning

confidence: 99%

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

Section: Quantitative Formulation For Electrochemical Reactionsmentioning

confidence: 99%

Section: Technological Outlooksmentioning

confidence: 99%

See 3 more Smart Citations

The Energy Consumed by Electrochemical Molecular Machines as Self‐Sensor of the Reaction Conditions: Origin of Sensing Nervous Pulses and Asymmetry in Biological Functions

Otero

Beaumont

2018

ChemElectroChem

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Exploring Brain Information Storage/Reading for Neuronal Connectivity Using Macromolecular Electrochemical Sensing Motors

Otero

2021

Advanced Intelligent Systems

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Dense electroactive gels of conducting polymers, carbon nanotubes, or graphenes, constituted by multisensing macromolecular electrochemical motors, are presented herein as model materials to get a physicochemical characterization of the opening/closing cycles of ion protein channels in neurons. The conformational contracted energetic states of these macromolecular motors store both long‐term and short‐term information packages. Under a potential cycle, the energy of each ionic pulse generated during the channel opening reads the stored information, which is restored during the channel conformational closing. Simultaneously the motor actuation senses the working physical and chemical energetic conditions, transferring to the ionic pulse energy those sensing information packages. A quantitative description of the stored and read information packages is attained from basic electrochemical, mechanical, and polymeric concepts. Translated to ion channel proteins in brain dendrites, it can describe brain information storage mechanisms and the energetic information packages read and carried through each ionic pulse to the action potential. An unexplored way is opened to try to understand and describe how the different brain parts can use this information to originate brain functions. In parallel, the construction of new electrochemical devices and computers replicating biological functions will provide feedback quantitative information to decipher brain functions.

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Reaction Induced Conformational Change in Polyindole: Polyindole/PVA Film as Biomimetic Sensors of Temperature and Electrical Energetic Conditions

Rajan,

Shabeeba,

Sidheekha

et al. 2023

Chemistry An Asian Journal

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The influence of surrounding temperature and electrical energetic condition on the conformational movements (cooperative actuation) of polyindole is verified using a polyindole‐coated polyvinyl alcohol (PIN/PVA) film. Chronopotentiometric studies reveals that the consumed electrical energy during the reaction varies linearly with the change in working temperature. The influence of temperature on the reversible conformational movements of the polymer chain is related to the charge consumed during the reaction. The logarithmic dependence of reversible redox charge obtained from coulovoltammogram with inverse of temperature further proved the temperature sensing characteristics and the influence of temperature on the cooperative actuation of the PIN/PVA film. The conformational relaxation increases as the temperature increases through hosting higher number of counter anions with the solvent molecule. The extension of the redox reaction or charge consumption was found to decrease as the scan rate increases. The double logarithmic relation between the consumed redox charge and the scan rate has proved that the electrical energetic condition can influence the conformational movement or the extension of the redox reaction in a reversible manner. The results suggest that the PIN/PVA film can act as a biomimetic macro molecular sensor of working temperature and electrical energetic condition as biological muscles do.

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The cooperative actuation of multistep electrochemical molecular machines in polypyrrole films senses the imposed energetic conditions: Influence of the potential scan rate

Cited by 11 publications

References 101 publications

The Energy Consumed by Electrochemical Molecular Machines as Self‐Sensor of the Reaction Conditions: Origin of Sensing Nervous Pulses and Asymmetry in Biological Functions

The Energy Consumed by Electrochemical Molecular Machines as Self‐Sensor of the Reaction Conditions: Origin of Sensing Nervous Pulses and Asymmetry in Biological Functions

Exploring Brain Information Storage/Reading for Neuronal Connectivity Using Macromolecular Electrochemical Sensing Motors

Reaction Induced Conformational Change in Polyindole: Polyindole/PVA Film as Biomimetic Sensors of Temperature and Electrical Energetic Conditions

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