Chemical sensors from the cooperative actuation of multistep electrochemical molecular machines of polypyrrole: Voltammetric study

Otero, Toribio F.; Beaumont, Samuel

doi:10.1016/j.snb.2017.06.185

Cited by 31 publications

(27 citation statements)

References 41 publications

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“…The electroactivity of the attained films was checked at room temperature in 0.1 M NaCl aqueous solution (control solution) by consecutive potential sweeps between −0.35 V and 0.25 V at 90 mV s −1 . Both, the mass and the electroactivity of the electrogenerated films corroborate the great reproducibility of the electrogeneration procedure, as presented in a previous paper …”

Section: Methodssupporting

confidence: 86%

“…Now our group is concerned about the basic sensing properties of those driving reactions and how the sensing signal is generated . Here we present how the polypyrrole oxidation/reduction in aqueous solution driven by square potential waves or square current waves respond to the working temperature, sensing this temperature through the consumed reaction energy or the material potential.…”

Section: Introductionmentioning

confidence: 99%

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A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells

Beaumont

Otero

2017

ChemElectroChem

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Polypyrrole film electrodes are composed of macromolecular electrochemical machines, ions and water. They are considered here as a model of the intracellular matrix of ectothermic muscle cells. The oxidation/reduction responses to the working temperature in aqueous solutions were investigated herein by potential and current steps. Under potentiostatic conditions, rising temperatures stimulate deeper conformational movements of the polymeric chains leading to the exchange of more ions increasing the consumed charge, with the effect that the reaction charge responds and senses the working temperature. Under galvanostatic conditions and higher environmental thermal energies the material potential evolves at lower values during reactions consuming lower electrical energies. At any reaction time, both the consumed reaction energy and the material potential sense the working thermal conditions. Reactions involving molecular machines sense and respond to the working temperature. Similarities with energetic consumptions and sensing responses from muscles in cold‐blooded animals are discussed. A theoretical description is proposed.

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Section: Methodssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells

Beaumont

Otero

2017

ChemElectroChem

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“…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%

Section: Technological Outlooksmentioning

confidence: 99%

“…Using basic electrochemical, polymeric and mechanical principles a theoretical description of sensing and tactile artificial muscles (artificial proprioception) has been attained. [35,87,89,93,[98][99][100][101] The way is open for a theoretical (physical-chemical) description of bioreplicating chemical-driven properties and functions. A new technological world of simplified chemical and electrochemical-driven multifunctional devices, tools and robots replicating biological systems is emerging.…”

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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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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Chemical sensors from the cooperative actuation of multistep electrochemical molecular machines of polypyrrole: Voltammetric study

Cited by 31 publications

References 41 publications

A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells

A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells

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

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

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