Polypyrrole Bilayers: Charge Trapping and Application for Amperometric Ions Sensing

Malinowska, Beata; Maksymiuk, Krzysztof

doi:10.1002/elan.200390033

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…Experimentally it has been proposed that the bilayers made of polpyrrole (N-N) are promising for applications in amperometric ion sensing. [113] The buckling is found to be smaller and slightly less structural modifications are obtained in case of bilayers made of two non-identical layers (N-P, N-As, and P-As), see Table I and Fig. 4.…”

Section: Structural Arrangementsmentioning

confidence: 87%

Band gap modulation in polythiophene and polypyrrole-based systems

Kaloni

Schreckenbach

Freund

2016

Sci Rep

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In this paper, the structural and electronic properties of polythiophene and polyprrrole-based systems have been investigated using first-principles calculations both in periodic and oligomer forms. Of particular interest is the band gap modulation through substitutions and bilayer formation. Specifically, S has been substituted by Se and Te in polythiophene, leading to polyseleophene and polytellurophene, respectively, and N has been substituted by P and As in polypyrrole. The values obtained of the binding energy suggest that all the systems studied can be realized experimentally. Stacking (bilayer formation) of pure polythiophene, polypyrrole and their derivatives leads to linear suppression of the band gap or HOMO-LUMO gap as a function of the stacking. Mixed bilayers, including one formed from polythiophene on top of polypyrrole, have also been considered. Overall, a wide range of band gaps can be achieved through substitutions and stacking. Hybrid (B3LYP) calculations also suggest the same trend in the band gap as PBE calculations. Trends in the binding energy are similar for both periodic and molecular calculations. In addition, Γ-point phonon calculations were performed in order to check the stability of selected systems.

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Section: Structural Arrangementsmentioning

confidence: 87%

Band gap modulation in polythiophene and polypyrrole-based systems

Kaloni

Schreckenbach

Freund

2016

Sci Rep

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“…33 This "aging" process can be facilitated when a positive potential step is applied to the modified electrode. 34 In our experiments, potential step from the open cell to 1.0 V was applied for 1 min in 0.1 M tris/0.1 M HCl buffer solution, followed by immediate conditioning time of 2 h in the same solution. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

Hartung¹,

Kowalik²,

Kranz³

et al. 2005

J. Electrochem. Soc.

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Bilayer consisting of polypyrrole, PPy, as the inner and poly(2,5-dithienyl-( N -3-phosphorylpropyl)pyrrole, p(TPTC3-normalPO3H2) as the outer layers was electropolymerized in layer-by-layer steps. Due to the presence of phosphonic acid functionality tethered to the backbone of outer polymer, the system is capable of binding organic and inorganic bases and offers an easy and conven- ient access to sensor devices. The ion transport through the polypyrrole film depends on its thickness. The thin layer of pTPTC3-PnormalO3normalH2 does not hinder the redox and ion-transport characteristics of the PPy layer.

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“…The intermolecular channels close, trapping a high fraction of the exchanged counterions (up to 40%) when the average distance between chains becomes smaller than the diameter of the moving counterion unity (Figure 1g). [ 62,82–85 ]…”

Section: Model Materials Constituted By Macromolecular Electrochemical Motorsmentioning

confidence: 99%

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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Polypyrrole Bilayers: Charge Trapping and Application for Amperometric Ions Sensing

Cited by 5 publications

References 20 publications

Band gap modulation in polythiophene and polypyrrole-based systems

Band gap modulation in polythiophene and polypyrrole-based systems

Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

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

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