Electronic structure of polypyrrole composited with a low percentage of graphene nanofiller

Chaughtai, Zulqarnain; Hashmı, Muhammad Alı; Yar, Muhammad; Ayub, Khurshid

doi:10.1039/d0cp03258a

Cited by 8 publications

(2 citation statements)

References 46 publications

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“…Even so, there are few reports about strategies for tuning energy levels of PPy. In particular, some examples on this aspect have considered the formation of composite materials [ 61 , 62 ], the insertion of substituents into the monomer [ 63 ], and the insertion of new dopants into the polymer [ 64 ]. However, as far as we know, there are no reports on variations in the HOMO level of PPy when adjusting the electrosynthesis potential.…”

Section: Resultsmentioning

confidence: 99%

Effect of Electrosynthesis Potential on Nucleation, Growth, Adhesion, and Electronic Properties of Polypyrrole Thin Films on Fluorine-Doped Tin Oxide (FTO)

2021

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Polypyrrole (PPy) is one of the most attractive conducting polymers for thin film applications due to its good electrical conductivity, stability, optical properties, and biocompatibility. Among the technologies in which PPy has gained prominence are optoelectronics and solar energy conversion, where transparent electrodes such as fluorine-doped tin oxide (FTO) or indium tin oxide (ITO) are frequently used. However, FTO substrates have the notable advantage that their components are widely available in nature, unlike those of ITO. Recognizing the importance that the FTO/polypyrrole system has gained in various applications, here, we studied for the first time the nucleation and growth mechanism of electro-synthesized PPy on FTO. Additionally, the effect of the synthesis potential (0.9, 1.0, 1.1, and 1.2 V vs. Ag/AgCl) on the homogeneity, adhesion, conductivity, and HOMO energy levels of PPy films was determined. From current–time transients and scanning electron microscopy, it was found that films synthesized at 0.9 and 1.0 V exhibit 3D growth with progressive nucleation (as well as lower homogeneity and higher adhesion to FTO). In contrast, films synthesized at 1.1 and 1.2 V follow 2D growth with instantaneous nucleation. It was also evident that increasing the polymerization potential leads to polymers with lower conductivity and more negative HOMO levels (versus vacuum). These findings are relevant to encourage the use of electro-synthesized PPy in thin film applications that require a high control of material properties.

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Section: Resultsmentioning

confidence: 99%

Effect of Electrosynthesis Potential on Nucleation, Growth, Adhesion, and Electronic Properties of Polypyrrole Thin Films on Fluorine-Doped Tin Oxide (FTO)

2021

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“…The composite showed high electrical conductivity, good thermal stability, and enhanced electrochemical properties. In [ 76 ], theoretical studies of graphene/conducting polymer composites were carried out, as a result of which it was shown that the p-stacking orientation is preferable for such structures. For sandwich complexes of oligopyrrole with graphene nanoribbons (with lower graphene concentrations), interaction energies were found, and excellent additivity was shown.…”

Section: Composite Materials Based On Conductive Polymersmentioning

confidence: 99%

Conductive Polymers and Their Nanocomposites: Application Features in Biosensors and Biofuel Cells

Kuznetsova,

Arlyapov,

Plekhanova

et al. 2023

Polymers

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Conductive polymers and their composites are excellent materials for coupling biological materials and electrodes in bioelectrochemical systems. It is assumed that their relevance and introduction to the field of bioelectrochemical devices will only grow due to their tunable conductivity, easy modification, and biocompatibility. This review analyzes the main trends and trends in the development of the methodology for the application of conductive polymers and their use in biosensors and biofuel elements, as well as describes their future prospects. Approaches to the synthesis of such materials and the peculiarities of obtaining their nanocomposites are presented. Special emphasis is placed on the features of the interfaces of such materials with biological objects.

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Synergistic mechanism of formaldehyde adsorption by intrinsic defects and carboxyl groups on the surface of carbon materials

et al. 2023

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Electronic structure of polypyrrole composited with a low percentage of graphene nanofiller

Abstract: Low concentration of graphene (<5%) in graphene/polypyrrole composite makes it quite challenging to devise a theoretical model for such composites. Herein we present theoretical calculations for geometric electronic and optical...

Cited by 8 publications

References 46 publications

Effect of Electrosynthesis Potential on Nucleation, Growth, Adhesion, and Electronic Properties of Polypyrrole Thin Films on Fluorine-Doped Tin Oxide (FTO)

Effect of Electrosynthesis Potential on Nucleation, Growth, Adhesion, and Electronic Properties of Polypyrrole Thin Films on Fluorine-Doped Tin Oxide (FTO)

Conductive Polymers and Their Nanocomposites: Application Features in Biosensors and Biofuel Cells

Synergistic mechanism of formaldehyde adsorption by intrinsic defects and carboxyl groups on the surface of carbon materials

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