Influence of the type and concentration of oxidant on the photoacoustic response of polypyrrole nanoparticles for potential bioimaging applications

Šeděnková, Ivana; Taboubi, Oumayma; Paúrová, Monika; Hromádková, Jiřina; Babič, Michal

doi:10.1016/j.synthmet.2022.117218

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…30 This analysis is particularly effective due to the sensitivity of the Raman spectrum to the local structural defects associated with the polymer chain, which are typically attributed to the protonated polarons and bipolaron of PPy. 31 The peaks at 1084 and 1377 cm −1 appeared only on the PPy-DBS-1 electrode, which was attributed to the bending vibration of polarons. Additionally, X-ray photoelectron spectroscopy (XPS) at the N 1s core level was used to provide more accurate evidence for the significant effects of dopants and doping efficiencies on the protonation state of the PPy backbone (refer to Fig.…”

Section: Resultsmentioning

confidence: 96%

Probing host–dopant interactions in conducting polymers for improved performance of electrochemical deionization

Huang,

Tu,

Yang

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 96%

Probing host–dopant interactions in conducting polymers for improved performance of electrochemical deionization

Huang,

Tu,

Yang

et al. 2024

J. Mater. Chem. A

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“…The band centered at 899 cm –1 is considered to be associated with the ring-deformation vibrations of bipolaron units in PPy, which has shifted to lower frequencies compared to the band at 932 cm –1 in the spectra recorded with 514 nm excitation wavelength. It has been agreed that Raman spectra of chemically prepared PPy at a given excitation wavelength are strongly dependent on the protonation degree . Under the experimental conditions of its preparation, the PPy@LCNFs are in their intermediate protonated state, which might account for the broadening of peaks under excitation at 784 nm.…”

Section: Resultsmentioning

confidence: 99%

“…It has been agreed that Raman spectra of chemically prepared PPy at a given excitation wavelength are strongly dependent on the protonation degree. 65 Under the experimental conditions of its preparation, the PPy@LCNFs are in their intermediate protonated state, which might account for the broadening of peaks under excitation at 784 nm.…”

Section: Resultsmentioning

confidence: 99%

Aqueous Processable One-Dimensional Polypyrrole Nanostructured by Lignocellulose Nanofibril: A Conductive Interfacing Biomaterial

Liang

et al. 2023

Biomacromolecules

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One-dimensional (1D) nanomaterials of conductive polypyrrole (PPy) are competitive biomaterials for constructing bioelectronics to interface with biological systems. Synergistic synthesis using lignocellulose nanofibrils (LCNF) as a structural template in chemical oxidation of pyrrole with Fe(III) ions facilitates surface-confined polymerization of pyrrole on the nanofibril surface within a submicrometer- and micrometer-scale fibril length. It yields a core–shell nanocomposite of PPy@LCNF, wherein the surface of each individual fibril is coated with a thin nanoscale layer of PPy. A highly positive surface charge originating from protonated PPy gives this 1D nanomaterial a durable aqueous dispersity. The fibril–fibril entanglement in the PPy@LCNFs facilely supported versatile downstream processing, e.g., spray thin-coating on glass, flexible membranes with robust mechanics, or three-dimensional cryogels. A high electrical conductivity in the magnitude of several to 12 S·cm–1 was confirmed for the solid-form PPy@LCNFs. The PPy@LCNFs are electroactive and show potential cycling capacity, encompassing a large capacitance. Dynamic control of the doping/undoping process by applying an electric field combines electronic and ionic conductivity through the PPy@LCNFs. The low cytotoxicity of the material is confirmed in noncontact cell culture of human dermal fibroblasts. This study underpins the promises for this nanocomposite PPy@LCNF as a smart platform nanomaterial in constructing interfacing bioelectronics.

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“…Among the known conducting polymers, PPy is extensively used in commercial applications owing to its high conductivity, high energy density, good durability, and low toxicity [ 6 , 7 ]. PPy is extensively used in many applications, including electrocatalysts, sensors, rechargeable batteries, and biomedicines [ 8 , 9 , 10 ]. The structure and conductivity of polymers play important roles in determining their efficiency in various applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonication Parameters on the Structural, Morphological, and Electrical Properties of Polypyrrole Nanoparticles and Optimization by Response Surface Methodology

et al. 2023

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Polypyrrole (PPy) nanoparticles are reliable conducting polymers with many industrial applications. Nevertheless, owing to disadvantages in structure and morphology, producing PPy with high electrical conductivity is challenging. In this study, a chemical oxidative polymerization-assisted ultra-sonication method was used to synthesize PPy with high conductivity. The influence of critical sonication parameters such as time and power on the structure, morphology, and electrical properties was examined using response surface methodology. Various analyses such as SEM, FTIR, DSC, and TGA were performed on the PPy. An R2 value of 0.8699 from the regression analysis suggested a fine correlation between the observed and predicted values of PPy conductivity. Using response surface plots and contour line diagrams, the optimum sonication time and sonication power were found to be 17 min and 24 W, respectively, generating a maximum conductivity of 2.334 S/cm. Meanwhile, the model predicted 2.249 S/cm conductivity, indicating successful alignment with the experimental data and incurring marginal error. SEM results demonstrated that the morphology of the particles was almost spherical, whereas the FTIR spectra indicated the presence of certain functional groups in the PPy. The obtained PPy with high conductivity can be a promising conducting material with various applications, such as in supercapacitors, sensors, and other smart electronic devices.

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Influence of the type and concentration of oxidant on the photoacoustic response of polypyrrole nanoparticles for potential bioimaging applications

Cited by 5 publications

References 37 publications

Probing host–dopant interactions in conducting polymers for improved performance of electrochemical deionization

Probing host–dopant interactions in conducting polymers for improved performance of electrochemical deionization

Aqueous Processable One-Dimensional Polypyrrole Nanostructured by Lignocellulose Nanofibril: A Conductive Interfacing Biomaterial

Effect of Ultrasonication Parameters on the Structural, Morphological, and Electrical Properties of Polypyrrole Nanoparticles and Optimization by Response Surface Methodology

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