Raman spectroscopic evidence of thickness dependence of the doping level of electrochemically deposited polypyrrole film

Chen, Fengen; Shi, Gaoquan; Fu, Mingxiao; Qu, Liangti; Hong, Xin

doi:10.1016/s0379-6779(02)00197-2

Cited by 113 publications

(79 citation statements)

References 31 publications

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“…The most intense band in the PPy spectrum at 1595 cm -1 is shifted to 1582 cm -1 for the PPyEtCN nanowires. This band is assigned as arising from the ν(C = C) modes of both oxidised and neutral pyrrole units [20]. This shift to a lower wavenumber is indicative of a reduction in the amount of oxidised units in the nanowires compared to PPy.…”

Section: Structural Characterisation Of Ppyetcn Filmmentioning

confidence: 97%

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

McCarthy

McGuinness

Alcock-Earley

et al. 2012

Electrochemistry Communications

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a b s t r a c t a r t i c l e i n f oIn this paper the first synthesis of poly[N-(2-cyanoethyl)pyrrole] (PPyEtCN) in a nanowire morphology is reported. The method employed is a facile, one step electrochemical growth, which does not require the use of any templates or surfactants. Using optimised conditions the nanowires nucleate to give a homogeneous film across the electrode surface, with lengths of approximately 2 μm and diameters of approximately 150 nm. Structural information on the nanowires was obtained using vibrational spectroscopy. Evidence is presented to support an instantaneous 3-D nucleation and growth mechanism for the nanowires.

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Section: Structural Characterisation Of Ppyetcn Filmmentioning

confidence: 97%

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

McCarthy

McGuinness

Alcock-Earley

et al. 2012

Electrochemistry Communications

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show abstract

“…They are also shifted to lower wavenumbers during the corrosion process. The Raman peaks of the dopant anion shift from 931 cm -1 to 920 cm -1 in the reduced state [52]. The PPy(MoO 4 )/mild steel film is in the oxidised state while it protects mild steel substrate and is progressively changed to the reduced state during the protection progress.…”

Section: Raman Spectroscopy Of Ppy(moo 4 )mentioning

confidence: 97%

Layers of Inhibitor Anion – Doped Polypyrrole for Corrosion Protection of Mild Steel

Đức¹,

Trung²

2013

Materials Science - Advanced Topics

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“…It was reported by J. Duchet et al [53] that the peak at 1503 cm -1 represents a skeletal band. Moreover, a broad feature comprised of several overlapping bands and centered at 1348 cm -1 is assigned to a hybrid mode of intra-ring C-C bond stretching and mainly inter-ring C-C bond stretching [52], antisymmetrical C-N stretching [53] or ring stretching [55,56]. The peak at 1258 cm -1 has been assigned to the antisymmetrical C-H in-plane bending mode [53] or N-H in-plane deformation [55].…”

Section: Characterization Of Synthesized Polypyrrole Powdersmentioning

confidence: 99%

“…The most important peak is the one at ca. 1599 cm -1 , which represents the backbone stretching mode of C=C bonds and is considered to be an overlap of the contribution of the reduced and oxidized forms of polypyrrole [52][53][54][55][56][57]. The peak positions of C=C backbone stretching bonds are in favour of dominating oxidized species.…”

Section: Characterization Of Synthesized Polypyrrole Powdersmentioning

confidence: 99%

Chemical synthesis of hollow sea urchin like nanostructured polypyrrole particles through a core–shell redox mechanism using a MnO2 powder as oxidizing agent and sacrificial nanostructured template

et al. 2013

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Chemical synthesis of hollow sea urchin like nanostructured polypyrrole particles through a core-shell redox mechanism using a MnO2 powder as oxidizing agent and sacrificial nanostructured template. Synthetic Metals, Elsevier, 2013, 175, pp.192-199. 10.1016/j.synthmet.2013 1 Chemical synthesis of hollow sea urchin like nanostructured polypyrrole particles through a core-shell redox mechanism using a MnO 2 powder as oxidizing agent and sacrificial nanostructured template AbstractHollow sea urchin shaped nanostructured polypyrrole powder was successfully synthesized chemically in an acidic medium through a core-shell redox mechanism by using a nanostructured MnO 2 powder as oxidizing agent and sacrificial template simultaneously. The morphology and the structure of MnO 2 powder based reactant and produced polypyrrole powder were characterized respectively by using FEG-SEM, TEM, EDX and XRD techniques, which led us to demonstrate clearly the formation of hollow and open microparticles of polypyrrole with the presence of nanotubes on their surface. Nanostructured polypyrrole powder was found to be rather amorphous even though the shape of the polypyrrole particles was induced by the crystalline and nanostructured sea urchin shaped MnO 2 powder on which they grew. In addition, neither MnO 2 nor any manganese based species were found within the produced polypyrrole powder, which ruled out the production of composite materials. cations as reaction products isolated after filtration of the reaction medium.

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Raman spectroscopic evidence of thickness dependence of the doping level of electrochemically deposited polypyrrole film

Cited by 113 publications

References 31 publications

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

Layers of Inhibitor Anion – Doped Polypyrrole for Corrosion Protection of Mild Steel

Chemical synthesis of hollow sea urchin like nanostructured polypyrrole particles through a core–shell redox mechanism using a MnO2 powder as oxidizing agent and sacrificial nanostructured template

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