Ordering and stability in conducting polypyrrole

Cheah, K; Forsyth, Maria; Truong, Van-Tan

doi:10.1016/s0379-6779(98)00006-x

Cited by 172 publications

(96 citation statements)

References 17 publications

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“…2(b)) and the corresponding FWHM is found to be 0.31°. This observed XRD peak is much sharper than those reported previously (FWHM 10°) for PPy [8], [17], [20] and [21]. The calculated d-spacing using Bragg's equation on our PPy films deposited on copper modified aluminium surfaces is found to be 3.8 Å and this value is consistent with those reported previously [8] and [21].…”

Section: Methodssupporting

confidence: 90%

Electrochemical synthesis of highly ordered polypyrrole on copper modified aluminium substrates

Ashoka¹,

Noormohammed²,

Sarkar³

2014

Applied Surface Science

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Highlights• Highly ordered polypyrrole has been synthesized on Cu modified Al surface.• A model for ordered polypyrrole growth on Cu modified Al surface has been proposed.• Polypyrrole ordering on Cu(1 0 0) plane is due to the similar inter-monomer distance of PPy with Cu-Cu inter-atomic distance. AbstractFabrication of highly ordered conducting polymers on metal surfaces has received a significant interest owing to their potential applications in organic electronic devices. In this context, we have developed a simple method for the synthesis of highly ordered polypyrrole (PPy) on copper modified aluminium surfaces via electrochemical polymerization process. A series of characteristic peaks of PPy evidenced on the infrared spectra of these surfaces confirm the formation of PPy. The X-ray diffraction (XRD) pattern of PPy deposited on copper modified aluminium surfaces also confirmed the deposition of PPy as a sharp and intense peak at 2θ angle of 23° attributable to PPy is observed while this peak is absent on PPy deposited on as-received aluminiumsurfaces. An atomic model of the interface of PPy/Cu has been presented based on the inter-atomic distance of copper-copper of (1 0 0) plane and the inter-monomer distance of PPy, to describe the ordering of PPy on Cu modified Al surfaces.

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Section: Methodssupporting

confidence: 90%

Electrochemical synthesis of highly ordered polypyrrole on copper modified aluminium substrates

Ashoka¹,

Noormohammed²,

Sarkar³

2014

Applied Surface Science

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“…In Fig. 2a, the characteristic peak of PPy can be observed at 16º, which corresponds to pyrrole counter ion or intercounter ion interaction scattering, while the peak at 22.8º is assigned to the PPy chain that is close to the inter-planar Van de Waals distance from the aromatic groups [22].…”

Section: Resultsmentioning

confidence: 99%

Potentiostatically deposited polypyrrole/graphene decorated nano-manganese oxide ternary film for supercapacitors

Lim

Tan

Lim

et al. 2014

Ceramics International

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractA simple method based on potentiostatic polymerization was developed for the preparation of ternary manganese oxide-based nanocomposite films. The ternary nanocomposites, which were characterized using x-ray diffraction spectroscopy and x-ray photoelectron spectroscopy, showed that the manganese oxide within the film consisted of MnO 2 and Mn 2 O 3 . Electrochemical measurements showed that the ternary nanocomposite electrode exhibited high specific capacitance (up to 320.6 F/g), which was attributed to the morphology of a polypyrrole/graphene/manganese-oxide (PPy/GR/MnO x ) ternary nanocomposite. The experimental approach maximized the pseudocapacitive contribution from redox-active manganese oxide (MnO x ) and polypyrrole (PPy), as well as the electrochemical double layer capacitive (EDLC) characteristic from graphene (GR) sheets. Long cyclic measurements indicated that the specific capacitance of the ternary nanocomposite film could retain 93% of its initial value over 1,000 charge/discharge cycles, in the potential range of -0.2 to 0.7 V vs. silver/silver chloride electrode (Ag/AgCl).

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“…broad peak was observed at about 2θ = 24˚ .The broadpeak is characteristic of amorphous PPy [20] and are due to the scattering from PPy chains at the interplanar spacing [21]. The average chain separation can be calculated from these maxima using the relation [22][23][24][25].…”

Section: Xrd Analysismentioning

confidence: 99%