Results 161 to 170 of about 31,626 (207)

Ion transport in polypyrrole and a polypyrrole/polyanion composite

The Journal of Physical Chemistry, 1993
The ionic conductivities of polypyrrole/poly(styrenesulfonate) (PPY/PSS) and polypyrrole perchlorate (PPY/ClO 4 - ) films on electrodes have been measured in 0.2 M NaClO 4 (aq) as a function of oxidation level by impedance spectroscopy. As the oxidation level is increased, the ionic conductivity of PPY/ClO 4 - increases, while that of PPY/PSS ...
Xiaoming Ren, Peter G. Pickup
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Polypyrrole

2009
Abstract Major Applications There are potential applications for PPy in display devices, chemical sensors, electrodes in batteries, drug carriers, heating fabrics, deionizers, and as a catalyst. Properties Of Special Interest Presence of an extended π–bonding system, which imparts electrical properties to the polymer.
Amit S Kulkarni, Shrish Rane, Gregory Beaucage   +2 more
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INDIUM/POLYPYRROLE(POLYPYRROLE DERIVATIVES) SCHOTTKY JUNCTIONS

Journal of Macromolecular Science, Part A, 2001
Samples of polypyrrole, poly(N-methyl pyrrole) and their copolymer poly(N-methyl pyrrole-pyrrole) have been prepared by electrochemical polymerization technique. Their conductivity values have been optimized for fabricating indium-polymer Schottky junctions.
Amarjeet Kaur, Ramadhar Singh
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Electrodeposition of polypyrrole-heparin and polypyrrole-hydroxyapatite films

Materials Letters, 2011
Abstract Composite films containing heparin and hydroxyapatite in a polypyrrole (PPY) matrix were electrochemically deposited as monolayers or bi-layers on conductive substrates. The deposition on stainless steel substrates was achieved using a thin prime layer of PPY deposited by anodic electropolymerization in the presence of salicylate anions ...
R. Ma, K.N. Sask, C. Shi, J.L. Brash, I. Zhitomirsky   +4 more
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Actuation of polypyrrole nanowires

Nanotechnology, 2008
Nanoscale actuators are essential components of the NEMS (nanoelectromechanical systems) and nanorobots of the future, and are expected to become a major area of development within nanotechnology. This paper demonstrates for the first time that individual polypyrrole (PPy) nanowires with diameters under 100 nm exhibit actuation behavior, and therefore ...
Alexander S, Lee, Serban F, Peteu, James V, Ly, Aristides A G, Requicha, Mark E, Thompson, Chongwu, Zhou   +5 more
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The deposition of globular polypyrrole and polypyrrole nanotubes on cotton textile

Applied Surface Science, 2015
Cotton textile was coated with polypyrrole in situ during the oxidation of pyrrole with iron(III) chloride in aqueous medium. Such polymerization results in the globular polypyrrole coating of fibres. In the presence of methyl orange, the coating with polypyrrole nanotubes was obtained. Nanotubular polypyrrole is more conducting and more stable towards
Patrycja Bober, Jaroslav Stejskal, Ivana Šeděnková, Miroslava Trchová, Lenka Martinková, Jan Marek   +5 more
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Drude Metallic Response of Polypyrrole

Physical Review Letters, 1995
The very highly conducting state of polypyrrole is investigated. A Drude metallic response, similar to the behavior of usual metals, is determined, based on the coincidence of dc and microwave conductivities, measurement of a huge and negative microwave dielectric constant, and the optical determination of an unusual plasma frequency in the far ir ...
Kohlman, R.S., Joo, J., Wang, Y.Z., Pouget, J.P., Kaneko, H., Ishiguro, T., Epstein, A.J.   +6 more
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Polypyrrole–oxalate and polypyrrole–sulfate electrodes for supercapacitor applications

Chemical Papers
Polypyrrole-oxalate (PPy-O) electrodes were electropolymerized from the oxalate solutions containing oxalic acid and pyrrole (Py) monomer. The structural, electrochemical and capacitive behaviors were studied depending on the monomer concentration, the applied current density and the film thickness.
Murside Haciismailoglu, Dilek Vatansever, Mursel Alper   +2 more
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Synthesis and Characterization of Polypyrrole and Graphene/Polypyrrole/Epoxy Composites

Arabian Journal for Science and Engineering, 2016
Conducting polypyrrole (PPy) nanoparticles were synthesized via four different radical polymerization systems changing the time and other parameters. The characterization of PPy nanoparticles was done by Fourier transform infrared spectrometer. Graphene was synthesized from intercalated graphite by exfoliation at 1000\({^{\circ}}\) C for 30 s in tube ...
Sumaira Nosheen, Mohsin Ali Raza, Shahzad Alam, Muhammad Irfan, Asma Iftikhar, Farooq Iftikhar, Bilal Waseem, Zaheer Abbas, Badarudin Soomro   +8 more
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Impedance of polypyrrole perchlorate/polypyrrole poly(styrenesulfonate) bilayers

The Journal of Physical Chemistry, 1993
The impedance of polypyrrole perchlorate/polypyrrole poly(styrenesulfonate) bilayers on Pt electrodes as a function of the electrode potential and the relative thickness of the two layers demonstrates conclusively that the redox reaction begins in the outer layer, at the polymer/solution interface.
Xiaoming Ren, Peter G. Pickup
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