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Actuation of polypyrrole nanowires
Nanotechnology, 2008Nanoscale 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 +5 more
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Electrodeposition of polypyrrole-heparin and polypyrrole-hydroxyapatite films
Materials Letters, 2011Abstract 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 +4 more
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Hydrogel-reinforced polypyrrole electroactuator
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2016Robust electroactuators that are lightweight, power-efficient and capable of generating high forces at a low actuation voltage are of great demand in the design of micro-electromechanical systems (MEMS) for biomedical applications. In this work, electroactive composite films of alginate hydrogel and polypyrrole/polyethylene glycol (PPy/PEG) are ...
, Yongchen Wang +3 more
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Ion transport in polypyrrole and a polypyrrole/polyanion composite
The Journal of Physical Chemistry, 1993The 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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Junction properties of aluminum/polypyrrole (polypyrrole derivatives) Schottky diodes
Applied Physics Letters, 1997The current–voltage characteristics of Schottky junctions formed by using aluminum on polypyrrole, poly(N-methyl pyrrole) and the copolymer poly(N-methyl pyrrole–pyrrole) have been investigated. The formation of the junctions has been confirmed by capacitance–voltage characteristics and Chot plots.
Ramadhar Singh, Amarjeet K. Narula
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Polypyrrole–oxalate and polypyrrole–sulfate electrodes for supercapacitor applications
Chemical PapersPolypyrrole-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 +2 more
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Conductivity enhancement in raw polypyrrole and polypyrrole nanoparticle dispersions
Polymers for Advanced Technologies, 2006AbstractFor certain commercial applications of polypyrrole (PPy), an enhancement of the electrical conductivity of the material is the key to industrial success. In this paper it will be shown that raw PPy with high conductivity (>150 S/cm) can be obtained in very good yield (>90%) by appropriate selection of both bi‐functional additives and ...
José‐Adolfo Pomposo +5 more
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Encapsulated polypyrrole actuators
Synthetic Metals, 1999Abstract Conducting polymer-based actuators undergo volumetric changes as they are oxidized or reduced, from which mechanical work can be obtained. Polypyrrole [Q. Pei, O. Inganas, Advanced Materials 4 (1992) 277; Q. Pei, O. Inganas, Journal of Physical Chemistry 96 (1992) 10508; E. Smela, O. Inganas, Q. Pei, I. Lundstrom, Advanced Materials 5 (1993)
John D. Madden +4 more
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Characterization of Polypyrrole
Molecular Crystals and Liquid Crystals, 1985Abstract The renewed interest in the conducting polymer polypyrrole in 1968 was due to the efficient electrochemical synthesis of the polymer which made it possible to grow thin films with appropriate mechanical properties to facilitate the characterization of the polymer.
A. I. Nazzal, G. B. Street, K. J. Wynne
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Conducting mesomorphic polypyrroles
Synthetic Metals, 1999Abstract Side-end and side-on liquid crystal pyrrole monomers and polymers are synthesised thanks to a mastered process. An original way of polymerisation allows to obtain `in situ' oriented polymers. Each polymer receives either a planar or an homeotropic orientation of its mesogens.
B. Faye, M. Mauzac, J.P. Parneix
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