Showing papers in "Synthetic Metals in 1992"

TL;DR: In this article, the authors demonstrate the feasibility of processing, in the conducting form, polyaniline and a variety of polyblends made from polyanILine, which can be melt-processed or processed from solution to enable the fabrication of thin films, sheets, fibers, transparent conductive films, bulk parts.

TL;DR: In this paper, conditions used to synthesize polypyrrole with the chemical characteristics of the resulting polymer, and then to correlate these chemical characteristics with electronic and optical properties of the polymer.

TL;DR: In this article, a semi-empirical kinetic equation, − d [ AN ] dt = k 1 [ AN ][ APS ] + k 2 ′[ AN ][ P ], where [P] = equivalent concentration of polymer, is proposed for this autoaccelerated reaction.

TL;DR: In this paper, a blue-light-emitting tunneling structure (LETS) consisting of PPP confined between an indium/tin oxide (ITO) and an Al contact was investigated.

TL;DR: In this paper, electron spin resonance measurements of the protonated conducting form of polyaniline (PANI) in solution in non-polar or weakly polar organic solvents and as thin films cast from such solutions were reported.

TL;DR: In this paper, a correlation between conductivity, doping level and synthesis temperature was observed for polypyrrole perchlorate, showing that the positive charges preferentially localized on the nitrogen atoms which are adjacent to the doping anions, as opposed to being uniformly delocalized along the polymer backbone.

TL;DR: In this paper, the authors measured the drain current as a function of the source-drain bias for various source-gate voltages, which allowed the determination of the field effect mobility, μFET.

TL;DR: In this paper, the spectral properties of polycrystalline thin films of three conjugated oligothiophenes (quaterthiophene (α-4T), sexithiophene(α-6T), and octithiopane(α)-8T) have been studied over the temperature range 14-300 K.

TL;DR: In this paper, reflections associated with the stretch direction l = 1-7 were revealed using a combination of X-ray film exposures and detailed intensity mapping by various detector scans, indicating a monoclinic (or triclinic) unit cell.

TL;DR: In this paper, free-standing polyaniline films were doped with HCl, sulfuric acid (H2SO4), methane sulfonic acid (CH3SO3H), and p-toluenesulfonic acid(p-CH3C6H4SO3h), and their conductivity stability was examined at different elevated temperatures under different environments.

TL;DR: In this paper, a novel IR spectroelectrochemical cell was proposed to obtain IR spectra for pristine polypyrrole, which allows for electrochemical synthesis and IR and electrochemical analyses.

TL;DR: In this paper, the electrochemical redox mechanism of a dodecyl sulfate-doped polypyrrole was studied in detail by electrogravimetry using a quartz crystal microbalance.

TL;DR: In this paper, a poly( o -anisidine) was synthesized using chemical and electrochemical methods and it has been characterized by infrared spectroscopy and X-ray diffraction, showing that steric effects of the o -methoxy substituent do not hinder polymer crystallization.

TL;DR: In this paper, a polyaniline was electrochemically synthesized in aqueous 0.2 N poly(styrenesulfonic acid) solution and the electrochemical properties, such as redox kinetics with respect to the pH of the electrolytic medium and the effect of film thickness, were investigated by cyclic voltammetry and coulometry.

TL;DR: In this paper, it was concluded that water influences the crystal structure of PANI and in this way changes its conductivity, which can be used to study the interaction of water vapour with an emeraldine form of polyaniline.

TL;DR: In this article, a polyaniline containing anions of phosphotungstic acid has been prepared in a one-step reaction involving oxidation of aniline with ammonium persulfate in the presence of PPI.

TL;DR: In this paper, it was shown that the shift in peak potentials is logarithmic as a function of both wait-time and scan rate, and the steady-state wave can be defined as a relaxed wave for a particular wait time.

TL;DR: In this article, focused laser light of wavelength 442 nm was used to induce photochemical crosslinking in thin films of poly(3-hexylthiophene). Irradiated regions were insoluble and thus patterns of micron resolution could be achieved by dissolution of unexposed regions.

TL;DR: A new organic metal (ET) 2 TlHg(SCN) 4 has been synthesized in this paper, and the X-ray study showed the compound to be isostructural to (ET 2 MHg (SCN 4 ) salts with M = K, NH 4 and Rb.

TL;DR: In this article, the Wessling bissulfonium salt route was used to polymerize α -chloro- α '-alkyl(aryl)sulfinyl- and α'sulfonyl-p -xylenes.

TL;DR: In this article, the electrochemical response of a polyaniline (PANI) film to dissolved hydroquinone and Fe 2+ was examined, and the PANI film electrocatalyzed the electrode reactions of not only Fe 2+, but also hydro-quinone.

TL;DR: In this article, an interfacial polymerization of polypyrrole polymers was applied to aluminum to form Al/poly pyrrole Schottky barriers, which showed better rectification than previous metal/polypyryl-polypolypolymer poly(poly(poly) poly(n) (POP) Schottk) barriers.

TL;DR: In this paper, Schottky diodes of aluminium/poly(3-alkylthiophene) (P3AT)/indium-tin oxide (ITO) with large area (0.15-0.5 cm 2 ) are prepared using the proposed new casting technique.

TL;DR: In this article, a series of polypyrrole films doped with p -toluene sulfonate was investigated by examining the effect of film thickness (12-68 μm) and temperature (70-150 °C) on the rate of decay of electrical conductivity.

TL;DR: The use of a pulsed electrochemical potential in the growth of polypyrrole films leads to enhancements in the resultant electrical conductivity, molecular anisotropy and surface smoothness as compared to equivalent films synthesized under constant potential conditions as mentioned in this paper.

TL;DR: In this paper, a series of copolymers containing differing proportions of pyrrole and N-methyl polypyrrole were prepared electrochemically at various temperatures using acetonitrile as the solvent.

TL;DR: In this paper, thin films of polypyrrole (PPy) containing tetrasulfonated metallophthalocyanine anions (MTsPc 4−, MCu, Ni and Co) were prepared electrochemically from aqueous solution in a single-compartment cell.

TL;DR: In this paper, the authors used steady state photoinduced absorption to study the long-lived photoexcitations in the conjugated polymer poly(2-methoxy, 5-(2′-ethylhexyloxy)- p -phenylene vinylene) (MEH-PPV) as a dilute component in ultrahigh molecular weight polyethylene (PE) oriented by gel-processing.

TL;DR: In this paper, the protonations of the emeraldine (EM) oxidation state of polyaniline (PAN) by nonvolatile protonic acids, such as H2SO4 and HClO4, have been studied by X-ray photoelectron spectroscopy.