Highly conductive free standing polypyrrole (PPy) films were prepared by a novel freezing interfacial polymerization method. The films exhibit metallic luster and electrical conductivity up to 2000 S cm(-1). By characterizing with SEM, FTIR, Raman and XRD, the high conductivity is attributed to the smooth surface, higher conjugation length and more ordered molecular structure of PPy.

Polypyrrole (PPy) encapsulated 3D flower-like NiO was prepared to investigate the role of PPy coating for high-performance electrodes. NiO@PPy showed a better electrochemical performance than pure NiO, and a "trade-off effect" between electrical conductivity and ion diffusion resistance was observed with different PPy coating thickness.

The effect of oxidation on the energetics and structure of thiophene (Th) oligomers is studied with density functional theory at the B3PW91∕6-311++G(d,p) level. Neutral n-Th oligomers (2 < n < 13) are gently curved planar chains. Ionization potential and electron affinity results show that n-Th oligomers are easier to be oxidized as their chain length increases. Oxidation states +2, +4, +6, and...

Electrooxidation of methanol was realised on platinum and perchlorate anion doped polypyrrole film electrodes in acidic media. A systematic kinetic investigation was performed and optimum experimental conditions for the preparation of the electrocatalytic system were determined. The presence of ClO4 − anions was confirmed by XPS analysis of the doped polymer matrix. © 2001 Elsevier Science B.V....

In this work, chemical oxidation was used to polymerize conjugated polymer "Polypyrrole" at room temperature Graphene nanoparticles were added by in situ-polymerization get (PPY-GN) nano. Optical and Electrical properties studied for the nanocomposites. optical of nanocomposites UV-Vis spectroscopy wavelength range (200 -800 nm). The result showed absorption spectra normally determined that max...

Title of Dissertation: FABRICATION AND CHARACTERIZATON OF POLYPYRROLE/GOLD BILAYER MICROACTUATORS FOR BIO-MEMS APPLICATIONS Yingkai Liu, Ph.D., 2005 Directed By: Professor Elisabeth Smela Department of Mechanical Engineering The proof of concept for conjugated polymer bilayer microactuators had been demonstrated prior to this dissertation with numerous devices, and their advantages in biomedica...

The porosity of activated carbons may be modulated via pre-mixed precursors containing polypyrrole and air-carbonised biomass to ultra-high surface area high packing density suitable for enhanced all-round methane storage.

We have synthesized polyacrylamide-polypyrrole (PPy/PA) microparticles which present conductivity in the range of the semiconductor materials (around 10 S/cm). Glucose Oxidase was immobilized within microparticles with composition 50/50 (w/w) PPy/PA. These microparticles were used as biological component of an amperometric biosensor which shows similar glucose response in both aerobic and anaer...

Polypyrrole nanoparticles (PPy NPs) exhibit strong absorption in the near infrared (NIR) region. With an excellent photothermal efficiency of ~45% at 808 nm, sub-100 nm PPy NPs are demonstrated to be a promising photothermal agent for in vivo cancer therapy using NIR irradiation.

We are using microactuators based on a conducting polymer, polypyrrole, and demonstrate here a scheme to make true three-dimensional movements. We present a complementary microfabrication method, which was developed in order to create individually addressable and controllable PPy/Au actuators. Using these individually controlled microactuators we are able to obtain movements both out of and in ...