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Solid films of C60 and C70 fullerenes are evaluated in propylene carbonate/lithium perchlorate, an electrolyte commonly used in lithium batteries. Cyclic voltammetry, chronopotentiometry, and an effusion test, show that reduced C60 and...
The cyclic voltammetry of ultrathin fihns of polyacetylene comprised of 2-3 nm micro fibrils and their aggregate 20 nm fibrils in methylene chloride, acetonitrile, propylene carbonate, and sulfo]ane shows many similarities, including a...
A portable sample housing has been constructed for room-temperature powder geometry X-ray diffraction analysis of samples that are air or moisture sensitive. The housing can be easily handled in a glovebox, providing a means for direct...
The corrosion of stainless steel under anodic conditions in salt solutions was strongly suppressed by an ultrathin layer of polyelectrolyte complex, applied using the layer-by-layer deposition method. Voltammetric scans over a wide...
Amorphous hydrated complexes of the polyelectrolytes poly(styrene sulfonate) (PSS) and poly(diallyldimethylammonium) (PDADMA) were doped with the spin-5/2 ion Mn2+. Xband electron paramagnetic resonance (EPR) measurements of the Mn2+...
The adhesion of living eukaryotic cells to a substrate, one of the most complex problems in surface science, requires adsorption of extracellular proteins such as fibronectin. Thin films of polyelectrolyte complex made layer-by-layer ...
A coordinated study on electrochemical, magnetic, optical, and transport properties of poly(1, 4- dimethoxy phenylene vinylene) (PDMPV) using in situ electrochemical doping techniques is presented. Properties are correlated through a...
Polyelectrolyte multilayers (PEMUs) are made from various combinations of polyanions and polycations. It is now understood that these ultrathin films of polyelectrolyte complex may also incorporate counterions derived from the solution...
We have measured the Seebeck coefficient and electric conductivity in the air-stable conducting polymers polyaniline and polypyrrole at different doping levels. We find, at 300 K, the general correlation that the logarithm of the...
The measured cyclic voltammogram of a polyacety]ene-coated electrode bathed in an electrolyte solution was simulated numerically for various scan rates. The model used accounts for a modified Butler-Vo]mer-type heterogeneous kinetics at...
Hydrated polyelectrolyte complexes, H-PECs, have recently started attracting renewed interest as a class of highly solvated/plasticized blends. H-PECs are observed to undergo a transition in mechanical properties close to room...
The charge storage capacity and electrical conductivity of polypyrrole are followed through regimes of chemically reversible and irreversible electroactivity. Overoxidation of polypyrrole occurs at potentials in excess of 0.7 V vs. a...
Polyelectrolyte multilayers were constructed from a polyviologen and poly(styrene sulfonate) using an alternating polyion solution deposition technique. In situ absorption spectroscopy showed multilayers to be strongly electrochromic....
Polyelectrolyte complexes or coacervates, PECs, represent one of the many families of ion-containing polymers proposed or in use for applications requiring mobile ions, including fuel cells, water purification, and rechargeable batteries...
The magnetic and transport properties of polyacetylene electrochemically oxidized in the presence of perchlorate ion have been determined. Room temperature dc conductivity is unaffected by doping between 10 -6 < y -< 10 -3~. A rapid...
We report an ion-conducting device comprising an ultrathin polyelectrolyte multilayer membrane assembled in a simple manner with water soluble polymers. Under the influence of external solution ionic strength ~salt concentration!, sites...
Under normal physiological conditions, mature human coronary artery smooth muscle cells (hCASMCs) exhibit a "contractile" phenotype marked by low rates of proliferation and protein synthesis, but these cells possess the remarkable...
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