Materials Literature
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Polyelectrolyte multilayers containing electrochemically active viologen units have been constructed using the layer-by-layer deposition technique with poly(styrenesulfonate) and poly(butanylviologen) as polyanion and polycation, respectively. All redox active material is electrochemically addressable in multilayers m…
ABSTRACT Beeswax, candelilla wax, carnauba wax, and a high‐melting fraction of anhydrous milkfat were homogenized with whey protein to produce edible emulsion films. Lipid type and amount were important in controlling the emulsion film water vapor permeability (WVP). The WVPs of the beeswax and milkfat emulsion films…
Myofibrillar protein-based films were developed from a film-forming solution based on fish mince. Glycerol, sorbitol, or sucrose was incorporated as plasticizer at various concentrations. The increase in film solubility in water with plasticizer content reflect plasticizer solubility in water. Solubility in water of p…
Quantitative XPS and AES analysis of surfaces requires models to do fast calculations of the energy loss of electrons at any energy as they move in solids of general and non-uniform composition. This is possible with the Universal cross-section that was introduced a decade ago. A critical review is given of the Univer…
The rheological properties of colloidal suspensions of spheres, rods, and disks have been studied using a mesoscopic simulation technique, known as dissipative particle dynamics (DPD). In DPD, a suspension is modeled as a system of large colloidal particles in a liquid of interacting point particles. For the calculati…
An effective Hamiltonian for the ferroelectric transition in ${\mathrm{PbTiO}}_{3}$ is constructed from ab initio pseudopotential local-density-functional total-energy and linear-response calculations through the use of a localized, symmetrized basis set of ``lattice Wannier functions.'' Explicit parametrization of th…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTLigand-Unsupported Metal−Metal (M = Cu, Ag) Interactions between Closed-Shell d10 Trinuclear SystemsKuljeet Singh, Jeffrey R. Long, and Pericles StavropoulosView Author Information Department of Chemistry, Boston University Boston, Massachusetts 02215 Department of Che…
A rare surface freezing phenomenon is observed in molten normal alkanes, using x-ray and surface tension measurements. An ordered monolayer forms on the surface of the liquid alkane at temperatures up to 3 \ifmmode^\circ\else\textdegree\fi{}C above the bulk freezing temperature ${\mathrm{T}}_{\mathrm{f}}$. The structu…
Three types of amine-containing polyurethanes and poly(urethane−ureas), N -methyldiethanolamine (MDEA) and/or tetraethylenepentamine (TEPA) as the chain extender and poly(ethylene glycol) of MW 400 as the soft-segment component, have been studied by FTIR. The hydrogen bonding in hard and soft segments was examined for…
We report on the growth of GdCa 4 O(BO 3 ) 3 (GdCOB) and YCa 4 O(BO 3 ) 3 (YCOB) crystals and their characterization as new nonlinear optical materials. The crystals with good optical quality were grown by the Czochralski method. YCOB, the characteristics of which has not previously been reported to our knowledge, has…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe Dendritic Effect in Molecular Recognition: Ferrocene Dendrimers and Their Use as Supramolecular Redox Sensors for the Recognition of Small Inorganic AnionsChristine Valério, Jean-Luc Fillaut, Jaime Ruiz, Joëlle Guittard, Jean-Claude Blais, and Didier AstrucView Aut…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSelf-Assembly and Polymerization of Epoxy Resin-Amphiphilic Block Copolymer NanocompositesMarc A. Hillmyer, Paul M. Lipic, Damian A. Hajduk, Kristoffer Almdal, and Frank S. BatesView Author Information Department of Chemical Engineering and Materials Science, Universit…
We review the Kauzmann paradox and what it implies about the configuration space energy hypersurface for "structural glassformers." With this background, we then show how the relaxation expression of Adam and Gibbs qualitatively accounts for most of the phenomenology of liquid and polymeric glassformers including the…
Electrostatic alternate adsorption was successfully employed for low-molecular-weight dyes, leading to a large variety of dye−polyion layer-by-layer assemblies. The assembling process of individual dye−polyion layers of Congo Red (CR)−poly(diallyldimethylammonium chloride) (PDDA) was investigated by using a quartz cry…
Spherical particles of the mesoporous material MCM‐41 have been synthesized and are reported for the first time. The results of characterization of the samples by X‐ray diffraction, scanning electron microscopy, and nitrogen sorption at 77 K (which provides information about the pore system) is described. It is shown…
The behaviour of copper atoms in dilute solution in α-iron is important for the microstructural changes that occur in ferritic pressure vessel steels under fastneutron irradiation. To investigate the properties of atomic defects that control this behaviour, a set of many-body interatomic potentials has been developed…
The template method for preparing nanostructures entails synthesis of the desired material within the pores of a nanoporous membrane or other solid. A nanofibril or tubule of the desired material is obtained within each pore. Methods used previously to deposit materials within the pores of such membranes include elect…
PURPOSE: A phase II study of liposomal doxorubicin was conducted in patients with ovarian cancer who failed to respond to platinum- and paclitaxel-based regimens. Liposomal doxorubicin was selected as a result of its superior activity against ovarian cancer xenografts relative to free doxorubicin and activity in refra…
Thermoelectrics is an old field. In 1823, Thomas Seebeck discovered that a voltage drop appears across a sample that has a temperature gradient. This phenomenon provided the basis for thermocouples used for measuring temperature and for thermoelectric power generators. In 1838, Heinrich Lenz placed a drop of water on…
Abstract Analysis of the nonisothermal melt and cold crystallization kinetics of poly(aryl ether ether ketone ketone) (PEEKK) was performed by using differential scanning calorimetry (DSC). The Avrami equation modified by Jeziorny could describe only the primary stage of nonisothermal crystallization of PEEKK. And, th…