Materials Literature
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In this paper, we investigate the final morphology of photocured polyurethane acrylates based on polypropylene oxide by means of Transmission Electron Microscopy (TEM), Small Angle X-ray Scattering (SAXS), and dynamic mechanical measurements. Two interrelated structural features on two different size scales can occur…
This article describes a new kind of electrostatic charged particle analyzer capable of the parallel detection of a large kinetic energy range. The main purpose envisaged is for the simultaneous detection of electrons scattered from surfaces and having energies between a few tens of eV to greater than 2000 eV. A proto…
Abstract Polymerizable gelator 1 which has two diacetylene groups as well as two amide groups showed an excellent gelation ability for many organic solvents. Photoirradiation readily induced polymerization in the gel phase but the polymerization results were dependent upon the gelation solvent. It was shown that the t…
That there is no valence variation of Fe and Cr ions in stoichiometric spinel ${\mathrm{FeCr}}_{2}{\mathrm{S}}_{4}$ is directly proved by the experiments of powder x-ray diffraction, transmission electron microscopy, M\"ossbauer spectrum, x-ray photoelectron spectroscopy, and electron-spin resonance. These results con…
La 4 Cu 3 MoO 12 is a new (ABO 3 ) n =4 cuprate with mixed B -cations in a ratio of 1:3. When synthesized at ambient pressure, the structure is not perovskite as expected but rather a homeotype of YAlO 3, a rare-earth hexagonal phase. While the P 6 3 / mmc and Pmnm space groups can be used to model average structures…
Lead magnesium niobate (PMN) of high sintered density has been successfully prepared by a mechanochemical fabrication technique from mixed oxides of PbO, MgO, and Nb 2 O 5 . The novel technique skips the phase‐forming calcination steps at intermediate temperatures that are almost always required in the most widely emp…
A procedure for designing binary diffractive lenses by use of pulse-width-modulated subwavelength features is discussed. The procedure is based on the combination of two approximate theories, effective-medium theory and scalar diffraction theory, and accounts for limitations on feature size and etch depth imposed by f…
A metal-organic chemical vapor deposition process has been developed for the growth of amorphous tungsten nitride thin films for barrier layer applications in ultralarge scale integration copper interconnect schemes. The process employs tungsten hexacarbonyl, [W(CO)6] and ammonia (NH3) as, respectively, the tungsten a…
Immobilization of lactate dehydrogenase (LDH) has been carried out on electrochemically prepared polyaniline (PANI) films. The results of the photometric and amperometric response measurements conducted on such LDH/PANI electrodes show the response time as 90 s and shelf-life as about two weeks at 4–10 °C indicating t…
Bridging stresses that result both from elastic tractions and frictional interlocking in the wake of an advancing crack have been evaluated quantitatively via in situ Raman microprobe spectroscopy in a toughened Si 3 N 4 polycrystal. Crack opening displacement (COD) profiles of bridged cracks also have been measured q…
Polypeptide surfaces are regarded as key compounds; e.g. for the control of biomimetic steps in biomineralization processes. Here is described the application of microcontact printing in the patterning of gold surfaces with monolayers of an initiator, which was used to polymerize a thin layer of polypeptide. The Figur…
This study examines how the relative role of coalescence suppression and interfacial tension reduction influence the particle size at various levels of in situ compatibilization. The polymers studied are polyethylene terephthalate (PET) as matrix and a polypropylene (PP) as dispersed phase compatibilized by a triblock…
The electron-energy-loss near-edge structures (ELNES) of the B $K,$ C $K,$ and N $K$ ionization edges of different phases in the boron-carbon-nitrogen (B-C-N) system are calculated using a multiple scattering (MS) approach. A comparison of calculated and experimental spectra for cubic diamond, graphite, cubic $(c$-BN)…
A new photoswitchable peptide system composed of two flat, ring-shaped cyclic octapeptides with the sequence cyclo -[( l -Phe- d - Me N -Ala) 3 - l -Cys- d - Me N -Ala] tethered via an azobenzene moiety was investigated at the air−water interface, on mica, germanium, and quartz glass supports. Surprisingly, both the E…
PURPOSE: To estimate the toxicity and response rate of high-dose liposome-encapsulated doxorubicin (TLC D-99, Evacet, The Liposome Company Inc, Princeton, NJ) in patients with advanced breast cancer. PATIENTS AND METHODS: Fifty-two breast cancer patients with bidimensionally measurable metastatic disease and no prior…
The angular and velocity distributions of desorbing N2, N2O, and NO molecules were studied in the decomposition of NO and also N2O on a palladium (110) surface by means of angle-resolved thermal desorption combined with cross-correlation time-of-flight techniques. The results were quite similar in both cases although…
A long-standing goal of biomedical device development has been the generation of specific, desired host blood and tissue responses. An approach to meeting this design criteria is precise surface modification that creates micropatterns of distinct physicochemical character to direct cell adhesion and behavior. For this…
We have used a first-principles, density-functional-based method to calculate the electric polarizabilities and dipole moments for several low-energy geometries of Si clusters in the size range $10<~N<~20$. The polarizability per atom is found to be a slowly varying, nonmonotonic function of N. Over this size ra…
The rigid-rod model is capable of predicting several rheological features of rodlike polymers in the nematic phase. The model is formulated in terms of a nonlinear partial differential equation that describes the evolution of an orientational distribution function. The morphological properties and the rheological resp…
The endothermal steam reforming reaction of methane within the anode chamber of solid oxide fuel cell (SOFC) stack (internal reforming) is favorably applied to reduce cost and improve the thermal balance within the stack, This reaction, catalysed by the Ni/YSZ anode material (substrate), is very fast and influences th…