Materials Literature
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Two Ni/Al 2 O 3 samples prepared using incipient wetness impregnations with and without argon glow discharge plasma treatment were tested for methane decomposition to H 2 and carbon nanofibers. The plasma treatment induces a significant change in properties of catalytic methane decomposition. The plasma-treated sample…
Abstract Environmentally‐responsible materials processing is becoming an important global consideration in a wide variety of technologies, especially those wherein volatile and/or residual organic solvents cannot be tolerated. In this context, polymer processing has benefited tremendously from advances achieved using…
We synthesized 1,2,3-triazole-linked azobenzene dendrons of four generations. No protection−deprotection approach was needed during the generation development via click reaction. The photoisomerization of azobenzene dendrons was studied using UV–vis spectra. The cis isomers of these dendrons were more stable than tran…
Low-protein-fouling poly(ethylene glycol) (PEG-like) plasma polymer films were prepared using radio frequency glow discharge polymerization of diethylene glycol dimethyl ether (DGpp) on top of a heptylamine plasma polymer primer layer. By varying the plasma deposition conditions, the chemistry of the DGpp film was inf…
We report the experimental demonstration of a large fabrication tolerance for a single-layer, highly reflective high-index-contrast subwavelength grating (HCG) mirror. HCG vertical-cavity surface-emitting lasers (VCSELs) are demonstrated with plusmn20% variation in the HCG critical dimension. Emission wavelength of th…
We describe a time-domain simulation technique for nonlinear hysteretic transformer behavior based on the Jiles-Atherton model but with variable parameters. The normal Jiles-Atherton model assumes its parameters are independent of the applied maximum (peak) magnetic field intensityHmax. In this paper, we demonstrate t…
A comparison is made of the quantitative detection of a labeled antibody by surface-enhanced resonance Raman scattering (SERRS) and by fluorescence using the same instrument with the same laser excitation source. The area under the curve for the fluorescence band is greater than for any single peak in the SERRS spectr…
The emissivity and the catalytic efficiency related to atomic oxygen recombination were investigated experimentally in the range 1000–2000 K for ZrB 2 and ZrB 2 –HfB 2 ‐based ceramics. In order to evaluate the effect of the machining method, two series of samples, one prepared by electrical discharge machining and the…
In this study we applied Rheo-NMR to investigate the structural change of Bombyx mori silk fibroin in aqueous solution under shear. Monitoring the time dependence of 1H solution NMR spectra of silk fibroin subjected to constant shear strain, signal intensities of random coil decreased suddenly during shear while peaks…
An experimental evidence of a remarkable enhancement of strain-induced crystallization in natural rubber nanocomposite under uniaxial stretching, due to the presence of nanoclay particles, is described. Synchroton wide-angle X-ray diffraction (WAXD) have been used to monitor structure changes and crystallinity develop…
The force, f, required to slide a drop past a surface is often considered in the literature as linear with the drop width, w, so that f/w = const. Furthermore, according to the Dussan equation for the case that the advancing and receding contact angles are constant with drop size, one can further simplify the above pr…
We compare the time evolution of striped pattern correlation lengths for three different poly(styrene-$b$-methyl methacrylate) $(\mathrm{PS}\text{\ensuremath{-}}b\text{\ensuremath{-}}\mathrm{PMMA})$ diblock copolymer materials having comparable molecular diffusion rates. Striped patterns formed from cylindrical-phase…
A kilogram scale, divergent and iterative synthesis of a second generation, triazine dendrimer with 12 protected amines on the periphery using common laboratory equipment is reported. The route benefits from common reaction conditions, inexpensive reagents, and aqueous solvents. From the monomers, the desired product…
Oxynitride glasses are grain boundary phases within silicon nitride ceramics. The desire to understand their nature led to various investigations on oxynitride glass formation, structure, properties, and crystallization. This paper provides a review of oxynitride glasses and outlines the effect of glass chemistry, inc…
The reaction of bis(3,5-di- tert -butylpyrazol-1-yl)methane (bdtbpzm) with Bu n Li and carbodiimide derivatives, namely, N, N′ -diisopropyl and 1- tert -butyl-3-ethyl carbodiimides, gives rise to the new sterically hindered lithium acetamidinate [Li(tbp t amd)(THF)] ( 1 ) [tbp t amd = N- ethyl- N′ - tert -butylbis(3,5…
Isophlorins and its analogues bridge the structural features between porphyrins and annulenes. Invariably they are known to be unstable but can be stabilized by appropriate substituents in the core and periphery of a macrocycle. Solid-state characterization of these 20pi systems displays planarity for each macrocycle…
The Fe storage protein ferritin was used as a size-constrained reaction vessel for the photoreduction and reoxidation of complexed Eu, Fe, and Ti precursors for the formation of oxyhydroxide nanoparticles. The resultant materials were characterized by dynamic light scattering, gel electrophoresis, UV-vis spectroscopy,…
Miscible blends containing poly(ethylene oxide) (PEO) have been examined over the entire composition range using differential scanning calorimetry to explore further the reported presence of two glass transitions. Three systems, poly(ethylene oxide)−dimethyl ether (PEO−DME)/poly(methyl methacrylate) (PMMA), PEO/poly(l…
Coexistence of the ferroelectric polarization and spontaneous magnetization has been found in Y-type hexaferrite Ba 2 Mg 2 Fe 12 O 22 . The reversal of magnetization by a small magnetic field below ∼0.02 T accompanies an electric polarization reversal through the clamping of ferrimagnetic and ferroelectric domain wall…
Utilization of wastes from agriculture is becoming increasingly important due to concerns of environmental impact. The goals of this work were to evaluate the ability of an unusual organism, Saccharophagus degradans (ATCC 43961), to degrade the major components of plant cell walls and to evaluate the ability of S. deg…