Materials Literature
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Only a small fraction of the high-dimensional parameter space that governs the occurrence of stable single-bubble sonoluminescence (SBSL) has been explored so far. We predict that decreasing the acoustic driving frequency $f$ upscales SBSL. More specifically, at $f\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}5\m…
The polymer absorption model developed by Vrentas and Vrentas is applied to the wool/water isotherm. In principle, all parameters in this model can be determined independently of sorption behavior so that a genuine prediction can be made. This model emphasizes the role of the glass transition in generating the sigmoid…
A Biopol-jute composite (BJC) was prepared using a hot-press treatment by reinforcing the Biopol polymer with hessian cloth (jute fabrics) placed in between the layers of Biopol polymer films. Both the tensile and bending strengths of the composite increased substantially, in comparison to the pure Biopol. Jute fabric…
The development of a cast forming process for ceramics based on agarose gelation is described and the properties of green and sintered bodies are presented. For this process, a warm alumina slurry containing more than 50 vol.-% solids loading and ∼1 wt-% agarose binder (Al2O3 basis) is cast into a relatively cold, non…
We have investigated the sorption behavior of polystyrene brushes with thicknesses of 10−200 nm in toluene vapor. The sorption curve displays a kink, which is attributed to the solvent-induced glass transition. The derivative of the sorption curve with respect to solvent activity (“osmotic capacity”) shows a glass ste…
The hydrolysis of functional trialkoxysilanes was studied under various conditions by 1 H NMR spectroscopy. The silane concentration was 1 - 2% by weight in a water/acetonesystem. Under these conditions, the reaction was found to be first order. In detail, influence of pH, grade of stirring, and size and structure of…
The decay of structural correlations in the classical one-component plasma is analyzed by calculating the poles of the Fourier transform of the total (pairwise) correlation function $h(r)$ for two integral equation theories, the soft mean spherical approximation and the hypernetted chain (HNC). We show that for all ex…
The effects of different sintering procedures on the preparation of antiferroelectric thick films and the structure–property relations in these films were studied. An acetic acid‐based sol–gel processing with multistep annealing and suitable lead oxide overcoat layers was developed to fabricate both niobium‐doped and…
Poly(L-lactic acid)-based microspheres having chemically reactive groups on their surfaces, MS(LAGA) and MS(LAGL), were prepared from the respective biodegradable L-lactic acid (LA)-depsipeptide copolymers, poly[LA-(Glc-Asp)] and poly[LA-(Glc-Lys)], having low contents of depsipeptide units, by an oil-in-water (O/W) e…
In contrast to most ionic minerals studied by SFM, the periclase (001) surface dissolves not by retreat of monolayer steps parallel to (001), but by retreat of a rough surface perpendicular to (001). At pH < 2, dissolution has an additional contribution from retreating macro-steps at the edges of nearly square pits…
SiC films were chemically vapor deposited onto graphite substrates using methyltrichlorosilane (MTS, CH 3 SiCl 3 ) as a source and argon or hydrogen as diluent gases to investigate the effect of each diluent gas on growth behavior and characteristics. Each diluent gas used had a relative difference in deposition rate…
This paper describes an experiment to ‘fine tune’ or reorient grain-boundary planes in the interior of a copper specimen after annealing in air, focusing on the Z-3 boundaries. The initial heat treatment consisted of annealing in air at 900°C for 1 h. This resulted in a population of Z-3 boundaries which was mainly di…
ZnO polycrystals doped with Li, Cu or Al were prepared by solid-state reactions and their cathodoluminescence (CL) and electron spin resonance (ESR) spectra were measured. A strong yellow emission centered at 2.0 eV was observed for the Al-doped specimen and its intensity was higher than that of the green emission obs…
Recently an analytical self-consistent mean-field theory was proposed for homopolymer adsorption in the long-chain limit. Here we make direct contact between that formalism and the numerical lattice model of Scheutjens and Fleer. The lattice layer closest to the wall is treated in a discrete manner, whereas a continuu…
Using a high resolution polarimeter, we have measured the temperature dependence of birefringence in the vicinity of smectic-A--smectic-${C}^{*},$ smectic-A--smectic-${C}_{\ensuremath{\alpha}}^{*},$ and smectic-A--smectic-${C}_{A}^{*}$ phase transitions of chiral smectics. We have observed a large pretransitional decr…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRemarkable Enhancement of Second-Order Nonlinear Optical Properties of Polynorbornenes Having Pendant Chromophores. Use of Hyper-Rayleigh Scattering to Estimate the Tacticity of Rigid Rod PolymersJitendra A. Sattigeri, Chung-Wai Shiau, Chia Chen Hsu, Fen-Fen Yeh, Sean…
A rarity in solid-state chemistry is octahedrally coordinated silicon. Ce16Si15O6N32 is the first nitridosilicate with this structural motif. Most oxosilicates containing octahedrally coordinated silicon are high-pressure phases. In contrast to that Ce16Si15O6N32 has been synthesized under ambient pressure. An SiN6 oc…
RATIONALE AND OBJECTIVES: The therapeutic gain of neutron capture therapy with a neutral macrocyclic gadolinium (Gd) complex (Gadobutrol) was evaluated through in vitro and in vivo studies in a beam of low-energy neutrons. METHODS: Neutron irradiation for both the in vitro and in vivo studies was performed in a beam o…
Near-infrared (NIR) excited surface-enhanced Raman scattering (SERS) has been measured for lysine (Lys) on gold colloid at pH 10.8 and 12.0 where its -amino group is ionized and both the α -and -amino groups are neutralized, respectively. The intensities of SERS signals from Lys are much stronger at pH 10.8 than at pH…
We report coherent inelastic neutron-scattering spectra for the network glass former ${\mathrm{B}}_{2}{\mathrm{O}}_{3}$ measured at temperatures from 100 to 1300 K ${(T}_{g}\ensuremath{\sim}525 \mathrm{K}).$ At the first sharp diffraction peak, which stems from the van der Waals packing of layerlike units, one finds a…