Materials Literature
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Abstract Recently it has been shown that the strain hardening modulus ( G p ) at 80°C can be used to predict the environmental stress cracking (ESC) resistance of polyethylenes. The advantage of using strain hardening to determine ESC resistance is that the data may be obtained relatively easily and quickly using simp…
The hollandite structure-type has received considerable attention as a nuclear waste form for the incorporation of radioactive 135 Cs and 137 Cs, both of which are important fission product radionuclides in the high-level nuclear waste generated by the reprocessing of used nuclear fuel. A critical concern has been the…
We report density functional studies of the structure and dynamics of $\mathrm{Na}\mathrm{Mg}{\mathrm{H}}_{3}$, $\mathrm{K}\mathrm{Mg}{\mathrm{H}}_{3}$, and $\mathrm{Rb}\mathrm{Mg}{\mathrm{H}}_{3}$ in the cubic perovskite structure as well as the corresponding fluorides and the alloy $(\mathrm{Na},\mathrm{Li})\mathrm{…
Abstract Polyaniline (PANi) nanowires and nanotubes are processed by electrospinning. Nanowires are electrospinned using PANi/PEO and PANi/PMMA polymer blends. The morphology and composition of these nanofibers are determined by scanning electron microscopy (SEM) and Nano‐Secondary Ion Mass Spectrometry (Nano‐SIMS). T…
Abstract— The first commercial use of the Zenithal Bistable Display (ZBD™) is for electronic point‐of‐purchase (epop™) signage in the retail sector. As a reflective bistable display, this novel LCD technology only consumes power if new information is required and the image is updated. This allows complex images to be…
The adhesion, stability, and wetting behavior at interfaces between thin Cu films and clean Ta (110) substrates are investigated by first-principles calculations using density functional theory (DFT) in the local-density approximation. Interfaces between pseudomorphic body-centered-tetragonal thin films of Cu, straine…
Abstract Sulfolane was acted as a kind of diluent to prepared PVdF porous membranes via TIPS process. Its impact on structure and morphology was studied. Phase diagram for this system was determined by different scanning calorimetry (DSC). Not any structure in the region higher than the dynamic crystallization tempera…
Abstract The aim of this article was to investigate the nucleating ability of different nucleating agents for the foaming of poly(ε‐caprolactone), a biodegradable, semicrystalline polymer. In particular, the efficiency of the nucleating agent in inducing the formation of the gaseous phase has been compared to the effi…
Despite intensive investigations over the past five decades, the microscopic origins of the fascinating dielectric properties of ABO3 relaxor ferroelectrics are currently poorly understood. Here, we show that the frequency dispersion that is the hallmark of relaxor behavior is quantitatively related to the crystal che…
Barioperovskite, ideally BaTiO 3 , is a new member of the perovskite group. It is found as micro- to nano-crystals in a host of amorphous material contained within hollow, tubular inclusions in benitoite from the Benitoite Mine, San Benito County, California, U.S.A. The mean chemical composition determined by electron…
Lytic transglycosylases are enzymes that act on the peptidoglycan of bacterial cell walls. They cleave the glycosidic linkage between N-acetylmuramoyl and N-acetylglucosaminyl residues with the concomitant formation of a 1,6-anhydromuramoyl product. The x-ray structure of the lytic transglycosylase gp144 from the Pseu…
Abstract The influence of in situ modification of silica with bis‐(3‐(triethoxysilyl)‐propyl)‐tetrasulfide (TESPT) on filler network in silica filled solution SBR compound was investigated. In situ modification greatly increased the bound rubber content. TEM observation of silica gel showed that bridging and interlock…
Abstract In the present study, the morphology and mechanical properties of nylon‐6 nanofibers were investigated as a function of molecular weight (30,000, 50,000, and 63,000 g/mol) and electrospinning process conditions (solution concentration, voltage, tip‐to‐collector distance, and flow rate). Scanning electron micr…
Structural data on silicate, aluminate, and aluminosilicate melts are difficult to measure and understand at high temperature. X-ray absorption spectroscopy (XAS) performed in situ at high temperature has been used to probe the local environment of low-Z elements (Al, Si, and Ca). For fully tetrahedral network glasses…
Simple L-lysine derivatives, N(alpha)-hexanoyl-N(epsilon)-lauroyl-L-lysine (1), its alkali metal salts (2-4), and two-component compounds that consist of 1 with 2 to 4, were synthesized and their hydrogelation and organogelation properties were studied. Addition of hydrochloric acid to an aqueous solution of the alkal…
Ab initio (Car-Parrinello) molecular dynamics simulations were carried out to investigate the melt precursor of a modified phosphosilicate glass with bioactive properties, and to quench the melt to the vitreous state. The properties of the $3000\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ liquid were extensively compared wi…
The origin of sulfite (S 4+ ) species in silicate glasses was evaluated using XANES at the S K-edge. Systematic investigations show that the presence of S 4+ species in silicate glasses is an analytical artifact related to changes in the sulfur species caused by irradiation with an electron beam during EMPA or by irra…
The fluorescence of Mn2+ doped in the shell of CdS/ZnS core/shell nanocrystals at radially controlled position is used as a local probe of pressure in the nanocrystal shell. The redshift of the fluorescence with increasing shell thickness indicates a pressure of more than 4 GPa for 7.5 monolayers of ZnS. The radial de…
We divide glass and viscous liquid sciences into two major research areas, the first dealing with how to avoid crystals and so access the viscous liquid state, and the second dealing with how liquids behave when no crystals form. We review some current efforts to elucidate each area, looking at strategies for vitrific…
Mobile Metallionen: Halogenid-substituierte Lithiumargyrodite bilden eine neue Klasse von Li-reichen Festkörpern mit ungewöhnlich hoher Li-Beweglichkeit. Einkristall-Röntgenstudien (siehe Bild; schwarz Li, gelb S, rot I) bei Raumtemperatur und MAS-NMR-Messungen über einen breiten Temperaturbereich bieten spannende Ein…