Materials Literature
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Abstract Phosphorus‐carbide, CP x (0.025 ≤ x ≤ 0.1), thin films have been synthesized by magnetron sputtering from pressed graphite–phosphorus targets. The films were characterized by X‐ray photoelectron spectroscopy, transmission electron microscopy and diffraction, and nanoindentation. CP 0.1 ex‐hibits C–P bonding i…
Thin films of V2O3 with thickness of 215nm were grown on a- and c-plane sapphire by pulsed laser deposition with (001)V2O3∥(001)Al2O3 and (110)V2O3∥(110)Al2O3 epitaxy. The effects of the growth direction on the electrical resistivity of the films were examined. Films on c-plane sapphire displayed a metal-to-insulator…
A phase-change magnetic material is synthesized by doping the known GeSbTe phase-change material with Fe, and its properties are compared with the parent chalcogenide material (see figure). Besides different optical (reflectivity) and electrical properties in the amorphous and crystalline states, its magnetic proper…
Cationic nanorods can be efficiently sequestered into cationic, neutral and anionic polyacrylamide microgels, with a loading capacity almost independent of the charge of the microgels. These results indicate that electrostatic forces do not dominate interactions between the nanorods and microgels.
Abstract The data from a previous study of the moisture adsorption of Corsican pine modified with linear chain carboxylic acid anhydrides (acetic, propionic, butyric, valeric, hexanoic) has been reanalysed so that moisture content is reported as a percentage of cell wall mass only. As part of this work, the change in…
A method for synthesizing superparamagnetic iron oxide (SPIO) multi-nanoparticle aggregates as molecular magnetic resonance imaging (MRI) contrast agents is described. The approach utilizes organic acid/base interactions in the colloid to induce highly controllable nanoparticle aggregation. Monodisperse aggregates wit…
Hierarchically organized vertical carbon nanotube arrays are produced by a hybrid approach combining plasma-enhanced chemical vapor deposition with self-assembled block copolymer nanotemplates. The selective deposition of Fe catalysts through a block copolymer nanotemplate yields ordered catalyst nanoparticles, as dep…
Pepsin from the stomach of albacore tuna, skipjack tuna, and tongol tuna was characterized. Pepsin from all tuna species showed maximal activity at pH 2.0 and 50 degrees C when hemoglobin was used as a substrate. Among the stomach extract of all species tested, that of albacore tuna showed the highest activity (40.55…
Competition for the cuprates: A new family of high-TC superconductors has been discovered. Iron pnictide oxides of the rare earth elements, such as LaFeAs(O1−xFx) (see crystal structure), are superconducting at temperatures up to 55 K and have critical magnetic fields up to 60 T. This result heralds a new era for supe…
The scaffolding of a π-conjugated oligomer, namely terthiophene, is achieved by taking advantage of the self-assembly of a guanosine derivative into highly directional H-bonded networks. Reversible interconversion allows switching between ribbons and quartet-based assemblies in solution. The self-assembly of 1 on surf…
Lack of plasticity is the main drawback for nearly all ultrafine-grained (UFG) materials, which restricts their practical applications. Bulk UFG Cu–Al alloys have been fabricated by using equal channel angular pressing technique. Its ductility was improved to exceed the criteria for structural utility while maintainin…
Periodontal tissue engineering is expected to overcome the limitations associated with the existing regenerative techniques for the treatment of periodontal defects involving alveolar bone, cementum, and periodontal ligament. Cell-based tissue engineering approaches involve the utilization of in vitro expanded cells w…
Abstract The ability to alter collagen organization could lead to more physiologically relevant scaffolds for tissue engineering. This study examined collagen organization in the presence of polysaccharide and the resulting effects on viscoelastic properties. Fibrillogenesis in the presence of chondroitin sulfate (CS)…
Metallic nanowires have many attractive properties such as ultra-high yield strength and large tensile elongation. However, recent experiments show that metallic nanowires often contain grain boundaries, which are expected to significantly affect mechanical properties. By using molecular dynamics simulations, here, we…
Difluoroboron dibenzoylmethane-poly(lactic acid) emission is sensitive to the polarity of the surrounding medium. As the polymer molecular weight increases, fluorescence maxima blue-shift for these dye-polymer conjugates. A similar shift is noted in their delayed emission spectra. This “green to blue” color change may…
EuS and Ag2S colloidal semiconductor nanocrystals are observed to display optical properties characteristic of the corresponding bulk materials, yet have the desirable processing properties of colloidal nanocrystals. We envision that bulk nanoparticles will play a complementary role to quantum-confined structures as a…
De novo designed amphiphilic and acidic β-sheet peptides in the form of monolayers and fibril assemblies are used as templates for monitoring calcium phosphate nucleation. The regular arrangement of negatively charged aspartic acid residues in a solution supersaturated with respect to apatite induces the nucleation of…
Using first-principles density functional calculations, we have computed the optical and magneto-optical properties of the Cr-based double perovskite compounds, Sr2CrB′O6 with B′=W,Re,Os. Our computed magneto-optic spectra show substantially large Kerr rotations of about −2° to −2.5° for Sr2CrWO6 and Sr2CrReO6 and a m…
The temperature dependence of the electrical properties of β-Ga2O3 is analyzed from liquid helium to room temperature by Hall measurements. Below 100K, the carrier motion takes place within the impurity conduction band and it shows a power-law dependence. An electrostructural coupling is ascertained. Thermal activatio…
An approach of enhanced light-trapping in a thin-film silicon solar cell by adding a two-filling-factor asymmetric binary grating on it is proposed for the wavelength of near-infrared. Such a grating-on-thin-film structure forms a guided-mode resonance notch filter to couple energy diffracted from an incident wave to…