Materials Literature
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Dynamics is studied of an electron in a quasi-one-dimensional ballistic ring under circularly polarized electromagnetic field propagating along the normal to the ring plane. The average emission intensity from the ring is calculated. The value and direction of the electron average angular velocity in the ring depend o…
Fe2O3 nanoparticles of different sizes ranging from 22 to 56nm were synthesized chemically by a modified sol-gel method. Pure alpha phase particles as well as particles with admixture of alpha and gamma phase were obtained and identified by x-ray and Mössbauer measurements. Different size and phase controlling paramet…
We theoretically study the trapping time distribution and the efficiency of the excitation energy transport in dendritic systems. Trapping of excitations, created at the periphery of the dendrimer, on a trap located at its core, is used as a probe of the efficiency of the energy transport across the dendrimer. The tra…
Nanomechanical properties of single-walled carbon nanotube (SWNT) reinforced epoxy composites with varying weight percentage (0, 1, 3, and 5 wt%) of nanotubes were measured by nanoindentation and nanoscratch techniques. Hardness and elastic modulus were measured using a nanoindenter. Scratch resistance and scratch dam…
Abstract An always increasing knowledge on material properties as well as a progressively more sophisticated production technology make shape memory alloys (SMA) extremely interesting for the industrial world. At the same time, SMA devices are typically characterized by complex multi‐axial stress states as well as non…
Published observations, mainly on phytoplankton, suggest that (N 2 -fixing) cyanobacteria can outgrow diatoms under nitrate limitation. This study focussed on the competition for limiting nitrogen between 3 diatom species and 2 cyanobacteria species in biofilms. The potential of the diatom species Nitzschia perminuta…
The sudden change of the velocity, so-called "kink," of the dispersing peak in angle resolved photoelectron spectroscopy is a well-known feature in the high temperature superconducting cuprates. Currently, the origin of the kink is being much debated, but a consensus has not emerged yet. Here, we present a study of th…
Photoexcited TiO2 degrades biomolecules such as nucleic acids, cell membrane proteins, and enzymes. Stabilization of enzyme activity against the deactivation caused by the combination of TiO2-UV is essential if we are to develop novel hybrid materials exhibiting photocatalytic and biocatalytic activities useful for de…
Solution-grown lamellar single crystals of poly(11-undecalactone) (PUDL) have been prepared in 1-hexanol. The lozenge and hexagonal-shaped single crystals were grown simultaneously, and these crystals gave well-resolved electron diffraction diagrams from which the orthogonal reciprocal lattice with the parameters a* =…
Numerous previous studies have established that the addition of a microphase-ordered AB diblock copolymer to a thin homopolymer A (hA) film can slow, if not altogether prevent, film rupture and subsequent film dewetting on a hard substrate such as silica. However, only a few reports have examined comparable phenomena…
In this work, we review the electrical and optical properties of InO x and ZnO films, and their use as dynamic optical materials. The transport properties of these films are analysed and correlated with the growth parameters. We have studied the permanent light-induced refractive index changes in our dc-sputtered InO…
Assuming that cross-slip by thermally activated migration of jogs can cause annihilation of screw dislocation dipoles without macroscopic crystallographic confinement of cross-slip to the cross-slip plane, an attempt is made to re-derive earlier equations for the saturation stress and the plastic strain amplitude in p…
We investigated the liquid−liquid phase separation behavior of polycarbonate (PC)/carbon dioxide (CO 2 ) systems by high fidelity digital microscope and light scattering apparatus equipped with a high-pressure visualized cell. When the PC/CO 2 system was annealed at a temperature above 200 °C, the spherical domain gre…
The water-insoluble title compound, catena-poly[palladium(II)-di-mu-acetato-kappa4O:O'], [Pd(C2H3O2)2]n, was obtained from a nitratopalladium solution and acetic acid as a pale-pink powder. Ab initio crystal structure determination was carried out using X-ray powder diffraction techniques. Patterson and Fourier synthe…
The co-deformation of Cu–Ag or Cu–Nb composite wires used for high-field magnets has a number of important microstructural consequences, including the production of very-fine-scale structures, the development of very high internal surface-area-to-volume ratios during the drawing, and the storage of defects at interpha…
Cylindrical brush molecules adsorbed on a surface change their contour length and then switch conformation from rodlike to globular upon decrease of the surface energy of the substrate. The conformational changes result from partial desorption of poly( n -butyl acrylate) side chains as the surface pressure drops from…
We report here the first electrochemical oxidation−reduction cycle procedure to roughen gold substrates in 0.1 N HCl aqueous solution containing 1 mM rutile TiO 2 nanoparticles under the irradiation of UV light. It is encouraging to find that the oxidized peak in the anodic scan, which is responsible for the surface-e…
A new category of gels where gelification and breaking of the gels are chemically induced is presented. In particular, the latent gellant polyallylamine produced stable gels with some organic solvents after reaction with CO2 at room temperature, giving the gellant polyallylammonium carbamate. The rheological behavior…
This paper reviews the impact of scaling on the system performance of mechanical inertia sensors. Permanent cost pressure will result in continuous efforts to integrate more functions into further miniaturized systems. As a consequence microsystems (MEMS) will also incorporate functional nano devices such as carbon na…
In-situ near-infrared (NIR) spectroscopy was used to simultaneously measure the sorption of high-pressure CO 2 and the swelling of poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG). NIR spectroscopy in transmission mode allowed us to measure the sorption of CO 2 using its combination bands and follow the sw…