Materials Literature
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Using the first-principles layer-multiple-scattering method we developed in previous work, we analyze recent experimental data on the extinction of light by rectangular two-dimensional arrays of gold nanoparticles on a dielectric waveguide. The theoretical results reproduce accurately the measured spectra and provide…
Different stacking arrangements of ${\mathrm{BC}}_{3}$ layered crystals are studied with the use of the ab initio pseudopotential density-functional method. The total energies, lattice constants, electron energy band structures and density of states, as well as phonon frequencies are calculated for the possible bulk $…
Magnetic MnZn-ferrite nanoparticles with a narrow size distribution were prepared in water–CTAB–hexanol microemulsions. The region of microemulsion stability in the system was determined, using the titration method, as a function of the temperature and of the type and concentration of solutes in the aqueous phase. The…
We present an overview of currently available EUV multilayer coatings that can be used for the construction of solar physics instrumentation utilizing normal-incidence optics. We describe the performance of a variety of Si-based multilayers, including Si/B<sub>4</sub>C and new Si/SiC films that provide improved perfor…
The metal-insulator transition and magnetic collapse of NiO under high pressures have been studied with the hybrid density functional (HDF) and the general-gradient approximation (GGA). Our results show that even in the intermediate coupling regime GGA does not take the correlation effects into account appropriately.…
Hydrogen-related degradation of the mechanical properties of a Ni-Ti superelastic alloy has been examined by means of delayed fracture tests in acidic and neutral fluoride solutions and hydrogen thermal desorption analysis. Delayed fracture took place in both solutions; the time to fracture was shorter in the acidic s…
In their Report “Micellar nanocontainers distribute to defined cytoplasmic organelles” (25 April, p. [615][1]), R. Savic et al. studied the intracellular distribution of endocytosed poly(caprolactone)23-poly(ethylene oxide)45 (PCL-PEO) micelles in PC12 cells where tetramethylrhodamine-5-
We have performed pseudopotential calculations and x-ray-diffraction and x-ray-absorption measurements on the ${\mathrm{CuGaO}}_{2}$ delafossite under high pressure. We have completely characterized the structural behavior of the low pressure phase. We have found out that the a axis is more compressible than the c axi…
The optical diffraction limit is rigidly determined as a simple equation of wavelength λ and lens numerical aperture NA ( ): λ/2/NA. In this paper, we report that Ag 5.8 In 4.4 Sb 61.0 Te 28.8 and Ge 2 Sb 2 Te 5 chalcogenide thin films, which are typical of optical recording materials used in digital versatile discs (…
We investigate the structure and thermal behaviour of boron nitride (BN) nanotubes using molecular-dynamics simulations based on the Tersoff-like potential. The strain energy decreases with increasing diameter, which is proportional to the inverse square of the tube diameter on the basis of continuum elastic theory. T…
We describe the syntheses, the 1H NMR studies in CD3OD and D2O as solvent, the X-ray characterization, and the luminescence properties in D2O solution of the two complexes Eu.1 and Er.1, where 1 is a dipartite ligand that includes (i) a 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (DO3A) unit serving as hosting…
Anisotropic particles suspended in a nematic liquid crystal disturb the alignment of the liquid crystal molecules and experience small forces that depend on the particles' orientation. We have measured these forces using magnetic nanowires. The torque on a wire and its orientation-dependent repulsion from a flat surfa…
The magnetic properties of ${\mathrm{Co}}^{2+}$ ions in epitaxial (Zn,Co)O layers with 10% Co concentration have been studied by electron paramagnetic resonance spectroscopy. The Co-related EPR spectrum is characterized by a 200-G broad anisotropic single line with g factors close to those of the isolated ${\mathrm{Co…
Two composite compounds, [{Ce(DMF) 4 (H 2 O) 3 }{Ce(DMF) 4 (H 2 O) 4 }(P 2 W 18 O 62 )]·H 2 O ( 1 ) (DMF = N, N -dimethylformamide) and [{La(DMF) 6 (H 2 O)}{La(DMF) 4.5 (H 2 O) 2.5 }·(P 2 W 18 O 62 )] ( 2 ), have been constructed at room temperature and characterized by single crystal X-ray structural analyses, ESR sp…
Starburst triarylamines 2 and 3 were electropolymerized to form electrochromic thin films. Film from 2 showed intense absorption at 372 nm before voltage was applied. There were two absorption bands at 496 nm and 1000−2000 nm at 0.3 V, and a broad band, which peaked at 807 nm at 0.6 V. Film from 3 showed intense absor…
We tested whether internal transcribed spacer (ITS) rDNA sequence differences are correlated with sexual compatibility in the Sellaphora pupula complex, a model system for investigations of the species concept and speciation in diatoms. The phylogenetic relationships among the demes and the systematic position of the…
We have measured carbon nanotube quantum dots with multiple electrostatic gates and used the resulting enhanced control to investigate a nanotube double quantum dot. Transport measurements reveal honeycomb charge stability diagrams as a function of two nearly independent gate voltages. The device can be tuned from wea…
Transport properties of magnetic multilayers in current perpendicular to the plane of the layers geometry are defined by diffusive scattering in the bulk of the layers, and diffusive and ballistic scattering across the interfaces. Due to the short screening length in metals, layer by layer treatment of the multilayers…
Electronic properties of proposed new families of carbon single walled nanotubes are investigated. These nanotubes, called graphynes, result from the elongation of covalent interconnections of graphite-based nanotubes by the introduction of yne groups. Analogous to ordinary nanotubes, armchair, zigzag and chiral graph…
The results of dc magnetization, heat capacity, electrical resistivity (rho) and magnetoresistance measurements are reported in detail for the compounds, RCuAs2 for R= Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er, crystallizing in HfCuSi2-type tetragonal structure, with the aim of bringing out anomalies among 'normal' (that is,…