Materials Literature
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A lyotropic liquid-crystal-templated superlattice of inorganic CdSe semiconductor nanostructures within an organic semiconductor polymer-network film was fabricated by a self-assembly process. The film is characterized with small-angle x-ray diffraction experiments and ultraviolet-visible absorption measurements. Empi…
Recently reported [C. Filipi\ifmmode \check{c}\else \v{c}\fi{} and A. Levstik, Phys. Rev. B 73, 092104 (2006)] and reinforced [J. F. Scott et al., J. Phys.: Condens. Matter 18, L205 (2006)] critical exponents $\ensuremath{\gamma}=1.0$ and $\ensuremath{\beta}=0.5$ of the isotope-substituted ferroelectric $\mathrm{Sr}\m…
An unusual phase has recently been observed in the organic material $(\mathrm{TMTSF}{)}_{2}{\mathrm{PF}}_{6}$, where superconductivity (SC) may coexist with spin-density wave (SDW) in the whole pressure interval ${p}_{c1}<p<{p}_{c}$ below the first order transition into SC or normal metal phase. Assuming that th…
Self-assembled In1−xMnxAs quantum dots (0.19⩽x⩽0.45) have been grown on GaAs (100) substrates by low-temperature molecular beam epitaxy. The microstructure analysis revealed that the uniformly distributed In1−xMnxAs dots have a zinc blende structure as x⩽0.38. Furthermore, all samples exhibit ferromagnetic state at 5K…
An in situ method, called synchrotron x-ray microdiffraction, was introduced to examine the electric-field-induced structural modulation of the epitaxially grown pseudotetragonal BiFeO3 thin film. To evaluate the d spacing (d001) from the measured intensity contour in the 2θ-χ space, the peak position in each diffract…
Adiabatic shear banding (ASB) is a dynamic failure mode characterized by large plastic strains in a narrow localized band. ASB occurs at high strain rates (ε̇⩾103s−1), under adiabatic conditions leading to a significant temperature rise inside the band [H. Tresca, Annales du Conservatoire des Arts et Métiers 4, (1879)…
Light emission from single colloidal CdSe∕ZnS (core/shell) nanocrystals embedded in electrically driven organic light emitting devices is demonstrated at room temperature. Spectral diffusion and blinking from individual quantum dots were observed both in electro- and photoluminescence. The authors propose a model in w…
Abstract The synthesis and characterization of the μ‐Cl‐bridged dinuclear complex [CuLCl] 2 with the new Schiff‐base ligand HL, 2‐methyl‐6‐[(pyridine‐2‐ylmethylene)amino]phenol, is reported. The structural study shows the complex has the unusual distorted trigonal‐bipyramidal geometry. Variable temperature susceptibil…
Abstract Heteroarm H‐shaped terpolymers, [(poly( L ‐lactide))(polystyrene)]poly(ethylene oxide)[(polystyrene)(poly( L ‐lactide))], [(PLLA)(PS)]PEO[(PS)(PLLA)], in which PEO acts as a main chain and PS and PLLA as side arms, have been successfully prepared via combination of reversible addition–fragmentation transfer (…
The authors fabricated a single quantum dot in a single-walled carbon nanotube (SWCNT) channel using focused-ion-beam techniques. They used this technique to form two tunnel barriers, constituting a single quantum dot, by introducing two damaged regions with a separation of 50nm into a SWCNT channel. Electrical proper…
The pattern equations method is extended to solving three-dimensional problems of wave diffraction by an ensemble of bodies. The method is based on the reduction of the initial problem to a system of N ( N is the number of scatterers in the ensemble) integro-operator equations of the second kind for the scattering pat…
Tungsten carbide-diamond like carbon (WC-DLC) multilayer coatings have been prepared by sputter deposition from a tungsten-carbide target and periodic switching on and off of the reactive acetylene gas flow. The stress in the resulting WC-DLC multilayers has been studied by substrate curvature. Periodicity and microst…
First-principles calculations have been conducted to investigate the magnetic properties of $3d$ and $4d$ transitional-metal (TM) atoms doped in hydrogen-passivated silicon quantum dots. The TM impurities exhibit almost identical magnetic behavior in the quantum dots of different sizes. The magnetic moments for most $…
A low-pressure detection technology utilizing the field emission of carbon nanotubes (CNTs) is introduced and its performance is characterized. To overcome the limitations of conventional ionization gauges, the CNTs had been proposed as an electron source. However, the simple triode structure of previous CNT pressure…
In situ potassium (K)-doped single-walled carbon nanotube (SWCNT) was synthesized using a hydrogen arc-discharge method. X-ray photoelectron spectroscopy analysis showed that the K-doped SWCNTs consisted of 0.12% K mass composition. The K-doped SWCNTs showed the lower turn-on electric field of 2.0V∕μm at a current den…
Europium(III)-containing zinc oxide thin films (1, 5, 8, and 10at.%) were prepared from Pechini’s solution and used as active layers in thin-film electroluminescent devices. By applying a low bias steady state voltage (10–50V) it was possible to observe electroluminescence of the device. By increasing the rate Eu3+∕Zn…
Changes in the electrical resistance of nitrogen incorporated Ge2Sb2Te5 (NGST) films were investigated as a function of nitrogen content by four-point probe and ac two-point probe methods. Some nitrogen is initially located inside the cubic structure, resulting in a significant increase in crystalline temperature and…
The electronic structure and the thermoelectric tensor are calculated for the 312 MAX phases ${\mathrm{Ti}}_{3}\mathrm{Si}{\mathrm{C}}_{2}$, ${\mathrm{Ti}}_{3}\mathrm{Ge}{\mathrm{C}}_{2}$, and ${\mathrm{Ti}}_{3}\mathrm{Al}{\mathrm{C}}_{2}$. The thermoelectric tensor is shown to be anisotropic in all cases. However, fo…
A defect whose electron transmission probability can be controlled by electric field is intentionally created on a metallic single-walled carbon nanotube (SWCNT) with a voltage pulse from a tip of an atomic force microscope (AFM). Localized characteristics of the created defect are elucidated with local electrical pro…
Abstract A nanoporous additives, polyhedral oilgomeric silisesquioxane containing eight functional hexafluorine groups, octakis(dimethylsiloxyhexafluoropropyl ether)silsesquioxane (OF) has been synthesized and blended with the UV‐cured epoxy resin. The OF containing (10%) epoxy has significantly lower dielectric const…