Materials Literature
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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…
Photoluminescence (PL) and Raman spectroscopies of CdSe∕ZnS core/shell quantum dots (QDs) were studied under hydrostatic pressure (0–160kbars) at room temperature. Two phase transitions, at 69 and 79kbars, respectively, were observed, which correspond to wurtzite-rocksalt and rocksalt-cinnabar structural transformatio…
Electric switching and memory effects were observed on devices composed of a RbAg4I5 film sandwiched between Ag and Pt electrodes. The RbAg4I5 films were prepared by pulsed laser deposition and the lateral size of devices was scaled down to 300nm by focused ion beam lithography. The device can be switched between high…
Molecular dynamics simulations of the interaction between a screw dislocation and a coherent bcc Cu precipitate in bcc Fe indicate that the screw dislocation stress field assists a martensitic transformation into a close-packed structure for precipitate diameters larger than 1.8nm, resulting in a stronger obstacle to…
Epitaxial Ba0.15Zr0.85TiO3 (BZT) ferroelectric thin films with (001), (011), and (111) orientations were, respectively, grown on La0.67Sr0.33MnO3 (LSMO) buffered LaAlO3 substrates by pulsed laser deposition method. The dc electric-field dependence of permittivity and dielectric loss of (001)-, (011)-, and (111)-orient…
The main purpose of this paper is to investigate the local deformation arising in NiTi plate subjected to stress concentration during tensile loading. First, a test system is constructed on the basis of digital image correlation (DIC) in order to measure the local strain distribution over the surface of the specimen.…
The thermoelectric material ${\mathrm{CoSb}}_{3}$, with skutterudite structure, was subjected to high pressures using a diamond anvil cell up to $40\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. Above $20\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ this compound undergoes an irreversible isosymmetric transition to a phase that…
Abstract Polymeric materials from renewable resources have been tested as additives for rubber blends and vulcanisates. Their influence on the vulcanisation process, tensile strength properties and dynamical‐mechanical properties has been studied and compared with silica . The corn starch, collagen hydrolysate, corn p…
Abstract The new square‐planar Ni II –N 2 O 2 complex [Ni( Me L)] ( 1 Me ), where Me L stands for the dianionic phenolato form of N , N′ ‐bis(3,5‐di‐ tert ‐butyl‐salicylidene)‐4,5‐dimethyl‐1,2‐phenylenediamine ( Me LH 2 ), has been synthesised and fully characterised. X‐ray crystallography was also used for the charac…
The phase change material Ge2Sb2Te5 is widely investigated for use in nonvolatile memories. It has been reported that the crystallization speed depends on the thermal history, indicating that structural differences exist between amorphous states. The authors apply fluctuation electron microscopy to quantify difference…