Materials Literature
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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…
Electron-beam induced recrystallization of irradiation-induced amorphous Sr2Nd8(SiO4)6O2 is investigated in situ using transmission electron microscopy with 200keV electrons at room temperature. Epitaxial recrystallization is observed from both the amorphous/crystalline interface and the surface, and the recrystalliza…
The kinetics of crystallization from the melt is investigated for hcp Mg employing molecular dynamics simulations based on a recently developed embedded-atom-method interatomic potential. The interface mobility $(\ensuremath{\mu})$, defined as the constant of proportionality between interface velocity and undercooling…
Molecular-dynamics (MD) simulations have revealed that under shock loading a nanovoid in copper grows to be of ellipsoidal shape and different loading directions ([100] and $[1\overline{1}1]$) change the orientation of its major axis. This anisotropic growth is caused by preferential shear dislocation loop emission fr…
The authors report on the thermal activation of phosphorus doped p-type ZnO thin films grown by radio frequency magnetron sputtering. The p-type ZnO was produced by activating phosphorus doped ZnO thin films in N2, Ar, or O2 ambients. The hole concentration of the p-type ZnO, prepared in an O2 ambient, showed a lower…
Abstract In this work, the melting behaviors of nonisothermally and isothermally melt‐crystallized poly( L ‐lactic acid) (PLLA) from the melt were investigated with differential scanning calorimetry (DSC) and temperature‐modulated differential scanning calorimetry (TMDSC). The isothermal melt crystallizations of PLLA…
Abstract Searching new shape memory polymer and the associating synthesis technology are critical on the development of smart materials. In this paper, a comprehensive study on Poly(hexylene adipate) PHA being the soft segment of shape memory polyurethane (SMPU) was presented. Bulk polymerization method was employed t…