Materials Literature
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Four different morphologies (taper microrods, nanotetrapods, fringy nanostructures and fasciculate nanostructures) of the CdSe semiconductor were synthesized via a template-free hydrothermal method, using low-cost inorganic compounds such as Cd(NO 3 ) 2 ·4H 2 O and NaSeO 3 as raw materials, and ethylenediaminetetraace…
In recent years there is an increasing interest in obtaining and investigating composite materials that comprise nanoparticles as fillers and polymers as matrix. Such composites may display combined features of both components, and sometimes even novel properties resulting from their mutual interactions. It is importa…
With the advance of new exploration and production technologies, oil and gas production has gone to deeper and tighter formation than ever before. These developments have also brought challenges in scale prediction and inhibition, such as how to prevent scales at high temperature (150–200°C), pressure (1,000–1,500 bar…
A novel pyrene-based highly pure blue fluorescent and stable molecule, 1,3,6,8-tetrakis[9,9-bis(3-methylbutyl)-9H-fluoren-2-yl]pyrene, was successfully synthesised via a Pd-catalysed Suzuki coupling reaction of 1,3,6,8-tetrabromo-pyrene with 2-[9,9-bis(3-methylbutyl)-9H-fluoren-2-yl]-4,4,5,5-tetramethyl[1,3,2]dioxabor…
We have studied the formation and modification of germanium nanoclusters in GeO x films under the action of pulse laser and isochronous furnace annealing. Pulse treatments were effected using either a Tisapphire laser operating at a wavelength of λ = 800 nm and a pulse duration τ of about 30 fs or a KrF excimer laser…
Solid solution formation is a common and effective way to reduce the lattice thermal conductivity for thermoelectric materials because of additional phonon scattering by point defects and grain boundaries. In the present work we prepared In2Te3–SnTe compounds using a mild solidification technique and evaluated their t…
Abstract Magnetic nanoparticles are known to generate heat when exposed to an alternating external magnetic field. A multi‐scale model for the heat generation by magnetic nanoparticles embedded in an elastomeric material has been developed. The model affords the determination of the unsteady‐state temperature profiles…
In this paper the effect of curing temperature on the morphology and properties of PAE based polyureas were evaluated using FTIR, AFM and electrochemical impedance spectroscopy (EIS). The PAE based polyureas were prepared from synthesized PAE chain extenders and hexamethylene diisocyanate（HDI）trimer/polytetramethylene…
The experimental prototype described in this research is a reciprocating active magnetic refrigerator with two permanent magnets and two active magnetic regenerators. Extensive tests have been carried out to measure the cooling performance of this prototype with nitrogen or helium as the heat transfer fluid. The proto…
Using Brenner's bond-order potential to represent the interaction of the in-plane C–C bond, an armchair (8,8) single-walled carbon nanotube is investigated by molecular dynamics simulation under axial loading and twist, both for perfect and imperfect lattices introducing an increasing number of Stone–Wales (SW) defect…
A special feature of Mg solidification is the anisotropy of the hexagonal closed packed lattice, which under directional growth conditions causes a strong crystallographic texture. Although this primary growth texture is in technical processes masked by subsequent solid state processes, its understanding can be helpfu…
A study of epitaxial growth of GaAs islands on (2×1) reconstructed SrTiO3(001) surface is presented. Under low arsenic partial pressures (PAs), GaAs islands are (001)-oriented, and increasing PAs leads to the progressive formation of (111)-oriented GaAs islands. This results from the competition between the formation…
This work investigated the microstructure and elevated-temperature (400-475oC) tensile and tensile-creep deformation behavior of a powder metallurgy (PM) rolled Ti-6Al-4V-1B(wt.%) alloy. The PM rolled Ti-6Al-4V-1B alloy exhibited a duplex microstructure, and it did not exhibit a strong α-phase texture compared with th…
A setup for studying dilatometric characteristics of metals and alloys in a 20 to 1350°C temperature range in vacuum or an inert gas medium is described. The built-in mass spectrometer is intended to monitor the composition and dynamics of gas release in the process of sample heating. Results obtained during sintering…
Relying on heat generated by plasma arc heating liquid water into steam as a swirl gas, a water plasma torch has the distinctive steam generation structure, which has various applications such as in the treatment of organic waste and hydrogen production for fuel cells in future vehicles. The operational features of th…
Geothermal water from geothermal plants often contains high levels of boron (B), above the Japanese effluent standard level. To establish an effective utilization system for geothermal resources, boron removal using non-calcined and calcined hydrotalcite was investigated using geothermal water from the Sumikawa geothe…
We propose a new concept, the centre of energy, to study energy diffusion and heat conduction in a one-dimensional hard-point model. For the diatom model, we find an anomalous energy diffusion as ( x 2 ) ∼ t β with β = 1.33, which is independent of initial condition and mass rate. The present model can be viewed as th…
The variation in magnetic properties of a Fe–1%Cu model alloy due to a cold rolling and a thermal aging has been evaluated to simulate the radiation damage of reactor pressure vessel of nuclear power plant. The thermal aging was conducted at 500 °C with different aging times in series. The hysteresis loops, magnetic B…
This paper reports that the high-quality Co-doped ZnO single crystalline films have been grown on a -plane sapphire substrates by using molecular-beam epitaxy. The as-grown films show high resistivity and non-ferromagnetism at room temperature, while they become more conductive and ferromagnetic after annealing in the…
Three marine araphid diatoms species, Grammatophora angulosa Ehrenberg, G. arcuata Ehrenberg and G. hamulifera Kiltzing, were examined in light (LM) and scanning electron microscopy (SEM), including sections treated by a Focused-Ion-Beam system. Observations of sequential changes of septa morphology with cell size red…