Materials Literature
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Transition-metal hydrogen maleates of composition M(C 4 H 3 O 4 ) 2 · 4H 2 O, where M = Mn, Fe, Co, and Ni, and their solid solutions were synthesized and characterized by X-ray crystallography, IR spectroscopy, mass spectrometry, and thermal analysis. X-ray crystallography and IR spectroscopy showed that both intramo…
Two ferroelectric three‐ring chiral esters, one with a partially fluorinated alkyl chain and another with a cyano terminal group, were mixed with a structurally similar compound having an alkyl terminal chain. In their mixtures an antiferroelectric phase was induced. The phase behaviour, spontaneous polarisation, tilt…
Porous glass beads with a core‐shell structure have been successfully prepared through subcritical water treatment. The product has high capacity and fast mass transfer property due to its structure, and may serve as an inorganic adsorbent. Accordingly, the kinetics, the equilibrium isotherm, and the column breakthrou…
We simulate hot optical phonon decay in small diameter (<0.7 nm) carbon nanotubes, solving the phonon Boltzmann transport equation using Monte Carlo methods incorporating the full phonon spectrum and phonon-phonon scattering. Results indicate decay times inversely proportional to the lattice temperature with ne…
The increase in depolarization temperature induced by the poling of (Li x Na 1- x )NbO 3 ceramics having an Li concentration of x = 0.08 (LNN8) was studied. Initially, the Curie temperature T C was measured to be approximately 300 °C, and it increased after the application of poling at high electric fields; this incre…
Molecular dynamics simulations are used to characterize ferroelectricity on the (001) surfaces of PbTiO 3 (PT), one of the most widely studied ferroelectric materials. Two different empirical interatomic shell model potentials are used. Both PbO and TiO 2 surface terminations in PT under open circuit electrical bounda…
We report the amorphization induced high magneto-caloric effect (MCE) of recently developed Gd 55 Al 15 Ni 30 bulk metallic glass (BMG). The magnetic properties of the Gd 55 Al 15 Ni 30 BMG are investigated in comparison with that of its crystalline counterpart. It is found that amorphization can increase the saturati…
Cathodoluminescent and electrical properties of an individual ZnO nanowire with oxygen vacancies, He Xiao-Bo, Yang Tian-Zhong, Cai Jin-Ming, Zhang Chen-Dong, Guo Hai-Ming, Shi Dong-Xia, Shen Cheng-Min, Gao Hong-Jun
The resistance of austenitic stainless steel to intergranular corrosion (IGC) varies during the process of aging at temperatures between 500 and 700°C. This follows the well-known phenomena of precipitating of M 23 C 6 chromium carbides and intermetallic phases (η, σ, χ). Consequently, this leads to significant Cr-dep…
First principles total energy calculations were carried out to investigate structural and electronic properties of zinc blende-type AlN, BN and BxAl 1−x N solid solutions. We have calculated the lattice parameters, bulk modulus, pressure derivative, and BxAl 1−x N band-gap energy for zinc blende-type crystals of the c…
Adsorbed natural gas has various advantages and is relatively more economical than liquefaction and compression. Carbon nanotubes can be introduced as a new candidate for natural gas storage. In this study, adsorption of methane was firstly studied on the as-prepared multi-walled carbon nanotubes, and then chemical an…
The quick equalization technology of ultra-capacitor stacks in series can protect ultra-capacitors and make full use of limited capacitance. Ultra-capacitorpsilas high specific power and charging current require a higher equalization speed. Therefore a method related with buck-boost conversion for switched capacitorsp…
Molecular chirality plays an important role in the science of liquid crystals, leading to cholesteric liquid crystal, blue phases, ferroelectric and antiferroelectric smectic phases and twist grain boundary phases. In all of these mesogens, chirality is an intrinsic property built into the chemical structure of mesoge…
We present a first-principles study of the criteria governing the electronic and structural stability of epitaxial, half-metallic ferromagnetic materials with zinc-blende structure. Upon their application to vanadium pnictides and chalcogenides, we find that the criteria for structural stability are crucial when the o…
The article maintains that the new 7th EURATOM Framework CARBOWASTE project will develop an integrated approach to waste management, through investigation of the nature of graphite and other carbonaceous wastes, potential treatment options, the potential for recycling/re-use and disposal behaviour. When complete, the…
The mechanisms of modified layer formation and the effect of surface condition on the roughness formation of 193nm photoresist (PR) materials during short time fluorocarbon plasma exposures were investigated. The authors employed a shutter approach to minimize the plasma transient effects on processing of PR surfaces.…
This study aims to investigate the storage response of an activated sludge system in the presence of two different substrates which are stored as two different polymers. The objective of the study was to determine the changes in the response of an activated sludge system when two different storage mechanisms could occ…
The effects of annealing on the material characteristics of a diamond-like carbon (DLC) thin film fabricated by focused-ion-beam chemical vapor deposition (FIB-CVD) were investigated. The elementary analysis, using Rutherford backscattering spectrometry and elastic recoil detection analysis, and measurement of hardnes…
This paper discusses the principles and theoretical foundations of the construction of various types of adaptive lenses based on liquid crystals. It is shown how they have evolved from lenses that operate in polarized light with long focusing times to lenses that operate in unpolarized light with increased aperture an…
The NiWO4 powders have been synthesised by reaction between NiCl2 and Na2WO4 aqueous solutions and following calcinations at different temperatures. XRD and SEM analyses were used to characterise the powders. Single phase NiWO4 powders were formed above calcining temperature of 600°C. XRD analysis indicated that the N…