Materials Literature
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Abstract Deep level transient spectroscopies (DLTS) applied to Schottky junctions made on homoepitaxial boron‐doped diamond films show the existence of two traps. A deep acceptor, negatively charged and strongly attractive for holes, 1.57 eV above the valence band edge displays the characteristic features of a complex…
Single crystals of a new semi-organic nonlinear optical material glycine hydrobromide were grown from solution by slow evaporation at room temperature. Good optical quality single crystals with dimensions 17×8×5 mm 3 were obtained. The grown crystal had been confirmed by single-crystal X-ray diffraction and the vibrat…
Abstract Polycrystalline CVD diamond has been annealed in vacuum at temperatures t an = 1550 °C–1690 °C to investigate an influence of modifications of grain boundaries (GB) and defects on thermal conductivity and optical properties of originally optical quality material. While the sample was converted by this heat tr…
Electrochromic thin films of molybdenum oxide (MoO 3 ) were prepared on transparent conducting oxide substrates, i.e. fluorine doped tin oxide coated (FTO or SnO 2 :F) glass substrates by electron beam evaporation technique using pure MoO 3 (99.99%) pellets at various substrate temperatures (i.e. T sub =room temperatu…
This paper presents a relatively simple method to fabricate field-emitter arrays from silicon substrates. These devices are obtained from silicon micromachining by means of the HI-PS technique - a combination of hydrogen ion implantation and porous silicon used as sacrificial layer. Also, a new process sequence is pro…
The interaction between poly(ethylene oxide) (PEO) chains grafted onto polystyrene latex particles and alpha-, beta-, and gamma-cyclodextrins (CD) was studied by small-angle neutron scattering. The particles were contrast-matched to the solvent in order that only the scattering from the polymer layers was detected. Th…
Anode‐supported cone‐shaped tubular solid oxide fuel cells (SOFCs) are successfully fabricated by a single‐step cosintering process. The cone‐shaped tubular single cell, NiO+YSZ/YSZ/LSM+YSZ/LSM, is comprised of a Ni+yttria‐stabilized zirconia (YSZ) anode, YSZ electrolyte, a La 0.7 Sr 0.3 MnO 3 (LSM)+YSZ cathode layer,…
Abstract The remarkable physical properties of diamond such as tissue equivalence (atomic number Z = 6, close to that of human tissue), radiation and mechanical hardness and a wide band gap (5.5 eV) make it an ideal material for the fabrication of detectors for radiotherapy applications. However, the response to the r…
The mechanical behaviour of extruded AZ31B magnesium alloy with two different textures was studied. Acoustic emission (AE) was used to record the signals to detect the various deformation processes occurring during the mechanical test. Hierarchical clustering and Kohonen's self-organising neural network map were used…
Abstract The grafting of a vinyl monomer, methyl methacrylate (MMA) or styrene (ST), onto a natural rubber (NR) exhibited a core–shell structure, with NR as the core and poly(methyl methacrylate) or polystyrene as the shell. The grafting efficiency (GE) of the graft copolymer was determined by a solvent‐extraction tec…
Aqueous gelcasting for 0.94Bi 0.5 Na 0.5 TiO 3 –0.06BaTiO 3 (BNBT6) lead‐free piezoceramics was investigated in this paper. A stable BNBT6 suspension with 50 vol% of solid loading and <1Pa·s of viscosity was successfully prepared when 0.5 wt% of PMAA‐NH 4 was added with the pH value controlled in the range 8–10. De…
Abstract Applications requiring the containment and transportation of hydrogen gas at pressures greater than 70MPa are anticipated in the evolving hydrogen economy infrastructure. Since hydrogen is known to alter the mechanical properties of materials, data are needed to guide the selection of materials for structural…
Abstract The electrical properties of (001) n‐type diamond were characterized by measuring the current voltage and capacitance voltage at different temperatures. Clear n‐type rectification characteristics were confirmed from Ti/n‐type diamond Schottky diodes. From the capacitance properties, the net donor density and…
A new controllable homogeneous precipitation approach has been developed to synthesize zinc-substituted nickel hydroxide nanostructures with different Zn contents from a zinc nanostructured reactant. As typical layered double hydroxides (LDHs), zinc-substituted nickel hydroxide nanostructures can be formulated as NiZn…
Water-soluble ZnO nanoparticles coated with polyethylene glycol biscarboxymethyl (PEG(COOH) 2 ) were prepared in ethanol/water solutions. The ZnO nanoparticles have a hexagonal structure with an average size of 10 nm. Three different luminescence bands are observed from the nanoparticle solutions: green emission at 53…
Phosphorusinsitudoped (Si1-yCy) films (SiC:P) with substitutional carbon concentration of 1.7% and 2.1% were selectively grown in the source and drain regions of double-gate -oriented (110)-sidewall FinFETs to induce tensile strain in the silicon channel.Insitudoping removes the need for a high-temperature spike annea…
A review of simulation studies of phase equilibria and free energies for systems dominated by coulombic interactions is presented. Phase transitions occur for ionic systems in the strong-coupling limit realized in low-dielectric constant solvents, at low temperatures, or for high charge valences. The majority of simul…
The dynamics of methanol and ethanol molecules confined in MCM-41 with pore diameters d = 2.1, 2.8, and 3.7 nm has been investigated by quasi-elastic neutron scattering (QENS) and dielectric measurements. Two kinds of adsorbed amounts of liquids were studied: surface-adsorbed and capillary-condensed. The QENS measurem…
This letter presents a side-hole fiber-based extrinsic Fabry–PÉrot interferometric (EFPI) sensor whose cavity was filled with sulfur hexafluoride (SF$_{6}$) forin situpower transformer partial discharge detection. The Fabry–PÉrot cavity was formed by a polished thin diaphragm and a cleaved side-hole fiber that were th…
We report two types of site-selective metal deposition methods based on colloidal crystal templating. We discuss in particular the controllability of the morphology and crystallinity of Au nanodots depending of the choice of method.