Materials Literature
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To meet the emerging near-term and long-term packaging challenges, the electronics industry must begin to increase spending on packaging research and technology development. In the short-term the industry shift to manufacturing outsourcing (combined with decreased profitability in many electronics sectors) has driven…
The adsorption and covalent coupling of bovine serum albumin (BSA) onto methylmethacrylate (MMA) based monodisperse latex particles with different hydrophylic surfaces were investigated. P(MMA) and P(MMA/HEMA) microbeads in the size range of 1.5–2.0 mm were prepared by a dispersion homopolymerization method in the pre…
The quasi‐crystals of hexadecyltrimethylammonium (CTA + )‐montmorillonite formed in suspension were investigated by small‐angle x‐ray scattering (SAXS). The d ‐spacing of the quasi‐crystals increased from 17.1 to 21.7 Å, corresponding to an increasing surfactant loading from 20 to 250% of the clay's cation exchange ca…
The luminescent properties of cerium doped calcium sulphate are studied: fluorescence and excitation spectra, optical absorption and thermoluminescence (TSL). It is known that, in rare earth doped CaSO4, only cerium induces a strong 400 degrees C TSL peak. In CaSO4:0.2%Ce samples synthesised under oxidising conditions…
In 1969, a seminal section on reduced forms and conventional cells was published in the International Tables for X-Ray Crystallography. The section contains a table that gives a metric classification of the 44 reduced forms. In 2001, this table with appropriate revisions was republished in the Journal of Research of t…
Polypropylene (PP) fibers have been increasingly used in the technical textile industry for a variety of applications. Wetting behavior of PP fibers is of importance in these applications. The wetting behavior of the untreated and oxygen plasma treated polypropylene fibers was studied by the environmental scanning ele…
In this study, layered silicate/aliphatic polyester nanohybrids were synthesized by ring-opening polymerization of ϵ-caprolactone as promoted by the so-called coordination-insertion mechanism. These nanocomposites were formed in presence of montmorillonite surface-modified by ammonium cations bearing hydroxyl group(s)…
The interaction of ammonium stearate (AS) and γ-aminopropyltriethoxysilane (APS) treatments with a magnesium hydroxide flame retardant filler and their effects on its use in an ethylene vinyl acetate copolymer compound have been investigated. The work has shown clear evidence of changes in the structure of the surface…
Single sized PbS nanocrystals are selectively deposited from the gas phase onto photoresist patterned substrates at atmospheric pressure, forming patterned nanocrystal thin films. Selective deposition is obtained by means of electrostatic control of the charged nanocrystals in the gas phase. The nanocrystal deposition…
In order to verify the thermal fragmentation of a molten jet dropped into a sodium pool at instantaneous contact interface temperatures below its freezing point, a basic experiment was carried out using molten copper and sodium. Twenty grams of copper was melted in a crucible with an electrical heater and was dropped…
In order to have a better idea of the interaction of the defect centres produced by y-irradiation with dislocation in the processes of deformation destruction, mechanoluminescence (ML) and thermoluminescence (TL) of gamma-irradiated CaSO4:Dy, these phosphors have been investigated. CaSO4:Dy phosphors were prepared by…
Visible light emission has been obtained at room temperature by photoluminescence (PL) and cathodoluminescence (CL) from Tb-doped B2N2CO thin films prepared by radio-frequency magnetron sputtering. The films were deposited by sputtering TbBn (n=4, 6, 12, 25, and 50) targets in an atmosphere of Ar and N2 gas mixture. T…
There is little information concerning the use of rare earths as dopants of Al2O3. This paper presents the preparation method and the results of studying the thermoluminescence characteristics of Al2O3:Eu exposed to ultraviolet light. Phosphor powder was obtained by the evaporation method. Optimum dopant concentration…
PbSe and PbS quantum dots (QDs) embedded in the oxide glass matrixes (SiO2–Na2CO3–ZnO–Al2O3–PbO2–B2O3) were synthesized by means of fusion method. Their optical properties have been studied both theoretically and experimentally. We found that the optical absorption is strongly dependent upon thermal-treatment processe…
Nano Si/C/N powders with different configurations were prepared by Chemical Vapor Deposition (CVD). The crystallinity of the products increased with increasing reaction temperature. The powder prepared at 1200 °C consisted of amorphous spherical particles with a particle size of 20 to 50 nm. The nanocrystalline partic…
The thermoluminescence (TL) glow curves of irradiated annealed and non-annealed synthetic beta-quartz (Li0.73Al0.73Si1.27O4) synthesised using the ceramic method have been studied. Annealed samples (1200 degrees C for 12 h) exhibit some changes of shape and intensity in the TL glow curves when compared to non-annealed…
The dielectric spectrum of an antiferroelectric liquid crystal is predicted by finding approximate analytic solutions to the Landau–Ginzburg equation describing its time dependent behavior. Two collective modes are predicted: (i) a low frequency mode that is caused by an in-phase rotation of the directors in adjacent…
The effects of different types of fibers on the physical and mechanical behavior of isotactic polypropylene (iPP) are reported. In particular, the flow behavior, mechanical properties (tensile, flexural and impact resistance) and morphology are examined. It has been found that all the fibers studied behave as effectiv…
Shape memory alloys (SMAs) have demonstrated the potential for various smart structure applications. SMAs undergo a reversible phase transformation from martensite to austenite as temperature increases. This transformation leads to shape recovery and associated recovery strains. If SMA actuators are embedded off the n…
Abstract Selected phosphorus/halogen flame retardant synergisms on cotton fabric substrates have been modelled using simple salt mixtures (sodium bromide and diammonium phosphate) and backcoating formulations based on combinations of ammonium polyphosphate, melamine phosphate and cyclic phosphonate with decabromodiphe…