Materials Literature
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Abstract The transformation from smectite to chlorite has been interpreted as involving either a disequilibrium chlorite/smectite mixed‐layering sequence, or an equilibrated discontinuous sequence involving smectite–corrensite–chlorite. Here, analysis of the smectite to chlorite transition in different geothermal syst…
Functionally graded cathodes were fabricated by slurry coating process for honeycomb solid oxide fuel cells with yttria-stabilized zirconia (YSZ) electrolytes. The cathodes are composed of strontium-doped lanthanum manganate (LSM), gadolinia-doped ceria, and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF). The LSM content was…
The isolation and characterization of new lanthanide complexes of formula [Ln(QL)3(EtOH)(H2O)], (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb; HQL = 1-phenyl-3-methyl-4-phenylacetylpyrazol-5-one) [Ln(QL)3(H2O)2] (L = La or Lu), [Ln(QS)3(EtOH)(H2O)] (Ln = Tb or Eu; HQS = 1-phenyl-3-methyl-4-thienoylpyrazol-5-one…
A mild aqueous synthesis route was successfully established to synthesize well crystallized and monodisperse GaP and InP nanocrystals, which were proved to exhibit pronounced quantum confinement by room-temperature UV/Vis adsorption and photoluminescence (PL) spectra.
A test equipment was designed to study thermal shock and thermal fatigue of ceramic materials subjected to fast heating (ascending). The equipment was designed to generate thermal stress in a test specimen by heating one surface of it by an oxy-hydrogen flame while cooling the opposite surface. The sample cracked when…
This paper reviews research work concerning the size distribution of product crystals in batch crystallization of well-soluble materials. The discussion was made with particular emphasis on seeding effect on product crystal size distribution and crystallizer performance. First, it is shown by a brief survey of the his…
For the first time highly efficient photon energy up-conversion (anti-Stokes photoluminescence) has been observed in colloids of CdTe nanocrystals (NCs) and CdSe NCs covered by ZnS shell. The maximum magnitude of the up-converted blue shift ΔEUCmax = 335 meV was obtained for CdSe/ZnS NCs under excitation by a low-powe…
Polycrystals undergoing ductile deformation develop lattice‐preferred orientation (fabric) as a result of intracrystalline slip. A consequence of fabric development is that bulk physical properties become anisotropic. Fabric development and macroscopic deformation are studied by examining three effects: nearest‐neighb…
A conceptual-scale continuous pyroelectric converter was constructed and tested. Low-grade heat was converted to electricity using a single 25 @ m thick 60%-40% P(VF 2 -TrFE) copolymer film. A pyroelectric conversion cycle conceived by Olsen was adopted; external control voltage was cycled between high and low in sync…
Surface modification of poly(lactic acid) (PLA) film surface by Ar-plasma was investigated by contact angle measurements and XPS in order to answer the following two questions. (1) Could the Ar-plasma modify the PLA film surfaces? (2) What chemical reactions occurred on the film surfaces during the Ar-plasma treatment…
Microemulsions (oil-in-water) have been used as templates to engineer stable emulsifying wax and Brij 72 (polyoxyl 2 stearyl ether) nanoparticles. The technique is simple, reproducible, and amenable to large-scale production of stable nanoparticles having diameters below 100 nm. Investigation of the process variables…
Abstract—We use the three dimensional Finite Difference Time Domain (FDTD) technique to study metamaterials exhibiting both negative permittivity and permeability in certain frequency bands. The structure under study is the well-known periodic arrangement of rods and split-ring resonators, previously used in experimen…
There have been numerous efforts in processing metallic alloys into fine-grained materials, so as to exhibit high strain rate superplasticity (HSRSP) and/or low temperature superplasticity (LTSP). The current study applied the most simple and feasible one-step extrusion method on the commercial AZ31 magnesium ingot to…
A zero order lumped parameter control oriented model of a Selective Catalytic Reduction (SCR) catalyst is presented. The lumped parameter model is developed using two approaches. in the first approach it was assumed that the catalyst behaves as an Isothermal Continuously Stirred Tank Reactor (ICSTR). The second approa…
Polypyrrole (PPy) films deposited by the galvanostatic method at 4°C with polymerization charges equal to/less than 1.0 C cm −2 were demonstrated to exhibit ideally capacitive characteristics with a high specific capacitance of 268 F g −1 for application to electrochemical supercapacitors. Influences of the polymeriza…
The second-phase particles (SPP) play an important role on the corrosion and hydriding properties of BWR Zircaloy-type materials. It has been proposed that the chemical composition of the SPPs as well as the SPP size distribution strongly affect the in-reactor performance. Zr-Fe, Zr-Cr, and Zr-Ni binary alloys were pr…
Cutometer is a commercially available non-invasive suction skin elasticity meter. The present study discusses some aspects of the biological informativeness and interpretation of the results obtained in studying skin mechanical properties with cutometer. We analyze the results of previously published studies on the me…
The function of oxygen storage capacity (OSC) is very important to improve a performance for an automobile exhaust catalyst. CeO2-ZrO2 solid solution has an excellent OSC, and is available for a catalytic promoter. In this paper, OSC of the CO reduced CeO2-ZrO2 solid solution having various composition loaded with Pt…
A method for the preparation and characterization of bioinorganic conjugates made with highly luminescent semiconductor CdSe–ZnS core-shell quantum dots (QDs) and antibodies for use in fluoroimmunoassays is presented. The conjugation strategy employs two routes: 1. Use of an engineered molecular adaptor protein, attac…
A three dimensional modified cellular automaton model (3-D MCA) was developed in order to simulate the evolution of microstructures in solidification of alloys. Different from the classical cellular automata in which only the temperature field was calculated, this model included the solute redistribution both in liqui…