Materials Literature
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The main objective of this study is to investigate the effect of filler content and filler size on the water absorption behaviour of phenolic composites filled with oil palm shell flour, rice husk flour and coconut shell flour. Lignocellulosic phenolic composites with three different filler sizes (<38 μm, 38–75 μm…
Tetragonal Pb(Zr, Ti)O3 films were epitaxially grown on SrRuO3-coated SrTiO3 substrates by metal organic chemical vapor deposition. Perfect polar-axis-oriented 50 nm thick tetragonal films were successfully grown on (100)SrRuO3//(100)SrTiO3 substrates. The single phase of the tetragonal symmetry region was expanded to…
This paper first demonstrates that the estimation of fractional solid composition of two diastereomers is possible by incorporating Raman spectra, slurry density, and temperature into a partial least squares (PLS) model. Since slurry density measurement is not readily available, the online estimation is obtained throu…
In earlier work by March and Matthai [Phil. Mag. Lett. 84 335 (2004)], the energy gaps E g of the diamond-type semiconductors C, Si, Ge and α-Sn were shown to correlate well with the mean interelectronic separation r s of the 4 valence electrons per atom. Furthermore for the III-V analogues such as GaAs and InSb, it w…
The dynamics of propagation of periodic electromagnetic waves and the related electric current in bundles of carbon nanotubes is studied. The study is based on an analysis of coupled equations for the classical electron distribution function in carbon nanotubes and the Maxwell equations for an electromagnetic field. A…
Abstract Summary: Light‐driven devices based on reversible change of carrier mobility in semiconducting polymers were investigated. The mobility was altered using a photochromic spiropyran capable of a reversible change of permanent dipole moment and ionization potential. While the latter attribute may result in forma…
Large strain-amplitude oscillatory shear flows can cause significant structural changes in concentrated suspensions of deformable colloidal spheres that have volume fractions exceeding the quiescent jamming limit of hard solid spheres. In contrast to hard spheres, which can jam, lock-up, and even break fixed-gap shear…
We have investigated the temperature dependence of the Hall coefficient and the resistivity of an organic Mott insulator, β'-(BEDT-TTF) 2 ICl 2 under ambient and hydrostatic pressures up to 2 GPa. The charge gap, Δ, the effective mass, m * , and the scattering lifetime of carriers on Mott Hubbard bands were evaluated…
Films of polyacrylonitrile and lignin cast from dimethylformamide were studied by dynamic thermal analysis in a self-generated atmosphere and in a vacuum. The occurrence of a thermochemical reaction of the components on heating was demonstrated. The optimal conditions of the reaction between polyacrylonitrile and lign…
Introduction: Exposure to space radiation will be a limiting factor in future manned missions to the moon. In contrast to the brief stays by the Apollo astronauts, in the coming decades humans will remain on the lunar surface for weeks and eventually months at a time. Chronic exposure to highly ionizing ions in the ga…
The PERMCAT process, chosen for the final clean-up stage of the Tritium Exhaust Processing system in ITER, directly combines a Pd/Ag membrane and a catalyst bed for the detritiation of gaseous mixtures containing molecular and chemically bound tritium. Upgraded PERMCAT mechanical designs have been proposed to both inc…
Phase transition behaviour in ferroelectric materials is strongly dependent on boundary conditions, both electrical and mechanical. In this article, we cover several topics. Beginning with thin films, we look at the suppression of ferroelectricity as film thickness is reduced, covering two situations, the first in whi…
Catalytic systems containing palladium, copper, and iron compounds on carbon supports—kernel activated carbon and fibrous carbon materials (Karbopon and Busofit)—for the low-temperature oxidation of CO were synthesized. The effects of the nature of the support, the concentration and composition of the active component…
Physical (e.g., temperature and light) and biogeochemical (e.g., cycling) parameters are known to affect bioavailability and toxicity of nutrients and pollutants to microorganisms. A system that would allow exposure of selected microorganisms to in situ conditions could provide relevant and novel evaluations of bioava…
Electron emission concentrates selectively on the (100) surface at the top of a needle-shaped tungsten tip when a slight amount of Y2O3 powder is put on the side surface of the tip and heat-treated afterward [T. Kawakubo et al., J. Vac. Sci. Technol. B 22, 1258 (2004)]. The work function determined by the Fowler-Nordh…
We report here a simple one-pot directed synthesis of an oxomolybdate urea composite in which elementary molybdenum oxide building blocks are linked together with the aid of urea. This type of directed material design resulted in large rod-like crystals of an inorganic-organic hybrid extended structure of {MoO 3(NH 2-…
Abstract Summary: Nanocomposite films were prepared by two methods in which lead sulfide (PbS) nanocrystals were contained in an organic matrix. One method used a wet chemical synthesis of the nanocrystals in the direct presence of a polymer, where the polymer controlled nanocrystal growth. The second method was gaseo…
Sapphire (α-Al 2 O 3 ) single crystals grown using the Verneuil and Kyropoulos methods have been analyzed using electron paramagnetic resonance and γ-ray spectroscopy with 12-MeV bremsstrahlung excitation. It is established that uncontrolled impurities in the final sapphire single crystals grown by the Kyropoulos meth…
Catalytic performance of gallia-supported iridium catalysts in the reaction of selective hydrogenation of crotonaldehyde in the gas phase was studied and compared to that of platinum and ruthenium catalysts. The best catalytic properties in terms of the selectivity to crotyl alcohol are shown by 5 wt % Pt/α-Ga2O3 and…
The authors used a complement of depth-resolved cathodoluminescence spectroscopy (DRCLS), atomic force microscopy (AFM), and Kelvin probe force microscopy (KPFM) to correlate the formation of native point defects with interface chemical reactions as well as surface morphology. A wide array of ZnO crystals grown by bot…