Materials Literature
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A new physical model for a humidity-sensitive metal–insulator–semiconductor (MIS) capacitor with porous thin film is proposed. The model is used to determine water adsorption isotherm and calculate pore-size distribution of the film. The relative-humidity dependences of the capacitance and resistance of the film were…
Poly(ethylene glycol) (PEG) and a hydrophobic-hydrophilic microdomain structured block copolymer comprising poly(2-hydroxyethyl methacrylate) and polystyrene (HEMA-St) have been reported to show good blood compatibility owing to inhibition of platelet activation. By using a computer-assisted novel technique to analyze…
Insulting amorphous ${\mathrm{Ti}}_{x}{\mathrm{Si}}_{100\ensuremath{-}x}(x<9.5)$ alloys are characterized by the Mott-type variable-range hopping (VRH) conduction and a finite electronic specific heat coefficient $\ensuremath{\gamma}$ at low temperatures. We use magnetoresistance data to deduce the localization rad…
The maximum entropy principle is applied to a conducting band with energy wave vector dispersion of general form and to an arbitrary number of generalized kinetic fields. By considering a linear expansion around a local Maxwellian, within a total average energy scheme, we obtain a closed system of hydrodynamic equatio…
Ageing properties of weak field dielectric constant and losses of (Hf, Zr)-doped BaTiO 3 ceramics in various crystalline phases are studied, and compared with those of pure tetragonal BaTiO 3 ceramics. At room temperature, the ageing process develops following two different mechanisms: a thermally activated ageing pro…
The pressure–temperature phase diagram of SnI4 was investigated to examine the inherent instability of crystalline SnI4 in terms of undergoing pressure-induced solid state amorphization, by conducting molecular dynamics simulations prior to studies involving laboratory experiments. The SnI4 molecules are regarded as r…
The polyaddition of bis(3-ethyl-3-oxetanylmethyl) terephthalate (BEOT) with dichlorodiphenylsilane (CPS) using tetrabutylammonium bromide (TBAB) as a catalyst proceeded under mild reaction conditions to afford a polymer containing silicon atoms in the polymer main chain. A poly(silyl ether) (P-1) with a high molecular…
This study evaluated the effects of crystalline polyamide (Nylon-66), poly(ethylene-co-vinyl alcohol) (PEVA), and poly(vinylidene fluoride) (PVDF) polymers with nonporous and porous morphologies on the ability of monocytes to adhere and subsequently activate to produce IL-1beta, IL-6, and tumor necrosis factor alpha.…
Ag 2 O particles of sizes varying from 6.0 to 16 nm have been prepared by a chemical method. These have been subjected to a heat treatment at temperatures varying from 533 to 623 K. The optical absorption spectra of the heat treated particles dispersed on a glass substrate have been delineated. The absorption peak sho…
We have measured both the magnetoresistance and differential conductance of multiwalled carbon nanotubes as a function of magnetic field perpendicular to the tube axis. The measured differential conductance showed a large depletion of the density of states near the Fermi level and its magnitude was changed with a magn…
We have performed ab initio density functional theory calculations with the generalized gradient approximation to investigate CO oxidation on Ru(0001). Several reaction pathways and transition states are identified. A much higher reaction barrier compared to that on Pt(111) is determined, confirming that the Ru is ver…
The thermodynamic-equilibrium structures of four copolymers with different chain architectures are compared. They are AB diblock, BAB triblock, and ABC triblock copolymers and AB2 star-branched graft copolymers. Their morphological transitions meaningfully differ from one another, reflecting the difference in chain ar…
Pores in porous 4H–SiC are found to propagate first nearly parallel with the basal plane and then gradually change plane of propagation towards the direction of the c axis. A similar anisotropy in pore propagation is found in porous 6H–SiC. A disordered phase is encountered at the interface between crystalline SiC and…
Nanocrystalline particles of ZnS:(Ag, Al) semiconductor phosphor, whose sizes are mostly 3–5 nm in diameter, are prepared by the gas-evaporation method with cw CO2 laser heating. The Raman scattering spectrum as well as the transmission electron microscope observation demonstrates that the crystallization of the nanop…
Generalized ΔM plots, which allow interactions to be investigated for any starting remanence state, have been used in the analysis of interactions in particulate magnetic recording media for three samples [very high speed (VHS) videotape, Ba-ferrite dispersed particles oriented and nonoriented]. The results have been…
Nonequilibrium growth of thin-film ternary ZnS1−xSex semiconductor alloys was accomplished using physical vapor deposition with simultaneous electron cyclotron resonance H2S plasma activation. Substrate temperature, gas flow, and plasma power determine the ZnS1−xSex alloy composition and structure. Integrated optical…
The dielectric function of ${\ensuremath{\alpha}}^{\ensuremath{'}}$-${\mathrm{NaV}}_{2}{\mathrm{O}}_{5}$ was measured with electric field along the a and b axes in the photon- energy range 0.8--4.5 eV for temperatures down to 4 K. We observe a pronounced decrease of the intensity of the 1-eV peak upon increasing tempe…
Comparative ab initio restricted Hartree–Fock (RHF) and density functional theory (DFT) calculations were performed to investigate the geometric and electronic structures of various neutral aniline oligomers. These oligomers were selected to model polyaniline (PANI) in different intrinsic oxidation states, with an aim…
We have fabricated a vertically aligned 4-domain nematic liquid crystal display cell with thin film transistor. Unlike the conventional method constructing 4-domain, i.e., protrusion and surrounding electrode which needs additional processes, in this study the pixel design forming 4-domain with interdigital electrodes…
A systematic theoretical analysis of electronic states and thermoelectric transport in $\mathrm{PbTe}/{\mathrm{Pb}}_{1\ensuremath{-}x}{\mathrm{Eu}}_{x}\mathrm{Te}$ quantum well structures is presented, employing more realistic well model than has been used up to now. The carrier scattering both on optical and acoustic…