Materials Literature
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An explicit connection between the unoccupied single-particle states which are measured with electron energy loss or x-ray-absorption spectroscopy (EELS or XAS) and the occupied states which are involved in bonding is established by applying the force theorem to the tight-binding bond model. The resulting sum rule rel…
Interaction of cellulose with other polymers is reviewed from retrospective viewpoints, and future opportunities are discussed from prospective scopes. Previous investigations of the interaction of cellulose with other polymers and/or its existence in novel conformations include a brief overview of cellulose crosslink…
We study the effect of confinement on the phase behavior of a charge-stabilized colloidal suspension between two parallel charged plates. The electrostatic interaction of the counterions with the plates induces density inhomogeneity of the counterions. Our Monte Carlo simulations show that the external potential actin…
Upon irradiation with visible light (λ > 420 nm) in C 6 D 6 under Ar, dialkylsilicon porphyrins Si(TPP)R 2 (TPP = 5,10,15,20-tetraphenylporphinato) (R = CH 2 CH 2 CH 3 ( 1 ) and CH 2 TMS ( 2 )) reacted with nitroxy compounds, such as 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO), 4-oxo-2,2,6,6-tetramethylpiperidinyl-1-…
The pyrolytic decomposition of triethyl phosphate (TEP) has been studied at one atmosphere, from 706 to 854 K, in an isothermal quartz-lined, 4.5-cm-ID turbulent flow reactor with residence times between 15 and 85 ms. TEP was initially present at levels between 30 and 125 ppm, in N2. CO was used as an internal standar…
An ab initio MP2/6-311++G** study has been performed to obtain geometries, binding energies and vibrational properties of HCN-HX H-bonded complexes with X = F, Cl, NC, CN and CCH. These MP2/6-311++G** results have revealed that: (i) the calculated H-bond lengths are in very good agreement with the experimental ones; (…
‘Natural’ platelets are planar defects in {001} planes found in natural type-IaA/B diamonds. ‘Man-made’ platelets are platelets formed in the laboratory by annealing type-IaA diamonds at temperatures over 2500°C. Careful study shows that the infrared (IR) spectra of the ‘man-made’ platelets are different from the IR s…
Photoelectrochemical (PEC) etching of III–V semiconductors has been used to fabricate unique structures in electronic and photonic devices, such as integral lenses on light-emitting diodes, gratings on laser structures, and through-wafer via connections in field-effect transistors. The advantages and characteristics o…
The purpose of this paper is to investigate the preparation and properties of SrBi 2 Ta 2 O 9 ceramics as capacitors and/or piezoelectric materials. Ordinarily fired (OF) samples were prepared by a conventional ceramic technique. Grain-oriented (GO) samples were prepared by the hot-forging method. High-density OF samp…
An analysis is given of the contribution of various crystal imperfections to the rocking widths of reflections and the divergence of the diffracted beams. The crystal imperfections are the angular spread of the mosaic blocks in the crystal, the size of the mosaic blocks and the variation in cell dimensions between blo…
Cellulases and pectinases are used to treat raw cotton fibers and unscoured cotton fabrics. The structural changes in the surfaces of cotton caused by the enzymatic treat ments and resulting properties are the main focus of this study. Both staining tests and microscopy observations confirm that the cuticle is removed…
Band bending formation on thin nanocrystalline diamond films and field electron emission after post-growth treatments was investigated. It was found that treatment of the diamond surface with hydrogen plasma substantially decreases the density of point defects, forms the downward band bending and enhances the field el…
Raw Materials. Castable Refractories. Pumpable Castables. Plastic Refractories. Ramming Mixes. Gunning Mixes. Mortars. Coatings. Dry Vibratables. Wear Mechanisms. Manufacturing. Application Designs. Evaluation and Tests. Lining. Index.
Molybdenum thin films were deposited onto both soda lime glass and Al2O3 film by an alternate supply of MoCl5 and Zn. Zinc was used as a reducing agent. The film growth was performed over a temperature range of 400–500 °C in order to study the temperature effect on the growth. In addition to the growth temperature, th…
A barrier for the absorption of hydrogen molecules generated by a nonmetallic film on a metal surface may result in superpermeation of suprathermal hydrogen particles. Virtually all the sticking or implanted particles may permeate through the metallic membrane, with a permeation flux depending neither on the metal tem…
The structure of the glassy fast-ion conductor $g\ensuremath{-}{\mathrm{AgPS}}_{3}$ is studied by using the method of isotopic substitution in neutron diffraction. The diffraction pattern measured in a single experiment is separated into its contributions from the partial structure factor ${S}_{\mathrm{AgAg}}(k),$ and…
We present experimental results on surface relief gratings in GaAs and InP with high reflectivity (>85%) and polarization selectivity to normal incidence from the semiconductor side. The potential for polarization stabilization with a reduced mirror complexity for long-wavelength VCSELs is discussed.
Corrosion phenomena of alloy 625 (UNS N06625) were investigated in oxygenated aqueous solutions containing sulfuric acid (H2SO4), sodium hydrogen sulfate (NaHSO4), or sodium sulfate (Na2SO4) and in deaerated H2SO4 solution. Tests were conducted at temperatures and pressures up to 500°C and 38 MPa, respectively. Corros…
Theoretical coulovoltammograms associated with the evolution of anodic charges when a polypyrrole film, which was previously compacted at a strong negative potential in a 0.1 M LiClO 4 propylene carbonate solution, was submitted to anodic potential sweeps were compared with experimental responses. The electrochemicall…
Abstract This work demonstrates the validity of approximating cathodoluminescence generation throughout the electron interaction volume by the total electron energy loss profile. The energy loss profiles in multilayer specimens were accurately calculated using the Monte Carlo simulation CASINO. Resolution of cathodolu…