Materials Literature
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Raman-scattering experiments on heavily irradiated pure and doped NaCl crystals are described. The experiments have been performed at room temperature and at approximately 25 K. The crystals had been irradiated up to a maximum dose of 95 Grad by means of electrons from a Van de Graaff accelerator. The Raman spectra sh…
Oxygen permeability (OP) and water vapor permeability (WVP) of sucrose polyesters (SPE) coatings were measured and compared with other edible and plastic films. the OP of SPE coatings was higher than those of corn-zein films and plastic films such as polyethylene and polypropylene films but was similar to OP of cellul…
Abstract Antimony(V)-phthalocyanine, [Sb(pc)Cl2]+ (where pc2− = phthalocyaninate, C32H16N82−), has been prepared and characterized for the first time. Of the metallophthalocyanines without any substituent groups so far reported, it has the Q-band at the longest wavelength and the smallest first ring-reduction potentia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-Liquid Equilibria for 2,3-Butanediol + Water + Organic Solvents at 303.15 KSadhana Sharma, Girish Pandya, Tapan Chakrabarti, and Purushottam KhannaCite this: J. Chem. Eng. Data 1994, 39, 4, 823–826Publication Date (Print):October 1, 1994Publication History Published o…
The structure of the tetragonal a-phase of lanthanide derivatives of (bis)phthalocyanine PcL III Pc ox (Pc=[C 32 H 16 N 8 ] 2- , Pc ox =[C 32 H 16 N 8 ] - , L=lanthanide) crystals is reported. The crystals of PcNdPc ox (I) and PcPrPc ox (II) crystallized on a platinum anode with (I) a=19.544 (2), c=6.514 (1) A, Z=2, P…
Far-infrared absorption and reflection spectra of ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$ glass have been measured in the frequency range 10--60 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ at room temperature. The absorption coefficient \ensuremath{\alpha}(\ensuremath{\nu}) has been determined as a function of frequency…
Half-leaky guided modes are used to determine accurately the cone angle in a smectic-${\mathit{C}}^{\mathrm{*}}$ liquid crystal as a function of temperature. Homeotropic alignment is obtained using only an in-plane electric field and electroclinic and voltage-induced effects are made negligible. The data obtained is f…
A modified Pechini chemical preparation technique was used to produce enstatite (MgSiO 3 ) powder. By this method, low‐temperature stable orthoenstatite (OE) was obtained at 850°C after 2 h of calcination. The effects of annealing temperature/time, initial particle size, chemical dopants, and shear stress on the conve…
A surface plasmon-polariton (SPP) polarizer with a shorter polarizer length can be realized by strong coupling of a metal film to a core, that is, by matching of the phase constant of the SPP wave in the metal film to that of the guided mode in the core and by selection of a suitably thin buffer-layer thickness. To ca…
Fluorescence and excitation spectra of ${\mathrm{Cm}}^{3+}$ diluted in ${\mathrm{ThO}}_{2}$ powder are reported at room and low temperatures. The observed ${\mathrm{Cm}}^{3+}$ spectra are from the cubic symmetry lattice site and are assigned to phonon-assisted electric dipole transitions and to magnetic dipole transit…
SBR-NBR and CR-NBR blends were prepared with different con centrations, namely 0, 20, 40, 60, 80 and 100%, and measured dielectrically over a wide frequency range (10 -2 -10 6 Hz) and at different temperatures (-10°-25°C). The aim of the present work is to employ the dielectric method to investigate the compatibility…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Route to Reduced Transition-Metal OxidesA. Manthiram, A. Dananjay, and Y. T. ZhuCite this: Chem. Mater. 1994, 6, 10, 1601–1602Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 October 1994https://doi.org/10.1021/cm0…
Results of atomistic modeling studies are reported which concern the axial relaxation of a niobium-substituting ${\mathrm{Fe}}^{3+}$ cation relative to an associated oxygen vacancy. The employed methods are shell-model simulations and embedded-cluster calculations. These simulation studies consistently show that the i…
A detailed recipe is given for the refinement of in-plane lattice-parameter and crystallite-size values of a turbostratic graphite-like structure through the profile fitting of the diffraction peaks from random layers. Folding of the theoretical line shape with the experimentally measured instrumental function provide…
A model has been developed to study the aggregation of rodlike particles in two dimensions using diffusion-limited aggregation. The model was also extended to examine the aggregation of rods, with binding rules similar to those seen with collagen molecules. The model showed that the aggregates that were formed from th…
The C–H bond activation of carbon-13 labeled ethane 1,2-di-13C–C2H6 at defect sites on an Ir(111) single-crystalline surface, cut and polished to 0.70°±0.15° of the (111) direction, has been determined quantitatively. These results have been obtained from a kinetic model accounting for diffusion from sites on the less…
We have examined the thermochromic behavior of thin films formed by mixing a fluoran dye (FD: 2 ′ -( o -chloroanilino)-6 ′ -di- n -butylaminospiro[isobenzofuran-1(3 H ),9 ′ -[9 H ]xanthene]-3-one) and octadecylphosphonic acid (P18). The coloring and discoloring states were revealed to be controllable by changing the r…
Abstract Poorly crystalline authigenic alteration products of basic pyroclastics from the Golan Heights, Israel, were investigated by XRD, DTA, TGA, FTIR and chemical analysis. Modeling XRD patterns with the use of NEWMOD code provided a way to identify these clays as random interstratified illite/smectites (I/S) with…
The use of surface-enhanced Raman scattering (SERS) as a detection method in gas chromatography (GC) was investigated by two different approaches; GC eluates were trapped either in liquid silver sol or on solid thin-layer chromatography (TLC) plates, previously coated with silver colloidal solution. Subsequently, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexation of Poly(vinyl alcohol)-Congo Red Aqueous Solutions. 2. SANS and SAXS Studies on Sol-Gel TransitionMitsuhiro Shibayama, Fumiyoshi Ikkai, and Shunji NomuraCite this: Macromolecules 1994, 27, 22, 6383–6388Publication Date (Print):October 1, 1994Publication History…