Materials Literature
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Transmission measurements have been performed in reduced ${\mathrm{SrTiO}}_{3}$ between 300 and 17 K for different concentrations of oxygen vacancies. A midinfrared absorption band has been observed, whose behavior with doping and temperature is accounted for by an intraband scattering process, phonon or disorder assi…
In this study, we have confirmed the ability of liposome-encapsulated doxorubicin to modulate drug resistance, as previously observed in CH LZ cells (Thierry et al., Cancer Commun. 1, 311-316, 1989), in two human multidrug-resistant (MDR) cell lines, the breast cancer MCF-7/ADR cell line, and the ovarian carcinoma SKV…
Abstract The mechanism of esterification of cotton cellulose by a polycarboxylic acid was investigated using Fourier transform infrared spectroscopy (FT‐IR). The infrared spectroscopic data indicate that a polycarboxylic acid esterifies with cotton cellulose through the formation of an acid anhydride intermediate. A f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDihydroazulene/vinylheptafulvene photochromism: effects of substituents, solvent, and temperature in the photorearrangement of dihydroazulenes to vinylheptafulvenesHelmut Goerner, Christian Fischer, Sebastian Gierisch, and Joerg DaubCite this: J. Phys. Chem. 1993, 97, 16, 41…
The bulk modulus of \ensuremath{\beta}-boron has been measured up to 10 GPa by neutron powder diffraction using an opposed-anvil pressure cell. The bulk modulus of \ensuremath{\alpha}-boron has also been measured to 5 GPa by single-crystal x-ray techniques. The values have been determined to be 185(7) GPa for \ensurem…
This work analyzes the size and the boundary effects of a gallium arsenide- (GaAs) based quantum well (QW) structure on the thermal conductivity of the well material. Calculations show that the order of phonon mean free path (MFP) is equal to or even longer than the typical dimension of the well (-200 A or less). Holl…
Nickel oxide films were deposited by reactive RF magnetron sputtering. Optical and electrochemical characterization showed strong electrochromic activity under certain deposition conditions. X‐ray diffraction and infrared absorption measurements indicate that the films are polycrystalline and that the bulk crystal str…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelationship between energy and hardness differencesJose L. Gazquez, Ana Martinez, and Francisco MendezCite this: J. Phys. Chem. 1993, 97, 16, 4059–4063Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://p…
A transparent glass plate was roughened at the submicron level, and then a chemically adsorbed monolayer of a fluorocarbon compound was formed along the glass surface. The monolayer was prepared using the chemical coupling reaction accompanying dehydrochlorination between a chlorosilyl group of the heptadeca-fluorodec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas/vapor adsorption in imogolite: a microporous tubular aluminosilicateWilliam C. Ackerman, Douglas M. Smith, Jeffrey C. Huling, Yong Wah Kim, Joseph K. Bailey, and C. Jeffrey BrinkerCite this: Langmuir 1993, 9, 4, 1051–1057Publication Date (Print):April 1, 1993Publication…
The temperature dependence of infrared reflection spectra of single crystals of n-type strontium titanate doped with 0.3 to 1.5 at. % niobium are reported from 10 to 5 000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ in the temperature range 80--900 K. Results are analyzed by means of various factorized forms of the die…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton and carbon-13 NMR investigations of lead zirconate titanate (Pb(Zr,Ti)O3) thin-film precursor solutionsR. A. Assink and R. W. SchwartzCite this: Chem. Mater. 1993, 5, 4, 511–517Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Publish…
In a number of isostructural sesquioxides M 2 O 3 (M=Sc, In, Y, Yb, Dy, Ho, Sm, Gd) with the bixbyite structure the electric field gradients at substitutional 111 Cd nuclei show a regular and smooth dependence on the lattice constant. The electric field gradients allow the positions of all atoms in the unit cell to be…
Single-crystal structure determinations of the spin crossover compounds [Fe(ptz) 6 ]X 2 , and [Fe(mtz) 6 ]X 2 (ptz=C 3 H 7 N 4 CH, mtz=CH 3 N 4 CH, X=BF 4 , ClO 4 ) have been performed at different temperatures. The temperature dependence of the lattice constants was measured for the two mtz compounds between 300 and…
We examined partial or complete replacement of synthetic sorbents by cotton- containing nonwovens for use in oil spill cleanup. The results indicate that with light crude oil, oil sorption capacities of the needlepunched cotton-containing sorbents were slightly greater than those of sorbents made from 100% polypropyle…
A detailed atomistic approach has been used to investigate the kinematics of plastic deformation in glassy atactic polypropylene to 20% strain. The microstructural stress-strain behaviour was found to consist of smooth reversible portions bounded by irreversible sharp stress drops indicating plastic rearrangement of t…
Structure and Dynamics of Lanthanoid Tetraazacyclododecanetetraacetate DOTA Complexes in Solution In aqueous solution lanthanoid DOTA complexes exist as a mixture of two stereoisomers, and their structures have been determined from the dipolar parts of the observed 1 H‐NMR chemical shifts for EuDOTA and YbDOTA. The re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and ceramic conversion reactions of borazine-modified hydridopolysilazanes: new polymeric precursors to silicon nitride carbide boride (SiNCB) ceramic compositesKai Su, Edward E. Remsen, Gregg A. Zank, and Larry G. SneddonCite this: Chem. Mater.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLateral instabilities in a grafted layer in a poor solventChuck Yeung, Anna C. Balazs, and David JasnowCite this: Macromolecules 1993, 26, 8, 1914–1921Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of the isotropic-nematic-nematic phase separation for a solution of bidisperse rodlike particlesG. J. Vroege and H. N. W. LekkerkerkerCite this: J. Phys. Chem. 1993, 97, 14, 3601–3605Publication Date (Print):April 1, 1993Publication History Published online1 May 2002P…