Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetailed analysis of the optical absorption and emission spectra of europium(3+) in the trigonal (C3) Eu(DBM)3.H2O systemAndrew F. Kirby and F. S. RichardsonCite this: J. Phys. Chem. 1983, 87, 14, 2544–2556Publication Date (Print):July 1, 1983Publication History Published on…
Amorphous, electrically conducting polymeric films can be deposited from acetonitrile solutions of specific aromatic compounds containing an appropriate electrolyte. Free-standing films peeled off a platinum electrode have electrical conductivities σ between 10−3and 1 Ω−1-cm−1. Polymers resembling the better-known pol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA versatile phase equilibrium equation of statePaul M. MathiasCite this: Ind. Eng. Chem. Process Des. Dev. 1983, 22, 3, 385–391Publication Date (Print):July 1, 1983Publication History Published online1 May 2002Published inissue 1 July 1983https://pubs.acs.org/doi/10.1021/i20…
The mechanical and conducting properties of free-standing films of polypyrrole toluenesulfonate depend on the preparation conditions. Films prepared in aqueous ethylene glycol solvent mixtures show a variation of two orders of magnitude in the conductivity and of a factor of three in the tensile strength.
Radiationless energy transfer from excited dye molecules to silver islands has been studied. The dye is separated from the metal surface by a thin layer of SiOx. When the spacer layer thickness is increased from d=0, an increase in the luminescence intensity is observed. For the low quantum yield dye Basic Fuchsin, a…
Theoretical calculations are presented for equilibrium concentrations of zinc and oxygen vacancies in ZnO. Results are presented at the sintering temperature, and also at room temperature. Theoretical calculations of reaction constants show that the intrinsic donor is the oxygen vacancy, rather than the zinc interstit…
The preparation and high resolution observation of frozen hydrated thin sections has been studied by transmission electron microscopy (TEM and STEM) on model systems, including pure water, protein solutions, catalase crystals, myelin sheath and various tissues. The state of the ice is determined by electron diffractio…
Defect centers induced by ionizing radiation (50–100-keV x rays, 60Co γ rays) in high purity P-doped silica glass have been observed and elucidated by ESR spectroscopy. Four generic species are well characterized on the basis of the observed 31P hyperfine splittings and g values as defects analogous to PO2−3 (phosphor…
O Glatter and O Kratky 1982 London: Academic x + 515 pp price £43.60 This book is very timely since no comprehensive treatment of small angle x-ray scattering has been published since the 1955 book by Guinier and Fournet, which has been out of print for a long time. Some review papers and conference proceedings have a…
An analysis is made of the many theoretical and experimental studies of layered crystals. The results of this analysis for the particular case of group III-VI semiconductors are used to investigate the features in the electronic and phonon spectra which are due to the manifest structural anisotropy of these compounds.…
The orientational disorder of the NO 2 groups can be described either by Ising spins or by classical continuous spins. Only the latter description can explain the experimentally observed temperature dependence of the wavevector-dependent orientational susceptibility. The deficiency of the Ising spin description is two…
Abstract Nitrobenzooxadiazole-phallacidin binds specifically to the microfilamentous bundles associated with the raphe of a motile diatom, providing evidence for the actin-like nature of the filaments. Since the raphe is implicated in cell locomotion the locomotive force may be generated by the associated microfilamen…
The first experimental investigation of nucleation, growth, and coalescence in a polymer solution near the critical point is reported. A large asymmetry is observed in the kinetics of phase separation although the coexistence curve itself is only slightly asymmetric near the critical point. The observed effects are ex…
The low-energy regime (0.1-0.3 eV) of the electron-energy-loss spectrum from a clean Cu(100) surface has been measured. The experimental data show excellent agreement with predictions from a jellium calculation of the response function $g({q}_{\ensuremath{\parallel}}, \ensuremath{\omega})$. The weak inelastic signal d…
The authors present results of a neutron scattering study of the fast oxide ion conductor delta Bi 2 O 3 ; both pure and Y 3+ -doped materials are studied. The authors' results reveal extensive disorder with oxygen distributed over lattice and interstitial sites.
The band structure of Mn-based Heusler alloys of the $C{1}_{b}$ crystal structure (MgAgAs type) has been calculated with the augmented-spherical-wave method. Some of these magnetic compounds show unusual electronic properties. The majority-spin electrons are metallic, whereas the minority-spin electrons are semiconduc…
When a solution of collagen molecules, at neutral pH and moderate ionic strength, is warmed from 4 degrees to 30 degrees C, a spontaneous self-assembly process takes place in which native-type collagen fibers are produced. Events occurring during thermally induced fibrillogenesis process can be monitored, in aqueous m…
Thermoluminescence measurements of 80 K X-irradiated CaO and CaO: Li single crystals are reported. In pure CaO five glow peaks at 105, 130, 175, 205, and 275 K are associated with the thermal release of holes from different traps. All these peaks show a main emission band at 610 nm which coincides with the main band o…
A model of magnetization processes is proposed which postulates the existence of two types of domain walls (resonating and relaxating) and takes into account the distribution of grain sizes in polycrystalline ferrite specimens. Mathematical expressions for approximation of magnetic spectra are obtained. The suggested…
N 2 diffuses into the structural pores of clinoptilolite 10 3 to 10 4 times faster than does CH 4 . Thus internal surfaces are kinetically selective for N 2 adsorption. Some clino samples are more effective at N 2 /CH 4 separation than others and this property was correlated with the zeolite surface cation population.…