Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacteristics of laminar jet impactorsVirgil A. Marple and Benjamin Y. H. LiuCite this: Environ. Sci. Technol. 1974, 8, 7, 648–654Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://doi.org/10.1021/es60092…
ADVERTISEMENT RETURN TO ISSUEPREVArticleDesign and synthesis of organic metalsAnthony F. Garito and Alan J. HeegerCite this: Acc. Chem. Res. 1974, 7, 7, 232–240Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ar50079a004htt…
The structural changes on heat-setting and friction-twisted texturing of commercial nylon 6 multifilament yarn have been studied over a range of heater temperature and heater-contact time. Both heat-setting and texturing result in increase of crystalline content and decrease of crystallite orientation. The changes in…
A zone of diffuse non-Hookean shear strain is shown by birefringence measurements to initiate before, and to propagate ahead of, shear bands in glassy polystyrene. A moiré analysis of the displacements around the propagating shear band packet reveals that the shear band packet, although highly visible, contributes onl…
A calculation scheme for the evaluation of hyperfine field distributions from overlapped Mossbauer spectra is being proposed. A different procedure for the same purpose has been used by Window (1971). Based on simulated Mossbauer spectra both methods are applied for three special cases. The obtained results are compar…
Specimen size dependences of the dielectric constant and of its variations with temperature have been investigated by measuring the optical plasma resonance absorption of small silver particles embedded in glass. The following relations hold at the wavelength 405 nm: epsilon 2 (imaginary part at 300K)=0.23+2.64/R, and…
Abstract In 1973, Clark & Walker showed that the GR1 doublet splits, under uniaxial stresses, in a way closely characteristic of transitions between E and A ground states and a T excited state. To clear up certain anomalies in their results, and to extend the analysis, independent experimental results are describe…
The temperature dependence of the longitudinal sound velocity has been measured in vitreous silica between 0.28 and 4.2 K and at frequencies between 30 and 150 MHz. With decreasing temperature the sound velocity does not increase monotonically towards its value at $T=0$ K, but reaches a maximum around 2 K and decrease…
A generalization of Wilson's renormalization group equation is discussed. A large class of equivalent fixed points exists for each fixed point. The eigen perturbations fall into two classes: (i) scaling operators whose scaling exponents are independent of the fixed point within the class of equivalent fixed points, an…
The magnetic structure of the layer type compound α-NaFeO2 has been determined. The magnetic ordering scheme is distinctly different from that in NaCrX2 (X = S, Se), in accordance with the fact that no two-dimensional behaviour has been observed. An estimation for the magnitude of the various exchange interactions has…
An attempt was made to draw conclusions about elementary growth situations on the basis of typical doping inhomogeneities observed in dislocation-free float-zoned silicon crystals. Both nucleation and lamellar growth were equally recognized to be predominant factors in crystallization phenomena and discussed in terms…
The Mössbauer absorption in BaFe12−xAlxO19, SrFe12−xGaxO19, and Ba1−ySryFe12−xAlxO19 compounds has been investigated. Measurements carried out at T < Tc allowed to determine the behaviour of the hyperfine magnetic fields of the Fe3+ ions in the five sublattices of these structures for some values of x as a function of…
Results are reported on the electric and magnetic properties of (Bi1−xLax)FeO3 solid solution exhibiting simultaneously long-range order of electric and magnetic dipoles. In the concentration range 0 ≦ x < 0.30 close to the Néel temperature, an anomaly of ϵ(T) attributed to the influence of a decay of magnetic orderin…
The dielectric parameters are investigated as a function of composition, frequency, and temperature in copper containing ferrites. An “abnormal” behaviour of the dielectric constant is found and also the loss factor as a function of frequency and temperature in comparison with the “normal” behaviour of spinel ferrites…
A process for the conversion of far-infrared radiation to visible light in CdS is reported which is sensitive to a band of infrared. Two exciton levels are utilized, the lower of which is pumped by a visible light source. It is not required that the visible or the infrared be resonant between the two levels.
A new empirical set of "effective ionic" radii for tetravalent atoms in 6-coordination has been constructed. It is based on V 1/3 vs. r plots for isostructural series of M 4+ compounds of high symmetry. The radius values resulting from a non-linear least-squares refinement of all the data have been adjusted to coincid…
Relative subshell-photoionization cross sections have been measured directly for solid samples of sodium fluoride and sodium chloride by the technique of x-ray-photoelectron spectroscopy. Values are reported for the subshell-photoionization cross sections of the sodium $2s$ and $2p$; chlorine $2s$, $2p$, $3s$, and $3p…
Memory and threshold switching processes are described, as observed in systems consisting of thin (∼0.5 μ) polymer films (polymethylmethacrylate, polystyrene, polyethylmethacrylate, polybutylmethacrylate) between inert electrodes (graphite, molybdenum, NESA glass). The memory off-state is highly linear, in contrast to…
The high-resolution x-ray photoemission spectra (XPS) of the total valence bands of atomically clean diamond, graphite, and glassy carbon, obtained with monochromatized Al $K\ensuremath{\alpha}$ radiation, are reported and discussed. By comparing valence-band and carbon-$1s$ photoelectron kinetic energies, the XPS val…
A Monte Carlo simulation is applied to investigate the escape process of the secondary electrons in a metal. The calculated energy distribution of secondary electrons agrees satisfactorily with the experimental results. The lateral distribution of secondary electrons is also calculated and is similar 10 Å for normal i…