Materials Literature
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Abstract The 10-Å clay components of sedimentary rocks (“illites”) are commonly mixtures of 100% nonexpandable illite and an ordered illite/smectite mixed-layer mineral. If the proportion of the illite/ smectite in a mixture is sufficient to produce a measurable reflection between 33–35°2 θ (CuK α radiation) that is n…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotosensitized electron injection in colloidal semiconductorsJacques Moser and Michael GraetzelCite this: J. Am. Chem. Soc. 1984, 106, 22, 6557–6564Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October 1984https://…
Abstract Extremely small CdS particles were prepared in propanol−2 solution at − 78°C and in aqueous solution in the presence of sodium hexametaphosphate at room temperature. These colloids are colorless. Their UV absorption spectra exhibit several maxima. Aging of the colloids is accompanied by intensity variations i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface spectroscopic characterization of manganese/aluminum oxide catalystsBrian R. Strohmeier and David M. HerculesCite this: J. Phys. Chem. 1984, 88, 21, 4922–4929Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 Oct…
Abstract Wood pulp fibers possess strength and modulus properties which compare favorably with glass fibers when the differences in fiber densities are considered. Softwood pulp fibers with fiber aspect ratios near 100 are readily dispersed into high‐density polyethylene or isotactic polypropylene with the aid of carb…
Lev Mikhaylovich Blinov 1983 Chichester: John Wiley xxi + 341 pp price £35.95 ISBN 0 471 10231 8 This is a survey of the properties of liquid crystals, ranging much more widely than its title suggests. As well as describing the astonishing variety of behaviour displayed when electromagnetic fields act on liquid crysta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleTheoretical studies of surface enhanced Raman scatteringGeorge C. SchatzCite this: Acc. Chem. Res. 1984, 17, 10, 370–376Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October 1984https://pubs.acs.org/doi/10.1021/ar00106a…
Inhomogeneities in thin films have a large influence on the optical transmission spectrum. If not corrected for, this may lead to too large calculated values for the absorption coefficient or the apparent presence of an absorption band tail as well as serious errors in the values of refractive index and thickness. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysical effects of metal-carbon .sigma. bonds in ortho-metalated complexes of iridium(III) and rhodium(III)S. Sprouse, K. A. King, P. J. Spellane, and Richard J. WattsCite this: J. Am. Chem. Soc. 1984, 106, 22, 6647–6653Publication Date (Print):October 1, 1984Publicati…
Laser vaporization of a substrate within the throat of a pulsed nozzle is used to generate a supersonic beam of carbon clusters. The neutral cluster beam is probed downstream by UV laser photoionization with time-of-flight mass analysis of the resulting photoions. Using graphite as the substrate, carbon clusters Cn fo…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Monte Carlo calculations of the herring-bone ordering phase transition of N 2 adsorbed on graphite have been performed for a variety of boundary conditions. The model consists of a rigid lattice of two-dimensional quadrupoles and for a small infinitely periodic system (PBC), a first-order phase transition is found, in…
Abstract The synthesis and the liquid‐crystal temperatures of sixty 4‐cyano‐2‐fluorophenyl and 4‐cyano‐3‐fluorophylen 4‐substituted benzoates are described. The nematic‐isotropic liquid transition temperatures of the most of these novel esters are only marginally lower than those of the corresponding esters containing…
For pt.I see ibid., vol.17, p.4705 (1984). The authors have measured the inelastic neutron scattering spectra of three samples of molten SrCl 2 with different isotopic chlorine compositions using the IN6 time-of-flight spectrometer at the Institut-Langevin in Grenoble. de Gennes narrowing of the quasielastic peak is o…
We demonstrate the feasibility of x-ray scattering studies of freely suspended strands of discotic liquid crystals (of triphenylene hexa-$n$-dodecanoate). We are able to grow strands, which are stable for days, of diameter > 50 \ensuremath{\mu}m with a few single-crystal domains. Unexpectedly, we find that the quas…
The Hall effect in ${\mathrm{NbSe}}_{3}$ has been measured in the magnetic field range 0-200 kG at temperatures of 20 and 30 K. At high magnetic fields the Hall coefficient is positive and the Hall voltage shows a strong dependence on electric field. As the electric field is increased from 0 to 80 mV/cm the Hall resis…
Effects on point-defect drift diffusion in the strain fields of straight edge or screw dislocations, due to anisotropic diffusion arising from the anisotropy of the point defect in its saddle-point configuration, are investigated. Expressions for sink strength and bias that include the saddle-point shape effect are de…
We present a nonperturbative theory of second-harmonic generation in reflection from a metallic grating. $p$-polarized light of frequency $\ensuremath{\omega}$ is assumed to be incident on the grating surface from the vacuum side, with the plane of incidence perpendicular to the grooves of the grating. We employ the m…
Fe 3,005 O 4 (magnetite naturelle recuite a 1373K) cristallise dans Fd3m avec a=8,3969 A, Z=8; affinement jusqu'a R=0,015• Fe 2,96 Mg 0,04 O 4 (magnetite naturelle recuite a 1073 K) cristallise dans Fd3m avec a=8,3975 A, Z=8; affinement jusqu'a R=0,014. Dans les deux cas, structure spinelle inverse ideale. Pas d'obser…