Materials Literature
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Careful studies on single decagonal quasicrystals show that the anisotropy of the Hall coefficient ${\mathit{R}}_{\mathit{H}}$ is quite universal for these structures. ${\mathit{R}}_{\mathit{H}}$ changes sign when the magnetic field rotates by 90\ifmmode^\circ\else\textdegree\fi{} from the tenfold axis. In both cases,…
<div class="htmlview paragraph">To measure the fuel vapor concentration in an unsteady evaporating spray injected into nitrogen atmosphere, the exciplex-forming method, which produces spectrally separated fluorescence from the liquid and vapor phase, was applied in this study. Two experiments were conducted to i…
CdS clusters in the quantized size regime (≈ 30 Å radius) have been synthesized in several media, including homogeneous organic solution, reverse micelles, and polymers (carboxymethylamylose). Particle size is controlled by the medium, but the photophysical properties of the clusters, as prepared, do not depend strong…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlexibility of a new thermoplastic polyimide studied with molecular simulationsRenshi Zhang and Wayne L. MatticeCite this: Macromolecules 1993, 26, 22, 6100–6105Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published inissue 1 October…
Powders of In 2 O 3 –Y 2 O 3 “dual stabilized”ZrO 2 (IYSZ) were prepared using sol‐gel procedures and tested for resistance to destabilization by molten NaVO 3 at 700° and 900°C. IYSZ powders with stabilizer oxide compositions ranging from 100% down to about 50% In 2 O 3 were superior to 100%‐Y 2 O 3 ‐stabilized ZrO 2…
Switching and memory storage thin films constructed from metallorganic charge‐transfer complexes, such as Cu + TCNQ − , can be prepared by reacting metals directly with organic acceptors in an acetonitrile solution. SEM and electrochemical methods were used to study the formation process of Cu + TCNQ − films on Cu sub…
Different nematic structures confined to a long cylindrical cavity with homeotropic surface anchoring are studied using a numerical minimization of the free energy of the uniaxial nematic liquid crystal. The stability of escaped radial structures and planar polar structures (with and without line defects) is analysed…
This article deals with the effects of fiber orientation and bending deformation on staple yarn behavior. First, the effect of fiber orientation is shown by comparing yarn properties determined using three different fiber orientation cases. Then, for a given fiber orientation distribution, radial distributions of both…
The structure of the type III variant of chloramphenicol acetyltransferase reveals that Thr-174, a conserved residue, is hydrogen-bonded to a bound water molecule (water 252). Modeling studies (P. C. E. Moody and A. G. W. Leslie, unpublished data) suggested that water 252 could play a part in transition state stabiliz…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCobalt complexes of octaethyloxophlorin. Metal-centered redox chemistry in the presence of a redox-active ligandAlan L. Balch, Marinella Mazzanti, and Marilyn M. OlmsteadCite this: Inorg. Chem. 1993, 32, 22, 4737–4744Publication Date (Print):October 1, 1993Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetection of nematic-smectic phase transition in a semiflexible main-chain liquid crystalline polymerS. D. Hudson, A. J. Lovinger, R. G. Larson, D. D. Davis, R. O. Garay, and K. FujishiroCite this: Macromolecules 1993, 26, 21, 5643–5650Publication Date (Print):October 1, 199…
We have studied the ferrielectric SmCγ* phase by means of laser beam diffraction and photon correlation spectroscopy. We found that the disordered structure and low frequency fluctuation characteristically distinguish SmCγ* from SmC and SmCA. These phenomena are qualitatively explained by the existing model structure,…
In order to understand the molecular mechanics involved in the adhesion of a bimaterial interface bond, a Raman microprobe shear apparatus has been designed and fabricated. The apparatus is fabricated to perform a pure shear experiment on a bimaterial interface produced by the vapor deposition of a thin film of ice on…
Different cold plasmas have been used to treat the surface of polyethylene terephtalate (PET) in order to improve the adhesion of alumina thin films deposited by RF sputtering. The influence of these treatments on the surface free energy of the polymer is shown by a study of wettability. ESCA analysis of the PET surfa…
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
Ladungstrennung durch Lichtanregung , Schneller Intrarotaxan‐Elektronentransfer über eine kurze Distanz, Verschiebung der beiden Rotaxanteile gegeneinander und langsamer Intrarotaxan‐Elektronentransfer über eine längere Distanz ‐das sind die Schritte, die den rechts schematisch gezeigten „molekularen Pendelbusverkehr”…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpiroconjugated intramolecular charge-transfer dyesPrzemyslaw Maslak and Anu ChopraCite this: J. Am. Chem. Soc. 1993, 115, 20, 9331–9332Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published inissue 1 October 1993https://pubs.acs.org/…
Abstract Spirobenzopyran units were bound to the side chains of poly ( L ‐glutamic acid) and partially methylated poly( L ‐glutamate)s. The modified polymers were found to exhibit “reverse photochromism” in hexafluoro‐2‐propanol (HFP), so the samples kept in the dark were characterized by an intense absorption band in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a (.mu.-oxo)(.mu.-carboxylato)dimanganese(III) polyimidazole complexKenneth J. Oberhausen, Robert J. O'Brien, John F. Richardson, Robert M. Buchanan, Raman Costa, Jean Marc Latour, Hui Lien Tsai, and David N. HendricksonCite this: Inorg. Che…
Abstract The long range orientational order of a liquid crystal is one of its prime characteristics. Before the extent of this order can be measured, however, it is necessary to define what is meant by the orientational order. This can be achieved in a variety of ways the most pragmatic of which is via the order param…