Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly[(aryloxy)phosphazenes] with phenylphenoxy and related bulky side groups: synthesis, thermal transition behavior, and optical propertiesHarry R. Allcock, Michael N. Mang, Alexa A. Dembek, and Kenneth J. WynneCite this: Macromolecules 1989, 22, 11, 4179–4190Publication Da…
How does a light/current switch function at the molecular level? The title compounds could contribute to a deeper understanding. Visible light transforms 1 into 2. Both 1 as well as 2 are electron-transfer active. Since 2 is reduced electrochemically far more readily than 1, photochemically modulated current pulses ar…
The formation of hydroxyl (OH) and the subsequent production of water in the reaction of hydrogen gas with adsorbed atomic oxygen on Pt(111) at low temperatures (130⩽T⩽165 K) and pressures (2×10−10⩽PH2⩽1×10−9 Torr) have been studied using time-resolved electron energy loss spectroscopy (TREELS). The time evolution of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethane oxidation over Pt on .gamma.-alumina: kinetics and structure sensitivityK. OttoCite this: Langmuir 1989, 5, 6, 1364–1369Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 November 1989https://pubs.acs.org/doi/10…
Abstract A series of 9 new chiral and crosslinkable liquid‐crystalline copolymers were synthesized and transformed into liquid‐crystalline elastomers by crosslinking using a hydrosilylation reaction. Both the soluble copolymers and the elastomers show cholesteric, smectic A and chiral smectic C * phases, which are not…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusual structural distortions induced by charge-transfer interactions through conjugated molecules: crystal structures of NH2(C6H4)(C.tplbond.C)n(C6H4)NO2 (n = 0-3)Eva M. Graham, Vincent M. Miskowski, Joseph W. Perry, Daniel R. Coulter, A. E. Stiegman, William P. Schaefer,…
The adsorption of NO on Ag(111) at 80 K has been studied by high resolution electron energy loss spectroscopy (HREELS) and thermal desorption spectroscopy (TDS). At low exposures (≤0.05 L) NO is adsorbed in part dissociatively and in part molecularly in two different threefold bridge states (in upright and bent or til…
Abstract In the mathematical formalism of quantitative AES and XPS, the elastic electron collisions are not taken into account. However, recent calculations have shown that the neglect of the elastic collisions may result in considerable errors. Theoretical analysis of the actual electron transport in a solid requires…
An electron beam (e-beam) measurement and inspection technique for x-ray masks using a conductive organic layer has been developed. This technique consists of spin coating of a conductive organic layer, scanning e-beam probe, detecting the backscattered and secondary electron signals, and removing the conductive layer…
Abstract The photoinduced and thermal cis/trans isomerization of the title compound adsorbed on silica gel has been studied by the immersion method. The cis/trans photoisomerization of the adsorbed state can be reversibly induced by irradiation. Thermal isomerization of the cis-to trans-isomer proceeds very fast on th…
Abstract A theoretical framework is provided for generalizing the inferences drawn from the results of earlier experimental studies of kinetics of crystallization in oriented poly(ethylene terephthalate). The framework is obtained by combining extensions of classical nucleation theories in polymers 3,4 and a theory of…
Abstract The discharge reaction of FeOCl was investigated and the discharge products were identified by XRD and EPMA. Lithium and solvent co-intercalate into FeOCl during the early stage of the discharge, in the low lithium concentration range in the FeOCl solid matrix (LixFeOCl, x<0.6). Such compounds are stab…
The lower halides of zinc, namely, ZnCl 2 , ZnBr 2 , and ZnI 2 , may act as network formers in glasses that also contain modifying alkali halides such as KCI, KBr, KI, NaI, or CsI. Compositions which contain only Br − or I − anions are of particular interest because of their extended infrared transmission, which inclu…
Rigorous simulation of electromagnetic scattering from wafer topography has been achieved using the massively parallel Connection Machine CM-2. The program, based on a finite-difference time domain algorithm, can be applied to key structures in lithography and alignment with interpenetrating, isolated, or nonperiodic…
Abstract The dynamic storage modulus of uncured silica-filled silicone rubber increases sharply when a critical filler loading is reached. A similar behavior has been observed for the conductivity in the same compounds. The experimental data fit a percolation law fairly well, and microscopy confirms the formation of a…
A "polymerization-crosslinking" treatment to impart durable press properties to cotton fabric has been investigated, using N-methylolacrylamide as a polymerizing resin and dimethyloldihydroxyethyleneurea (DMDHEU) and urea formaldehyde as crosslinkers. Nonconventional treatment techniques such as "wet fixation" and "st…
It is shown that heat flow is severely decreased in transient phenomena, due to nonlocal effects. The case of phonon transport in a steep temperature gradient is discussed in detail for semiconductors. Fixed end temperatures and an initial heat pulse propagating in a homogeneous sample are considered as boundary condi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonomer concentration effects on the kinetics and mechanism of the boron trichloride catalyzed solution polymerization of hexachlorocyclotriphosphazeneMarie Kayser Potts, Gary L. Hagnauer, Michael S. Sennett, and Geoffrey DaviesCite this: Macromolecules 1989, 22, 11, 4235–42…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControl of nitrogen oxide (NOx) emissions by selective catalytic reduction with hydrogen over hydrophobic catalystsL. Fu and Karl T. ChuangCite this: Energy Fuels 1989, 3, 6, 740–743Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Publis…
Abstract An analysis of crystal binding and structural phase transition is presented using an analytical potential form for the overlap repulsive energy derived by Harrison from quantum mechanical considerations. The potential model is applied to calculate the cohesive energies, bulk modulus, and its pressure derivati…