Materials Literature
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Abstract One hundred years ago, Edison succeeded in preparing carbon fibers for his incandescent lamp bulb by thermal decomposition of natural polymeric fibers. Ten years ago, progress reports about “Novel Forms of Carbon” predicted outstanding properties and promising new applications for the carbonization products o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoemission studies of electron localization at very low excess energiesH. Neff, J. K. Sass, H. J. Lewerenz, and H. IbachCite this: J. Phys. Chem. 1980, 84, 10, 1135–1139Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 M…
A novel recording process for the formation of phase volume holograms at up to 1500 cycles/mm is described. The term silver halide (sensitized) gelatin or SHG denotes an all-gelatin phase material, which records the initial image information through photon absorption by the silver halide. Our process uses a reversal b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and physical properties of hexakis(isothiocyanato)technetate(III) and -(IV) complexes. Structure of the [Tc(NCS)6]3- ionH. S. Trop, A. Davison, A. G. Jones, M. A. Davis, D. J. Szalda, and S. J. LippardCite this: Inorg. Chem. 1980, 19, 5, 1105–1110Publication Date (…
A new design technique for multilayer reflectors is presented It is useful when slight absorption by one or both of the coating materials limits the performance of the reflector. The basic procedure is to add layers to a given substrate or multilayer system one pair at a time. The thickness of each layer is chosen to…
Abstract Coating of polyethylene (PE), poly(vinyl fluoride) (PVF), poly(tetrafluoroethylene) (PTFE), and poly(vinyl chloride) (PVC) films with flow discharge‐polymerized acetylene was investigated. The influence of glow discharge experimental conditions on the nature of the coated layer, the films' wettability, surfac…
The extended muffin tin orbitals technique was applied to study electronic properties of polyethylene (PE), polytetrafluoroethylene (PTFE), and polyacetylene (PA). The computed optical gap is 9 and 6.2 eV, respectively, for PE and PTFE whereas it is 1.2 to 1.7 eV for PA depending on the isomeric forms. Three dimension…
Gas phase x-ray photoelectron spectra of some transition metal acetylacetonates, M(AcAc)2, (M=Co,Ni,Cu) are reported. The metal 2p, 3s, and 3p core levels and the O 1s and C 1s binding energies have been obtained. Satellites were observed to higher binding energies from the metal 2p, 3s, and 3p levels and the O 1s lev…
The evolution of the electron emission of impregnated cathodes has been measured over many thousands of hours of operation at various temperatures in diodes and traveling-wave tubes. Certain physical methods were used to investigate the correlation between these results and the mechanisms of cathode operation: X-ray f…
Glass-ceramics which have played an ever increasing role in science and technology in the last two decades are the most widely used representative of a new type of partly crystalline or semi-amorphous materials. They can be prepared by induced crystallization of glass-forming melts. Part 1 (which appeared in the prece…
Abstract Graft copolymerization of methyl methacrylate (MMA) was carried out on both defatted and bleached jute fibers using ceric ammonium sulfate (CAS) as the initiator. In order to obtain the optimum condition for grafting, the effects of initiator concentrations, temperature, time of reaction, lignin content of ju…
Finite element (FE) numerical simulation was employed for studying the influence of geometrical factors on the rate of leveling of a triangular surface profile during anodic dissolution in ECM at constant interelectrode gap under conditions of primary current distribution. Theoretical results were verified experimenta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnion-induced fluorescence quenching of aromatic moleculesHaruo Shizuka, Makoto Nakamura, and Toshifumi MoritaCite this: J. Phys. Chem. 1980, 84, 9, 989–994Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 May 1980https://p…
The polarized absorption and fluorescence spectra of 0.01–5% Np3+ doped into single-crystal LaCl3 were measured at moderate and high resolution in the range to 50 000 cm−1 at 298, 77, and 4 K. The 150 crystal field components identified were fit by a parametrized model which has previously been shown to provide an exc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spin resonance studies of some ruthenium(III) complexesO. K. Medhi and U. AgarwalaCite this: Inorg. Chem. 1980, 19, 5, 1381–1384Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 May 1980https://pubs.acs.org/doi/10.…
The abilities of plasma and serum to support the growth of vascular smooth muscle cells maintained on uncoated tissue culture dishes or dishes coated with an extracellular matrix (ECM) have been compared. Vascular smooth muscle cells maintained on plastic dishes and exposed to plasma proliferate poorly; when exposed t…
A free-energy expression (differing in its symmetry from that of McMillan) is proposed for describing charge-density-wave (CDW) states in transition-metal dichalcogenides having trigonal-prismatically coordinated layers (e.g., 2H-Ta${\mathrm{Se}}_{2}$). An analysis of the single CDW state is given. In disagreement wit…
The reacton of hydrogen with hydroxyl-free vitreous silica has been measured for temperatures between 500 and 850 °C, pressures between 0.132 and 5.78 atm, and sample thicknesses between 0.057 and 1.06 cm. The results can be explained by a simple model often used to explain tarnishing reactions. This model assumes tha…
The electrical properties of (MxV1–x)2O3 (M = A1, Cr, Fe, Ga, Rh, Ti) have been investigated. Only Al- and Cr-doped V2O3 exhibit electrical transitions close to room temperature. X-ray diffraction shows that no critical lattice parameter can be identified to correlate with the occurrence or absence of this transition.…
Abstract The band structure of Mg x Zn 1‐x Te alloys is studied using a double beam wavelength modulated system in first derivative mode. Modulated reflectivity measurements are made from 82 to 300 K within spectral range 2500 to 5400 Å. Structures corresponding to the E 0 , E 0 + Δ 0 , E 1 , E 1 + Δ 1 , e 1 and e 1 +…