Materials Literature
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The electrical conductivity of copper has been measured in the range of densities 0.3--3 g/${\mathrm{cm}}^{3}$ and in the temperature range from 8 000 to 30 000 K. Copper wires were vaporized in glass capillaries, and the conductivity measured in the 1-\ensuremath{\mu}s interval after vaporization began, and before th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigations of Graphitic Overlayers Formed from Methane Decomposition on Ru(0001) and Ru(11.hivin.20) Catalysts with Scanning Tunneling Microscopy and High-Resolution Electron Energy Loss SpectroscopyMing-Cheng Wu, Qiang Xu, and D. Wayne GoodmanCite this: J. Phys. Chem. 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Nodularins: A General Method for Structure AssignmentMichio Namikoshi, Byoung Wook Choi, Ryuichi Sakai, Furong Sun, Kenneth L. Rinehart, Wayne W. Carmichael, William R. Evans, Phillip Cruz, Murray H. G. Munro, and John W. BluntCite this: J. Org. Chem. 1994, 59, 9, 2349–2…
An analytic solution is derived for the magnetic field generated by current sources located in a piecewise homogeneous volume conductor. A linear discretization approach is used, whereby the surface potential is assumed to be a piecewise linear function over each tessellated surface defining the regions of differing c…
Crystal structures of principal ceramic material oxide ceramics nitride ceramics boride and carbide ceramics glass ceramics diffusion in ceramics mechanical properties of ceramics toughening mechanisms mechanical behaviour of cellular ceramics high temperature engineering ceramics ceramic superionic conductors ferroel…
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We describe a new algorithm for the generation of 3D grids for the numerical evaluation of multicenter molecular integrals in density functional theory. First, we use the nuclear weight functions method of Becke [A. D. Becke, J. Chem. Phys. 88, 2547 (1988)] to decompose a multicenter integral ∫F(r) dr into a sum of at…
In order to clarify the transport mechanism in fully protanated highly conductive polyaniline the origin and size of the electronic localization centers and barriers have to be determined. Dispersions of polyaniline in an insulating polymer have been studied by temperature-dependent broadband dielectric spectroscopy (…
Work functions and photothreshold values of various layered metal dichalcogenides ( ZrSe 2 , HfSe 2 , NbSe 2 , 1T-TaS 2 , 2H-TaS 2 , MoS 2 , MoSe 2 , α-MoTe 2 , SnS 2 , SnSe 2 ) have been measured by a photoemission technique. The measured photothreshold values, except for Sn compounds, are compared with the calculate…
An improved method is described for the sol–gel preparation of PLZT thin layers in the perovskite structure. The method uses a PbO cover coat. Details are reported for the sol‐gel processing route and heat‐treatment conditions. Through use of this method it is possible to prepare singlephase perovskite material with i…
Abstract Copolymers of L ‐lactide with D ‐lactide According to IUPAC the name dilactide is preferred to lactide. , glycolide IUPAC name: diglycolide. , ε‐caprolactone and trimethylene carbonate, and networks with spiro‐bis‐dimethylene‐carbonate (2,4,7,9‐tetraoxaspiro[5.5]undecane‐3,8‐dione) were prepared in bulk at st…
Cotton, linen, ramie, and viscose rayon fabrics along with a cotton / linen blend were hydrolyzed with cellulase from Trichoderma viride. Surface fibrils were eliminated by a 6 hour treatment in all cases. The loss of fibrillar matter appeared to be the primary cause of weight loss at this stage. On prolonged treatmen…
The validity of various homogeneous layer models for high-spatial-frequency rectangular-groove (binary) dielectric surface-relief gratings is examined for both nonconical and conical diffraction. In each model the grating is described by a slab of uniaxial material with its optic axis parallel to the grating vector. T…
The microstructure and preferred orientations of rapid thermally annealed Pb(Zr 0.53 ,Ti 0.47 )O 3 films, deposited on Pt/Ti/SiO 2 /Si electrode/substrates by solution‐gel spinning, have been investigated using analytical and high‐resolution electron microscopy and X‐ray diffraction. The temperature of pyrolysis of th…
Abstract Phase separation and gelation behaviors have been studied for the acid-catalyzed, alkoxide-based silica systems containing poly(ethylene oxide) (PEO) with an average molecular weight of 100000. Gels with micrometer range interconnected porous morphology were obtained similarly to the systems containing other…
Abstract A new approach for developing fundamental equations of oxygen permeation through thin mixed‐conducting oxide ceramic is presented considering both surface reactions on membrane‐gas interfaces and the diffusion of charged species in the bulk oxide. The essence of this work is the coupling of surface reactions…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of Polychromism of Cis Square-Planar Platinum(II) Complexes: Comparison of Two Forms of [Pt(2,2'-bpy)(Cl2]R. H. Herber, M. Croft, M. J. Coyer, B. Bilash, and A. SahinerCite this: Inorg. Chem. 1994, 33, 11, 2422–2426Publication Date (Print):May 1, 1994Publication Histo…
The dielectric properties of 〈100〉-oriented epitaxial ${\mathrm{SrTiO}}_{3}$ films as used in high-${\mathit{T}}_{\mathit{c}}$ heterostructures have been studied as a function of temperature and applied electric field by using in situ grown heterostructures (Mg/${\mathrm{SrTiO}}_{3}$/${\mathrm{SrTiO}}_{3}$:Nb and Au/$…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward Ligand-Driven Light-Induced Spin Changing. Influence of the Configuration of 4 Styrylpyridine (stpy) on the Magnetic Properties of FeII(stpy)4(NCS)2 Complexes. Crystal Structures of the Spin-Crossover Species Fe(trans-stpy)4(NCS)2 and of the High-Spin Species Fe(cis-s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiochemistry and Conformation of Poly(3-hexylthiophene) via the Synthesis and the Spectroscopic Characterization of the Model Configurational TriadsGiovanna Barbarella, Alessandro Bongini, and Massimo ZambianchiCite this: Macromolecules 1994, 27, 11, 3039–3045Publication D…