Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A series of zeolite-type silicates containing framework lanthanides and termed Ln-AV-9 have been synthesized. Fundamentally different from conventional zeolites, these materials have the composition (Na4K2)(Ln2Si16O38)·10H2O (Ln = Nd, Sm, Eu, Tb, Gd, Dy). 29Si and 23Na MAS NMR spectra of Sm-AV-9 indicate the presence…
The effects of carbon and nitrogen on the creep strength and microstructure of precipitation-strengthened 15Cr ferritic steel have been investigated. The creep rupture lives of 15Cr ferritic steel with the addition of 0.07mass%N and with a combination of 0.05mass%C and 0.03mass%N were extended longer than that of the…
Article Chemical Degradation of Cellulose in Paper over 500 Years was published on September 1, 2005 in the journal Restaurator. International Journal for the Preservation of Library and Archival Material (volume 26, issue 3).
The characteristics of a new-type of ozone-generating electrode with a catalyst layer fabricated by thermal decomposition were investigated. The catalyst layer consisted of insulating tantalum oxide and metallic platinum. Ozone generation was observed when the concentration of Ta of the catalyst layer was 70% and abov…
EBSP (electron backscattering pattern) analysis was performed on microstructure of three β titanium alloy specimens after cold working to study peculiar plastic behavior of the multifunctional alloy, Gum Metal. The specimens employed were Ti-36%Nb-2%Ta-3%Zr-0.3%O (mass%) alloy (Gum Metal) and two reference alloys havi…
Evidence of a relationship between activation energies and enthalpy changes of various dissociation reactions on transition metals has been reported recently. A reconsideration of density functional theory results for dissociation energies of oxygen and NO on different rhodium surfaces (low-index and stepped) and thei…
A liquid crystal (LC) anamorphic lens is realized using an LC cell with a transparent electrode and a divided electrode with a hole in the center. By applying appropriate potentials on the divided electrode, the LC cell behaves like an optical lens with astigmatic properties. An incident plane lightwave experiences a…
Alkyl monolayer modified porous silicon functional surfaces are employed for selective binding of proteins from complex mixtures (through washing of the deposited mixture spot using appropriate buffer) and MALDI-MS is used to detect the components retained on the surface.
Abstract Density functional calculations at the B3LYP/6‐31G* level were performed for perylene tetracarboxylic dianhydride (PTCDA) and its potential derivatives modified by replacing the two anhydride ether groups with B‐, N‐, S‐, and Se‐containing groups, as well as for perylene monomer and dimer structures. The pred…
Polyimides are commonly used as a thermally stable insulator for semiconductors. To assure adequate chemical or physical properties, a layer of their precursors has to be cured in a convection oven at more than 300 °C. In this paper, we compare variable frequency microwave (VFM) heating with convection heating for cur…
We present a comparative theoretical study of AlN fullerenes with BN and C fullerenes using both the Hartree–Fock and density functional theories. The smallest (AlN)12 cage is proved to be energetically more favorable than its monoring and graphitic sheet isomers. This structure is expected to be reasonably stable, on…
Derivatives of amino acids bearing a porphyrin moiety on a side chain were synthesized by coupling a porphyrin to a glutamic acid side chain; the utility of these compounds was demonstrated by their use in solid-phase synthesis of a peptide bearing a cationic porphyrin and by studying its DNA-binding properties.
Bulk BaTiO 3 ceramics with 〈111〉‐texture have been prepared by the modified templated grain growth method, using platelike Ba 6 Ti 17 O 40 particles as templates, and the mechanism of texture development is examined. The Ba 6 Ti 17 O 40 particles induce the abnormal growth of BaTiO 3 grains, and a structure similarity…
A chemical route, called direct condensation method (DCM), was developed to synthesize nanometric Pb 2 Ru 2 O 6.5 as a cathode material for intermediate temperature solid oxide fuel cells. The electrolyte used was ( Er 2 O 3 ) 0.2 ( Bi 2 O 3 ) 0.8 (ESB). Porous lead ruthenate and ESB-lead ruthenate composite electrode…
A biomimetic approach of composition and natural function of natural moisturizing factor (NMF) with the amino acid content of silk fibroin was advantageously used to reconstruct the skin moisturizing system. The isolation of silk hydrolysate with water and sodium chloride treatment was complete in one hour. Lithium io…
The defect pyrochlore (H3O)SbTeO6 oxide is an excellent proton conductor, showing a conductivity value of 10(-1) S cm(-1) at 30 degrees C under saturated water vapor partial pressure. It can be prepared by ion exchange from KTeSbO6 pyrochlore in sulfuric acid at 453 K for 12 h. The full characterization of the structu…
Nine organotin fluorocarboxylates RnSnO2CRf (n = 3, R = Bu, Rf = CF3, C2F5, C3F7, C7F15; R = Et, Rf = CF3, C2F5; R = Me, Rf = C2F5; n = 2, R = Me, Rf = CF3) have been synthesized; key examples have been used to deposit fluorine-doped SnO2 thin films by atmospheric pressure chemical vapour deposition. Et3SnO2CC2F5, in…
rently investigated for making controlled drug delivery devices. In spite of the large number of investigations dealing with LA/GA polymers which have been reported in the literature, only little is known about the degradation mechanism of these polyesters in solid state. In this study poly(L,D-lactide-co-glycolide) 5…
A novel organic tubular structure with the walls consisting of aromatic rings was constructed by the self-assembly of a two-dimensional sheet-like molecule in the solid state.
Several synthetic techniques for metal-free phthalocyanines (Pc) and d- and f-metal phthalocyaninates (“PcM”) starting from different precursors (phthalonitrile, urea and phthalic anhydride, phthalimide, phthalic acid, etc.) are reviewed. Conventional methods are presented, as well as some less well-known techniques s…