Materials Literature
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Reaping the benefit: A supramolecular light-harvesting antenna has been developed by encapsulating small amounts of a π-conjugated oligomer (molecular wire) within a self-assembled gel-forming donor scaffold. The supramolecular tapes of oligo(p-phenylenevinylene)s facilitate fast exciton migration and funneling of the…
We report the results of our first-principles investigation on the interaction of the nucleobases adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U) with graphene, carried out within the density-functional theory framework, with additional calculations utilizing Hartree-Fock plus second-order M\o{}lle…
Dual identity: It takes a single phenylene twist to reveal the dichotomous nature of a di-para-benzihexaphyrin (see picture; phenylene rings highlighted in red). This expanded porphyrinoid switches between Hückel and Möbius topologies in an unusual solvent- and temperature-dependent equilibrium. Each of the two incarn…
Nonemissive tetraphenylethene (TPE) 1 and its diphenylated derivative 2 were induced to emit intensely by aggregate formation. Crystalline aggregates of the dyes emitted bluer lights than their amorphous counterparts. The emissions of the TPE dyes could be switched off and on continuously and reversibly by wetting and…
Lean Duplex Stainless Steels (LDSS) have been used or are being considered as substitutes for several well-established materials, in various applications. This paper concentrates on AL 2003TM LDSS (UNS S32003) as a substitute for Type 316L stainless steel. Comparative data are presented including corrosion test data i…
Abstract Crystallographic superstructures in the deuterides CeCuSiD 1.64(5) and CeCuGeH 1.15(5) have been characterized by neutron diffraction. Deuterium atoms are inserted in [Ce 3 Cu] and [Ce 3 Si] or [Ce 3 Ge] tetrahedral sites available in the hexagonal ZrBeSi-related structure of these deuterides. A partial but o…
In porous media, the porosity introduces inhomogeneity in the bulk, which alters the mechanisms of leakage and breakdown exhibited by the dense analog. The presence of pores in solid dielectrics significantly degrades the electrical characteristics and breakdown strength of the material. Lanthanum doped BaTi0.6Zr0.4O3…
Cr vacancies, which have been thought to contribute to p -type conduction, are known to be abundant in MgCr 2 O 4 . However, no direct experimental evidence of the formation of Cr vacancies in MgCr 2 O 4 has been reported. In this work, changes in the valence band electronic structure related to Cr vacancy introductio…
Fluorine-doped tin oxide (FTO) thin film was coated on aluminosilicate glass at <TEX>$450^{\circ}C$</TEX> by spray pyrolysis method. In the range of 0-2.7 molar ratio of F/Sn, the variations of electrical conductivity and visible light transmission were investigated. At the F/Sn ratio of 1.765, the film showed the low…
X-ray diffraction imaging allows the investigation of a large area of a polycrystalline specimen in a single shot. Dynamic processes like recystallization can, therefore, be studied without prior knowledge of where they occur. Even early stages of nucleation can be traced back using the information from images taken f…
The effect of permanganate and phosphate anions on the corrosion of Cu-Zn alloys in NaCl solution has been studied using open circuit potential, potentiodynamic, and electrochemical impedance spectroscopy (EIS) techniques. The addition of increasing concentrations of permanganate and phosphate anions decreases the cor…
Pendry et al. [J. B. Pendry, A. J. Holden, D. J. Robbins, and W. J. Stewart, IEEE Trans. Microwave Theory Tech. 47, 2075 (1999)] and Smith et al. [D. R. Smith, W. J. Padilla, D. C. Vier, S. C. Nemat-Nasser, and S. Schultz, Phys. Rev. Lett. 84, 4184 (2000)] have shown that the effective magnetic permeability, μ, of fre…
Properties of dilute solutions of polystyrene and styrene-acrylic acid copolymers in DMF and ethyl acetate were studied in the temperature range 20–35°C. It was shown that the dependences of the intrinsic viscosity and Huggins constants on temperature for the copolymers differ from that for polystyrene. Comparison of…
In the early 1980's, British experience in the manufacture of mixed-oxide fast reactor fuel was used to develop a new thermal MOX manufacturing route called the Short Binder-less Route (SBR). Laboratory- scale development led to the manufacture of commercial PWR fuel in a small pilot plant, and the construction of the…
Poly(ethylene:vinyl acetate) (pEVA) and polyether urethane-urea (PEUU) are widely used i.a. as materials for electric cable insulation, hence they contain various flame-retardants for this purpose. Two flame-retardant filled pEVA samples are compared with PEUU sample without flame-retardant. Thermal effects accompanyi…
Electrospinning was usually applied to form randomly oriented ultra fine fibers. This paper has demonstrated that an annulus fiber mat was received and the spinning jet can be affected by an insulating tube. Different tube diameters, different tube heights and different heights between nozzle and the target were chose…
The hopping conductivity and magnetoresistance of fullerene C2N samples treated under high pressure at high temperatures were studied in detail. It was revealed that an increase in the synthesis temperature in the range 800 < T syn < 1000°C under a pressure p syn = 8 GPa induces a metal-insulator transition in fullere…
Abstract A new class of polymer composites has been developed for flame retardancy and passive fire protection. The key feature is a controlled transition from a degrading polymer composite to a ceramic residue in a fire situation. The polymer can be thermoplastic, thermoset or elastomeric. The composites are processa…
Following analysis of typical age hardenable martensitic stainless steels, a new kind of maragingstainless was developed. The new maraging stainless steel showed high strength, ultimate tensilestrength (UTS) 5 1670 MPa, high toughness, K IC 5 83·9 MPa m1/2 and hardness as high as 478 HVin the age hardened condition. M…
The Fuel Conditioning Facility (FCF) at the Idaho National Laboratory (INL) treats spent nuclear fuel using an electrometallurgical process that separates the uranium from the fission products, sodium thermal bond, and cladding materials. Material accountancy is necessary at FCF for two reasons: 1) it provides a mecha…