Materials Literature
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The corrosion fatigue performance of a superduplex stainless steel in two different chloride-bearing solutions (30g∕l and 60g∕lNaCl) is explored in the present paper. Fatigue life results and surface damage analysis show a strong influence of the applied strain amplitude, as well as of the chloride content, on the cyc…
Textured thermoelectric [Ca 2 CoO 3 ] 0.62 [CoO 2 ] (denoted as CCO) ceramic was fabricated and distributions of crystallographic orientations for local grains and misorientation angles between grains were investigated by electron backscatter diffraction pattern analysis. Most of the grains are preferentially aligned…
We investigated the magnetism in Ca and Sr pnictides by using the first-principles calculations. These compounds are half-metallic and ferromagnetic (FM) when they assume the zinc-blende structure at the equilibrium lattice constant. Ferromagnetism is induced by the spin polarization of the p -orbitals of the pnictoge…
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This article reviews high‐quality epitaxial film growth of layered cobalt oxides by reactive solid‐phase epitaxy (R‐SPE) with topotactic ion‐exchange methods. Epitaxial film of Na 0.8 CoO 2 was grown on a (0001)‐oriented α‐Al 2 O 3 substrate by R‐SPE using CoO film as the starting material. The Na 0.8 CoO 2 epitaxial…
The gradual vitrification evolution of atom mixing and local atomic pairing structure of the binary Zr-Ni alloy during severe deformation at room temperature is traced numerically by molecular dynamic simulation. It is found that the icosahedra clusters will gradually develop with the increasing of disorder environmen…
Abstract A novel inherently conducting polymer, high‐quality polyphenanthrene (PPh) films were synthesized electrochemically by direct anodic oxidation of phenanthrene (Ph) in boron trifluoride diethyl etherate (BFEE) containing a certain amount of trifluoroacetic acid (TFA). The oxidation potential of Ph in this medi…
The behavior of gold crystal under uniaxial, tensile, and three different triaxial stresses is studied using an ab initio constant pressure technique within a generalized gradient approximation. Gold undergoes a phase transformation from the face-centered-cubic structure (fcc) to a body-centered-tetragonal (bct) struc…
In this study, a continuum isotropic plastic damage evolution model has been derived in the framework of internal variable theory of thermodynamics. A new dissipation potential function has been suggested as a basis for developing the high-order damage evolution model based on continuum damage mechanics (CDM) theory.…
The pressure dependence of the magnetic transitions in the giant magnetocaloric materials ${\mathrm{Gd}}_{5}{({\mathrm{Si}}_{x}{\mathrm{Ge}}_{1\ensuremath{-}x})}_{4}$ $(x=0.125,0.5)$ has been investigated using x-ray magnetic circular dichroism (XMCD) measurements in a diamond anvil cell (DAC). We found that the most…
Citrate synthase is an archetypal carbon-carbon bond forming enzyme. It promotes the conversion of oxaloacetate (OAA) to citrate by catalyzing the deprotonation (enolization) of acetyl-CoA, followed by nucleophilic attack of the enolate form of this substrate on OAA to form a citryl-CoA intermediate and subsequent hyd…
Rotlichtaktivitäten: Die beschriebenen photoaktivierbaren DNAs können durch Licht wählbarer Wellenlänge aktiviert werden. Dies gelingt auch mit rotem Licht, das deutlich weniger schädlich als UV-Licht ist und überdies tief in Gewebe eindringt (siehe Schema).
We investigate the optical properties of one-dimensional (1D) dimerized Mott insulators using the 1D dimerized extended Hubbard model. Numerical calculations and a perturbative analysis from the decoupled-dimer limit clarify that there are three relevant classes of charge-transfer (CT) states generated by photoexcitat…
Abstract In this work, Fe 3 O 4 /polystyrene/poly( N ‐isopropylacryl amide‐ co ‐methylacrylate acid) (Fe 3 O 4 /PS/P(NIPAAM‐ co ‐MAA)) magnetic composite latex was synthesized by the method of two stage emulsion polymerization. In this reaction system, 2,2′‐azobis(2‐methyl propionamidine) dihydrochloride (AIBA) was us…
Abstract Phosphorus incorporated tetrahedral amorphous carbon (ta‐C:P) films are prepared by filtered cathodic vacuum arc technology with phosphine as the dopant. The influence of phosphorus doping level and acid pretreatment on the electrochemical properties of ta‐C:P electrodes is investigated by cyclic voltammetry,…
A belt-shaped hexagonal cyclic porphyrin array 2 that comprises of six meso-meso, beta-beta, beta-beta triply linked diporphyrins 3 bridged by 1,3-phenylene spacers is prepared by oxidation from cyclic dodecameric array 1 consisting of six meso-meso directly linked diporphyrins 4 with DDQ and Sc(OTf)3. The absorption…
Based on the superelasticity of shape memory alloy (SMA), a superelastic SMA damper is designed, and its analytical model has been established and verified by experimental results. Numerical simulation is carried out to investigate the effects of the damper's parameters on its behaviors, such as groove depth, SMA wire…
We report the synthesis and low‐temperature electrical resistivity, Seebeck coefficient, and thermal conductivity of the binary type I clathrate K 8 Ge 44 □ 2 (□=Ge framework vacancy). Electrical resistivity measurements indicated metallic or heavily doped semiconductor behavior, while the Seebeck was relatively high…
We report herein on Ruddlesden–Popper‐type doped Sr n +1 Ti n O 3 n +1 ( n =2) as a potential candidate for n ‐type thermoelectric (TE) oxides. The TE properties of 5 at.% La‐, Nd‐, and Nb‐doped Sr 3 Ti 2 O 7 polycrystalline ceramics were investigated and the origin of Seebeck coefficient was discussed from the viewpo…
We report static and dynamic light-scattering measurements of aqueous glucose solutions near their glass transition. Photon correlation spectroscopy reveals two relaxation processes present in the supercooled liquid: a nonexponential and nonhydrodynamic, alpha -relaxation occurring at short times and an exponential an…