Materials Literature
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On the basis of a realistic model for the spectral conductivity, obtained from a proper combination of tunneling spectroscopy [R. Escudero et al., J. Phys.: Condens. Matter 11, 383 (1999)] and transport measurements, we derive a closed analytical expression for the Seebeck coefficient, satisfactorily describing its te…
The EPR test, designed to examine of the susceptibility to nonuniform, primarily intergranular corrosion, ranks among the more successful testing technique developments relating to stainless steels and alloys. One of its numerous advantages is that it lends itself to non-destructive, on-site examination. EPR enjoyed w…
Optimum parameters in the thermomechanical treatment during grain boundary engineering (GBE) were investigated for improvement of intergranular corrosion resistance of type 304 austenitic stainless steel. The grain boundary character distribution (GBCD) was examined by orientation imaging microscopy (OIM). The intergr…
Abstract New paraphenylene diamine antioxidants were prepared. The efficiency and permanence of these oligomer‐bound paraphenylene diamines were compared with those of conventional amine‐type antioxidants in elastomer blends such as natural rubber/styrene–butadiene rubber and natural rubber/polybutadiene rubber. These…
The two-dimensional molecular conductor β'-Et 2 Me 2 P[Pd(dmit) 2 ] 2 is a Mott insulator under ambient pressure and exhibits a metallic state accompanied by the superconductivity with applying pressure. And, in the higher pressure region, another non-metallic behavior appears. X-ray single-crystal structure analyses…
Owing to their superior mechanical and physical properties, cCarbon nanotubes (CNTs) seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. HOWEVER, In most of the experimental results to date, however, only modest improvements in the strength and stiffness have…
The vibration nu(SH) has never been observed in the surface-enhanced Raman scattering of mercaptoacetic acid recorded in a wide range of pH. This behavior enables us to deduce that the -SH group is deprotonated and links to the metal forming an Ag-S bond as 1-alkanethiols do. On the contrary, the carboxylic or carboxy…
Cerium doped ZnAl2O4 cathodoluminescent films have been deposited by ultrasonic spray pyrolysis deposition technique. X-ray diffraction measurements on these layers have shown that their crystalline structure depends on the substrate temperature. Cerium ions have been introduced into zinc aluminate films for produce v…
A series of hyperbranched poly( ε -caprolactone)s (HPCLs) with molecular architectural variation, which refers to the different lengths of the linear backbone segments consisting of 5, 10, and 20 ε -caprolactone monomer units (thereby referred to as HPCL-5, HPCL-10, and HPCL-20, respectively) and the different numbers…
Due to their total spin polarization (∼100%), the half-metallic oxides, such as La0.7Sr0.3MnO3 (LSMO), CrO2, Fe3O4 and Sr2FeMoO6, are promising materials for producing very high magneto-resistive (MR) responses in magnetic devices. Extremely large MR values have been obtained by tunneling through vertical tunnel junct…
The phase behavior of polystyrene- block -poly( n -pentyl methacrylate) copolymers [PS−PnPMA] having various block length ratios was investigated by rheology, transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS). All of the PS−PnPMA exhibited two transitions: the lower disorder-to-order tran…
The bis-phenyltin-substituted, lone-pair-containing tungstoarsenate [(C(6)H(5)Sn)(2)As(2)W(19)O(67)(H(2)O)](8)(-) (1) has been synthesized and characterized by multinuclear NMR, IR, and elemental analysis. Single-crystal X-ray analysis was carried out on (NH(4))(7)Na[(C(6)H(5)Sn)(2)As(2)W(19)O(67)(H(2)O)].17.5H(2)O (N…
Numerical simulations have been carried out to determine the mechanical property of single crystal copper nanowire subjected to tension using the molecular dynamics method. The mechanism of deformation, strength and fracture are elucidated based on these numerical simulations. No strengthening is found after yielding…
Photoinduced processes have been determined in a [2]catenane containing a zinc(II) porphyrin, a gold(III) porphyrin, and two free phenanthroline binding sites, Zn-Au(+), and in the corresponding copper(I) phenanthroline complex, Zn-Cu(+)-Au(+). In acetonitrile solution Zn-Au(+) is present in two different conformation…
We have performed transition state searches on the potential energy landscape for bulk and freestanding film polymer glasses and identified connected minima. An analysis of the displacements between minima shows that the sites that undergo the greatest displacement are highly localized in space for both the bulk and t…
Conventional strain-based mechanics theory does not account for contributions from strain gradients. Failure to include the strain gradient contributions can lead to underestimates of stresses and size-dependent behaviors in small-scaled structure [1]. This paper focus on the structural size effects on torsion of cyli…
A new microporous phase Na 2 Nb 2 O 6 ·H 2 O, which transforms to NaNbO 3 perovskite on heating, has been synthesized by the hydrothermal method. Rietveld analysis of powder synchrotron X-ray diffraction data reveals that the structure comprises a framework of [NbO 6 ] and [NaO 6 ] octahedra with other Na + being loca…
Abstract Mechanical properties of poly(lactic acid) (PLA) blended with a small amount of dendritic hyperbranched polymer (DHP) were investigated. Effects of DHP and starch on mechanical properties of PLA were compared. DHP significantly improved tensile strength and elongation at break of PLA. A small amount of starch…
We have carried out an ab initio computational study of SiC nanoparticles with diameters between 1 and 3 nm. Our calculations show that surface composition and termination play a dominant role in determining the optical gaps and thermodynamic stability of these nanoparticles. In particular, we find that the optical ga…
The electronic structure of Ni(3)(dpa)(4)Cl(2) (1) has been investigated within the framework of the density functional theory (DFT), using two types of exchange-correlation functionals and various basis sets. The "broken-symmetry" approach proposed by Noodleman for the characterization of electronic states displaying…