Materials Literature
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Neodymium (Nd):Y 3 Al 5 O 12 (YAG) ceramics of excellent transparency have been fabricated by solid‐reactive sintering, using nanosized γ‐Al 2 O 3 and Y 2 O 3 powders as the starting materials. Reaction sequences and sintering behaviors of the powder mixture were characterized by X‐ray diffractometry and dilatometry.…
Abstract ZnO nanostructures have attracted great attention for possible applications in optoelectronic and spintronic devices. The electrical resistivity because of carriers can be improved by the introduction of Li ions, as Li is a possible dopant for achieving p‐type ZnO. We have carried out a comprehensive micro‐Ra…
Two state-of-the-art approaches based on the quasiparticle-Bethe-Salpeter equation (QP-BSE) and time-dependent density-functional theory (TDDFT) for different functionals are applied to calculate optical-absorption spectra of Si nanocrystallites passivated with hydrogen. All-electron wave functions are generated withi…
Abstract The article reported the flame‐retardant and the mechanical properties of expandable graphite (EG), an intumescent type, and decabrominated dipheny ethane (DBDPE), a gas‐phase type of flame‐retardant‐containing high‐density rigid polyurethane foams (RPUF) with a constant density of 0.5g/cm 3 . The results ind…
ZnO nanorods/Au nanocomposites with Au nanocrystals growing at tips of ZnO nanorods or located along the surface of the nanorods can be synthesized via a facile low-cost solution method. The number of Au nanoparticles grown on ZnO nanorods can be controlled by tuning the molar ratio of ZnO to HAuCl 4; thus, the ZnO/Au…
Abstract In this paper a review of studies on ternary polymer blends, reported in the period from 1980s to 2007, is presented. This review covers the investigations carried out on the formation of morphologies observed in ternary blends including separated disperse, core–shell and co‐continuous morphologies; and also…
We have studied the interplay of valley polarization and the Coulomb interaction on the energy spectrum, persistent current, and optical absorption of a graphene quantum ring. We show that the interaction has a dramatic effect on the nature of the ground state as a function of the magnetic flux and that the absence of…
Abstract With the aim of achieving ‘tailor‐made’ chitosan films, the effects of several variables on the properties of chitosan films were studied. These variables were chitosan concentration and molecular weight of thermally depolymerized chitosan, addition of lipids (palmitic acid, beeswax or carnauba wax) and plast…
Substrates for surface-enhanced Raman spectroscopy (SERS) have suffered from low enhancement, short shelf time, and poor uniformity or reproducibility. We report an effective method to produce SERS substrates that can potentially overcome these shortcomings. The SERS substrate consists of a layer of 100 nm Ag film dep…
Sowing the seeds: Binary colloidal particles of controlled morphology, including line segments, triangles, tetrahedra, octahedra, and square antiprisms (see picture) were obtained by an emulsion polymerization of styrene in the presence of silica seeds. These morphologies result from the minimization of an energy term…
Lithium aluminum hydride (LiAlH(4)) is a promising compound for hydrogen storage, with a high gravimetric and volumetric hydrogen density and a low decomposition temperature. Similar to other metastable hydrides, LiAlH(4) does not form by direct hydrogenation at reasonable hydrogen pressures; therefore, there is consi…
A novel and versatile Gemini-grafting strategy to modify surfaces/substrates is presented by a combination of conventional “grafting to” and “grafting from” strategies. As a typical example, carbon nanotubes (CNTs) were functionalized with amphiphilic/Janus polymer brushes by uniting click chemistry with a macroinitia…
Within the framework of the GGA+U implementation of density functional theory, we investigate atomistic and electronic structures of Au adsorbed on the stoichiometric and the defective CeO(2){111} surfaces, in the latter of which either O or Ce vacancies are presented. We show that on the stoichiometric surface, the m…
A series of new polyimides (PIs) containing tert -butyl side groups were synthesized via a polycondensation of 1,4-bis(4-aminophenoxy)-2,6-di- tert -butylbenzene ( 4 ) with various aromatic tetracarboxylic dianhydrides. The introduction of the asymmetric di- tert -butyl groups is an effective way to increase the inter…
A new synthetic method for polynuclear lanthanoid complexes that are embedded in molecular polyoxotungstates has afforded the highest nuclearity polyoxometalate-encapsulated Gd complex and the first decanuclear Yb complex of any sort to be structurally characterized.
The article presents a statistical rational model of damage for 2D disordered spring networks under a generic uniaxial loading. The validation is carried out by using the output from numerical simulations of compression and tension tests along the coordinate axes x and y. The findings demonstrate that the rational mod…
Poly(methyl methacrylate) (PMMA)/nanoclay composites with different filler fractions were prepared by a combined solution and melt mixing route. Three PMMA matrices of different molar masses but very similar polydispersities were used. Creep and creep-recovery experiments were performed in the linear and nonlinear reg…
Using N, N ′-dicyclohexylcarbodiimide (DCC) and l -serine as biologic additives, rutile TiO 2 hollow spheres assembled by nanorods can be synthesized by a simple hydrothermal reaction route. A distinctive crystallization and transformation route of the rutile TiO 2 hollow spheres has been proposed, which includes emer…
The magnitude and nature of interactions between small aromatic systems (benzene and naphthalene) and various single-wall carbon nanotubes are examined by MP2 theory. π−π stacking configurations are more strongly bound than CH---π analogues. There is a small preference for placement of the aromatic directly above a C═…
We discuss the phonon-assisted scattering of electrons by defects, i.e., the so-called Koshino-Taylor effect, in graphene. The two-dimensional character of graphene implies that the strength of the Koshino-Taylor effect can be considerably larger than in ordinary metals. We show that at finite temperatures the defect-…