Materials Literature
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Chalcopyritelike quaternary chalcogenides, Cu2ZnSnQ4 (Q=S,Se), were investigated as an alternative class of wide-band-gap p-type thermoelectric materials. Their distorted diamondlike structure and quaternary compositions are beneficial to lowering lattice thermal conductivities. Meanwhile, partial substitution of Cu f…
Cellulose nanoreinforcements have been used to improve mechanical and barrier properties of biopolymers, whose performance is usually poor when compared to those of synthetic polymers. Nanocomposite edible films have been developed by adding cellulose nanofibers (CNF) in different concentrations (up to 36 g/100 g) as…
Abstract Recent years have seen increasing interest in the construction of nanoscopically layered materials involving aqueous‐based sequential assembly of polymers on solid substrates. In the booming research area of layer‐by‐layer (LbL) assembly of oppositely charged polymers, self‐assembly driven by hydrogen bond fo…
The authors proposed a simple model for the lattice thermal conductivity of graphene in the framework of Klemens approximation. The Gruneisen parameters were introduced separately for the longitudinal and transverse phonon branches through averaging over phonon modes obtained from the first principles. The calculation…
Stable and rigid carbon atomic chains were experimentally realized by removing carbon atoms row by row from graphene through the controlled energetic electron irradiation inside a transmission electron microscope. The observed structural dynamics of carbon atomic chains such as formation, migration, and breakage were…
Magnetic Heusler alloys which undergo a martensitic transition display interesting functional properties. In the present review, we survey the magnetocaloric effects of Ni-Mn-based Heusler alloys and discuss their relation with the magnetic shape-memory and magnetic superelasticity reported in these materials. We show…
We report the rational synthesis of nitrogen-doped zinc oxide (ZnO:N) nanowire arrays, and their implementation as photoanodes in photoelectrochemical (PEC) cells for hydrogen generation from water splitting. Dense and vertically aligned ZnO nanowires were first prepared from a hydrothermal method, followed by anneali…
A simple physical conception explaining the experimentally observed temperature dependence of the local mode frequencies in the ordering metal hydrides is proposed. Calculations are performed for bcc vanadium deuterides. The model can be applied to other physical phenomena which are related to the hydrogen motion in m…
Abstract Silicon nanocrystals with excellent red luminescence properties are prepared by applying controlled chemical etching, which is promising as a high-volume manufacturing technique in the future.
Abstract Zn was introduced to La1−xSrxScO3−δ as a B-site dopant. The addition of Zn markedly improved the sinterability of the material, and a dense sinter could be synthesized by a solid-state reaction method. Although conductivity was slightly decreased by the addition of Zn, it was shown that La1−xSrxSc1−yZnyO3−δ i…
The effect of nanoclay content on the properties of glass fibre reinforced, waterborne epoxy laminates is investigated. Fourteen ply nanocomposite laminates containing 0, 0·1, 0·2, 0·5, 1 and 2 wt-% cloisite Na + nanoclay are fabricated by a hot press. The interlaminar shear strength, flexural strength and flexural st…
Abstract ZnO nanoparticles (NPs), prepared by an improved alco-sol method at relatively low temperature using oleic acid (OA) as a stabilizing agent, were added to a liquid crystal matrix of 4′-pentyl-4-biphenylcarbonitrile (5CB). Addition of ZnO NPs not only decreased the threshold voltage but also had a dramatic eff…
The atomic structure and elastic properties of Y-silicon nanowire junctions of fork- and bough-types were theoretically studied and effective Young modulus were calculated using the Tersoff interatomic potential. In the final stages of bending, new bonds between different parts of the Y-shaped wires are formed. It was…
The land-sourced pollutants including industry wastewater and sewage bring to the coast zone sea pollution. The pollutants in the seawater can aggravate or reduce the corrosion of the steel. Among them the ammonia nitrogen is an important factor. In this paper the effect of the ammonia nitrogen on corrosion in 3.5% Na…
We demonstrate that the temperature-dependent phase behaviors of parallel and perpendicular cylinder-forming block copolymers are governed by domain-domain segregation forces inherently present in block copolymer material itself. With increasing temperature, a parallel cylinder-forming block copolymer experienced a pa…
Abstract In this study, Ce‐rich coating is investigated as corrosion inhibitor of carbon fibers reinforcement aluminum matrix (Cf/Al) composites. The coatings are obtained by immersion in aqueous solution containing Ce(NO 3 ) 3 onto composite surface, whereas the Ce‐rich coating process produces a coating with highly…
Nd 25 Fe 40 Co 20 Al 10 B 5 was prepared by high-energy milling and melt-spinning techniques. The as-milled and as-quenched samples were subsequently annealed in a temperature range from 400to1100°C for 20min. For the annealed samples, x-ray diffraction combined with high-resolution transmission microscopy show the pr…
The formation of crystallographically oriented and current line oriented pores in n-type InP is reviewed and compared to other semiconductors in the light of some new results. A model for the formation of crystallographically oriented pores is presented that reproduced salient features of this pore type rather well. I…
Nanocomposites were prepared by the inclusion of layered silicates into the aramid matrix via a solution intercalation technique. Polyamide was synthesized by reacting 4,4'-oxydianiline with isophthaloyl chloride and then end-capping with carbonyl chloride end groups using excess diacid chloride. The compatibility bet…
High efficiency and valuable energy distributed generation could be achieved with the coupling of solid oxide fuel cells and biomass processing technologies. This coupling would take advantage of the high operating temperature of the fuel cell and the efficient recovery of its waste high temperature irreversible heat…