Materials Literature
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Due to the peculiar nature of the atomic order in quasicrystals, examining phase transitions in this class of materials is of particular interest. Energetic particle irradiation can provide a way to modify the structure locally in a quasicrystal. To examine irradiation-induced phase transitions in quasicrystals on the…
We developed a solution synthetic route to Bi2Se3 layered nanostructures through weakening the reactivity of precursors in a hot-injection process. Oleylamine (OYA) and its content in precursor solutions determined reliable synthesis and tunable thickness of Bi2Se3 layered nanostructures. The Raman shift of the out-of…
This work presents the benefits of the superlattice approach to control light emission properties of materials with Si nanoclusters and rare-earth ions. The undoped and Nd3+-doped both Si-rich-SiO2 single layers and Si-rich-SiO2/SiO2 superlattices were grown by radio frequency magnetron sputtering. Their properties we…
The authors present the blue-shift of Raman 2D and G peak of a single layer graphene film, which is fabricated via chemical vapor deposition, on the relatively even Cu foil domain with nearly uniform thickness. This can be interpreted that rather mechanically compressive strain is exerted between graphene and the even…
This article presents a relatively simple analytical model aimed at simulating high-speed penetration into composite materials targets. The model is based on a set of basic hypotheses common to other previous analytical models developed in our department and elsewhere. However, this new model is of a more refined natu…
Abstract The effect of experimental parameters on carbon accumulation in the Ni/YSZ anode of SOFC operated at 1,073 K with CH 4 , has been described in this paper. Experimental parameters including sealing of the cell to the cell holder, operating current, surface coverage by current collector paste on the surface of…
The transfer of Fragilaria javanica Hustedt to the genus Fragilariforma D.M. Williams & Round is presented based on a detailed analysis of the type material from Java (Malay Archipelago) using light and scanning electron microscopy. The taxon is characterized by each areola covered externally with a rota, well-develop…
Abstract A series of aminoazobenzene derivatives structurally related to AzoAMP‐1 have been prepared and characterized by using a variety of analytical techniques. AzoAMP‐1 is based on 2,2′‐diaminoazobenzene with N ‐methylpyridine groups. The new derivatives all contain a hydrogen bond between the aniline hydrogen ato…
Thermally activated shape memory polymers (SMPs) recover from a secondary shape induced by mechanical deformation to a primary equilibrium shape when they are heated to their actuation temperature. In certain applications, for example in the biomedical field, it may be necessary to control the rate of shape recovery u…
A porous‐dense dual‐layer composite membrane reactor was proposed. The dual‐layer composite membrane composed of dense 0.5 wt % Nb 2 O 5 ‐doped SrCo 0.8 Fe 0.2 O 3‐δ (SCFNb) layer and porous Ba 0.3 Sr 0.7 Fe 0.9 Mo 0.1 O 3‐δ (BSFM) layer was prepared. The stability of SCFNb membrane reactor was improved significantly…
Stimulating stuff: The synthesis and optical activities of several metal oxide nanoparticles introduced in the helical pores of chiral mesoporous silica supports are reported (see figure). Both coloured and colourless metal oxides exhibited the Cotton effect at their characteristic absorption bands, attributed to elec…
Amplified spontaneous emission (ASE) is observed, under optical pump, in polystyrene films doped with two pentathienoacene derivatives functionalised with thienyl‐S,S‐dioxide groups (compounds 2 and 3 ). The effect of the dioxide groups on the ASE properties is analysed by comparing the performance with that of its co…
The solubility of cefradine form I in five pure solvents from (283.15 to 308.15) K was experimentally determined by using an equilibrium method. It was found that the solubility of cefradine form I in all tested solvents increased with the increase of temperature. Four thermodynamic models were used to correlate the e…
Pseudoenantiomeric ethynylhelicene oligomers containing a disulfide group formed two-component gels, which showed different solvent properties from gels without the disulfide group. The disulfide gels reacted with gold nanoparticles, and the resulting organic-inorganic composite materials exhibited fluorescence emissi…
In order to study the effect of orifice angle of vortex tube on yarn forming in jet vortex spinning, eight levels of nozzle angle are designed, from 40° to 65°, and the corresponding three-dimensional computational fluid dynamics (CFD) models are established to conduct the numerical simulation of the airflow in the no…
The aim of this study is to evaluate many parameters in intermingling process and to determine the effects of these parameters on yarn properties statistically. For this purpose, POY (partially oriented polyester yarn) filaments, which have 283 dtex linear density and four different filament numbers (34, 47, 68, 100)…
Three unconventional dendrimers that contained rigid NH-triazine linkages and peripheral tert-butyl moieties were prepared by using a convergent approach and characterized by (1)H and (13)C NMR spectroscopy, mass spectrometry, and elemental analysis. Based on a thermogravimetric analysis study, these dendrimers were o…
The crystal structures of double perovskites SrLa M RuO 6 ( M = Zn and Mg) have been studied using X-ray and neutron diffraction data. Both compounds have monoclinic structure at room temperature with space group P 2 1 / n . A first-order structural phase transition P 2 1 / n → R {\overline 3} has been observed in SrL…
This paper describes our investigation of the effects of forced air plasma treatment on polypropylene and polyethylene. The morphology of the treated surfaces has been carefully examined using a variety of tools including optical profiling. The complex surface morphology was observed to change with increasing treatmen…
Hydrogels were prepared from bovine and porcine gelatin powders of different Bloom values. Gelatin concentration and pH were selected to obtain self-supporting gels with stiffness in the range of those employed in structural applications in foodstuff, ballistic and pharmacy. Glycerol and sorbitol were also added in ge…