Materials Literature
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A series of Fe2YSi (Y = Cr, Mn, Fe, Co, Ni) alloys were synthesized and their electronic and magnetic properties were studied both theoretically and experimentally. In particular, a novel Heusler alloy Fe2CrSi single phase was synthesized by means of the melt-spinning method. First principles FLAPW calculations were p…
We report a multilayer solution-processed blue light-emitting diode based on colloidal core/shell CdS/ZnS nanocrystal quantum dots (QDs). At a low-operating voltage of 5.5 V, the device emits spectrally pure blue radiation at 460 nm with a narrow full-width-at-half-maximum bandwidth of 20 nm and high brightness up to…
ZnO is attracting considerable attention for its possible application to light-emitting sources due to its advantages over GaN. We review the recent progress in the growth of ZnO epitaxial films, doping control, device fabrication processes including etching and ohmic contact formation, and finally the prospects for f…
The fluorescence and motional dynamics of single diamond nanocrystals in buffer solution and in living cells is investigated. Stable hydrosols of nanodiamonds in buffer solutions are investigated by fluorescence correlation spectroscopy. Measurement of the effective hydrodynamic radius yields particles of 48 nm diamet…
Electronic structure calculations are presented for ${\mathrm{Cu}}_{2\ensuremath{-}x}\mathrm{S}$ using the full-potential linearized muffin-tin orbital method. In the simple cubic antifluorite structure, ${\mathrm{Cu}}_{2}\mathrm{S}$ is found to be semimetallic both in the local density approximation (LDA) and using t…
A simple optical method is presented for identifying and measuring the effective optical properties of nanometer-thick, graphene-based materials, based on the use of substrates consisting of a thin dielectric layer on silicon. High contrast between the graphene-based materials and the substrate is obtained by choosing…
This feature article highlights the recent developments in the field of squaraine chemistry. Attempts have been made to address the relevance of squaraine dyes as a class of functional organic materials useful for electronic and photonic applications. Due to the synthetic access of a variety of squaraine dyes with str…
The machining performance of porous NiTi shape memory alloys prepared using powder metallurgical production technique has been investigated experimentally in the grinding operation. Grinding force ratio, specific grinding energy, surface characteristics were detected. The result reveals that, much difference of grindi…
The mixing required for post-mould gelatinisation of syntactic foams using starch as binder was studied. It was found that starch particles tend to adhere to hollow microspheres during mixing, forming agglomerates. A transition in the buoyancy of microsphere-starch phases was found at a particular volume fraction of s…
We have suggested ultrafine particle coating processes for preparing nanocrystalline particle coated alpha-alumina powders by a carbonate precipitation and thermal-assisted combustion route, which is environmentally friendly. The nanometric ammonium aluminum carbonate hydroxide (AACH) as a precursor for coating of alu…
Functionally graded materials (FGMs) are multi-component composites with a gradual change in composition and/or structure. ZrO2-Ni FGMs in the form of a bonding interlayer with thicknesses in the range 40–100 μm were capable of joining dense ZrO2 pieces (a) or ZrO2 to Ni specimens (b). The number of composition steps…
Cloaking devices designed using the coordinate transform approach were shown to be realizable, at least in principle, within the realm of electromagnetic metamaterials. In this paper we investigate the strictness of conditions imposed on the parameters of metamaterial cloaks by calculating the degree of wave scatterin…
Manganese(II) 9-molybdocobaltate(III) of the composition [Mn(H 2 O) 4 ] · [CoMo 9 O 27 (OH) 5 ] · 7H 2 O ( I ) has been synthesized for the first time and investigated using X-ray diffraction and thermal gravimetric analyses. Compound I crystallizes in the trigonal system with the following unit cell parameters: a = 1…
By using a focused laser beam, a silver-oxide thin film can be transformed into silver nanoparticles: these form an attractive material for surface-enhanced Raman scattering (SERS). The shape of the nanoparticles was shown to be controllable through changing the thickness of the film, and optimization of the film thic…
Biddulphia rhombus var. atlantica was erected by Frenguelli from waters of the South Atlantic Ocean. A revision of its syntype series was carried out with light microscopy, a lectotype was chosen and compared with the lectotype of Odontella rhomboides (= Zygoceros rhombus), and with the lectotype of Odontella rhombus…
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Dehydration of the LiI · 3H 2 O crystal hydrate in vacuum has been investigated at 20–25°C. The decomposition of the LiI · 3H 2 O crystal hydrate in vacuum proceeds to monohydrate. During heating of lithium iodide monohydrate, evolution of water vapor is observed at 30–100 and 100–170°C. Above 200°C, evolution of mole…
The multicomponent refractory oxide system Zn2(TiaSnb)1 − x ZrxO4 (a + b = 1; a: b = 1: 5, 1: 4, 1: 3, 1: 2, 1: 1, 1: 0, 2: 1, 3: 1, 4: 1; x = 0−1.0; Δx = 0.05) has been studied by x-ray diffraction, using samples prepared by melting appropriate oxide mixtures in a low-temperature hydrogen-oxygen plasma. Two phases, b…
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Focal conics consisting of an ellipse and a hyperbola in chiral smectic C liquid crystals aligned in surface‐stabilized cells of medium thickness (about 25 µm cell gap) were characterized in relation to the chevron structure by synchrotron X‐ray microdiffraction. The focal conic texture is embedded in the chevron stru…