Materials Literature
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It is given to information on methods dynamic calculation hydraulic systems, is offered conclusion to dynamic model of the hydraulic battery with pneumatic spring and its brought three-dementional acerbity.
There are given the research results on creogen treatment of hard alloy chisels and drills. The change of physico-mechanical characteristics of hard alloys and encreasing of firmness of cutting-tools after creogen treatment are determined.
Different kinetic models like the Avrami, Tobin and Urbanovici-Segal models have been applied for determining the isothermal crystallization kinetics of virgin poly(ethylene terephthalate) (PET) and PET/poly(methyl methacrylate) (PMMA) blends. The different compositions investigated were PET90/PMMA10, PET75/PMMA25 and…
The addition of dodecanethiol to a solution of oleylamine-stabilized gold nanoparticles in chloroform leads to aggregation of nanoparticles and formation of colloidal crystals. Based on results from dynamic light scattering and scanning electron microscopy we identify three different growth mechanisms: direct nanopart…
Treatment of GeCl2(dioxane) with Li2(TPP)(OEt2)2 (TPP = tetraphenylporphyrin) in THF yields Ge(TPP), the first free Ge(II) porphyrin complex. In pyridine Ge(TPP) is converted to Ge(TPP)(py)2, an antiaromatic Ge(IV) complex, whereas in benzene the reaction is reversed, and pyridine dissociates from Ge(TPP)(py)2 to form…
A model of the effective electrical conductivity for carbon nanotube (CNT) composites is presented by incorporating the interface effect with an average field theory. The dependence of the effective electrical conductivity on CNT length, diameter, concentration, and interface properties has been taken care of simultan…
Abstract Moisture transmission through textiles has a great influence on the thermo-physiological comfort of the human body which is maintained by perspiring both in vapour and liquid form. The clothing to be worn should allow this perspiration to be transferred to the atmosphere in order to maintaining the thermal ba…
X-ray crystallography of collagen model peptides has provided high-resolution structures of the basic triple-helical conformation and its water-mediated hydration network. Vibrational spectroscopy provides a useful bridge for transferring the structural information from X-ray diffraction to collagen in its native envi…
We investigate the DFT + U approach as a viable solution to describe the low-lying states of ligated and unligated iron heme complexes. Besides their central role in organometallic chemistry, these compounds represent a paradigmatic case where LDA, GGA, and common hybrid functionals fail to reproduce the experimental…
A conjugated donor-acceptor array composed of two phthalocyanines connected to the bay region of a perylenediimide is assembled by using palladium chemistry. Excitation of the phthalocyanine produces a nanosecond lived charge-separated state.
Recently, it was reported that the alkaline niobate‐based (K,Na,Li)(Nb,Ta,Sb)O 3 (LF4) perovskite ceramics showed excellent piezoelectric properties and have been regarded as a new candidate of lead‐free piezoelectric materials. However, the effects of additives on the piezoelectric property of LF4 have not been studi…
A theory of electron states for graphene nanoribbons with a smoothly varying width is developed. It is demonstrated that the standard adiabatic approximation allowing to neglect the mixing of different standing waves is more restrictive for the massless Dirac fermions in graphene than for the conventional electron gas…
YVO 4:Eu 3+ -based phosphors in three series with compositions (Y 1 - x Eu x )(V 1 - z P z )O 4, (Y 0.95 - y Gd y Eu 0.05 )(V 0.4 P 0.6 )O 4 and (Y 0.95 - y Eu 0.05 Gd y )(V 1 - z P z )O 4 were synthesized and investigated as potential red-emitting phosphors for a plasma display panel (PDP). The optimal substitution p…
Collagen-based animal glues are widely used in the conservation of artefacts, serving as adhesives, binders and consolidants for organic and inorganic materials. With a variety of different animal glues on the market, such as hide and bone glues, fish glues, isinglass and gelatin, their individual properties need to b…
The incorporation of nitrogen impurities in the anatase TiO 2 (101) surface is investigated by first principles density functional theory calculations. Several substitutional and interstitial configurations and different concentrations for the N impurities in the surface and subsurface layers are considered, as well a…
Crystal-field (CF) levels below 36 000 cm −1 of Eu 3+ at the C 2 site of Gd 2 O 3 nanorods are experimentally determined from the excitation and emission spectra at 10 K. The levels are analysed in terms of 20 freely varied free-ion and CF parameters, and energy-level fit yields a final standard deviation of 12.9 cm −…
In this review, we describe the contribution of peptides to the biomedical applications of metallic nanoparticles. We also discuss strategies for the preparation of peptide-nanoparticle conjugates and the synthesis of the peptides and metallic nanoparticles. An overview of the techniques used for the characterization…
In this paper, we present a detailed investigation of exchange-dominated nonpropagating spin-wave modes in a series of 100-nm Ga1-xMnxAs films with Mn concentrations x ranging from 0.02 to 0.08. The angular and Mn concentration dependences of spin-wave resonance (SWR) modes have been studied for both as-grown and anne…
The anomalous Hall effect in a magnetic two-dimensional electron gas with Rashba spin-orbit coupling is studied within the Kubo-Streda formalism in the presence of pointlike potential impurities. We find that all contributions to the anomalous Hall conductivity vanish to leading order in disorder strength when both ch…
We report results of 11B NMR and susceptibility measurements on the quasi 2D frustrated dimer spin system SrCu2(BO3)2 under high pressure. At 2.4 GPa and in a magnetic field of 7 T, NMR lines split with decreasing temperature in two steps. A gradual splitting below T=30 K breaking the four-fold symmetry of magnetic re…