Materials Literature
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A remarkable nonanuclear copper(II) complex, , with the composition [Cu9(L)4(micro3-OH)4(MeOH)2](ClO4)2, in which L is a pentadentate trianionic Schiff-base ligand with N2O3 donor atoms, has been characterized by analytical, structural and magnetochemical methods. The structure consists of four dinuclear [Cu2L]+ units…
Nd-Fe-B sintered magnets have high energy products and are used for various applications. Motors of hybrid vehicles (HEVs) are one of the major applications. For usage of HEVs, Dy is added to Nd-Fe-B magnets to maintain coercivity at high temperature environment. However, due to low natural resources of Dy, Dy-free or…
The main aim of the present investigation is to see how various relaxation processes including the chair-chair transformation (as found by earlier researchers at room temperature in mechanical relaxation spectroscopy) in cyclohexane derivatives evolve as the temperature is lowered. For this purpose, four remarkable (t…
Zn pyro-pheophorbide a and fulleronicotine form in nonpolar solvents a supramolecular self-assembled electron donor-acceptor dyad, which performs fast photoinduced charge separation (0.5 ps) and slow recombination (>1 ns) as evidenced by photochemical studies.
Abstract Plasmonic materials are emerging as key platforms for applications that rely on the manipulation of light at small length scales. Sub-wavelength metallic features support surface plasmons that can induce huge local electromagnetic fields at the metal surface, facilitating a host of extraordinary optical pheno…
A simple and general procedure is described for the development of fluorescence resonance energy transfer (FRET) systems by the co-immobilization in a sol-gel matrix of photoluminescent quantum dots with a given dye "acceptor".
New diazaphospholidine POSS macromolecules have been synthesised and tested in styrene and vinyl acetate hydroformylation. Whilst some of them have shown activity, others precipitated upon mixing with the rhodium precursor preventing its efficient use. Molecular dynamics has been used to help understand these observat…
The adhesion between cobalt salt-containing rubber compounds and brass-plated steel cords was studied to understand the role of cobalt salt as an adhesion promoter. An improvement in adhesion was shown with the low loading of cobalt salt in the range 0.5–1 phr, while a significant decline in adhesion was observed with…
Remarkable changes of properties result from systematically varying the surface functionality of polyamide dendrimers within a single generation.
In order to make clear the air flow in the yarn duct, which has the maximum effect on the generation of interlaced yarns, the flow near to the yarn duct wall and the jet issuing from a circular air jet nozzle were measured in basic type interlacers with various diameters and lengths of yarn duct. The jet issuing from…
A non-linear least-squares curve-fitting procedure is proposed to analyze three-omega voltage data from a fine wire in a gas sample using the three-omega method. The method uses both three-omega components of the voltage arising from a sinusoidal heating current to determine the thermal conductivity of the surrounding…
Density functional theory calculations (DFT) were performed for the spin-crossover system [Fe(btpa)]2+ (btpa = N,N,N',N'-tetrakis(2-pyridylmethyl)-6,6'-bis(aminomethyl)-2,2'-bipyridine), and for the predominantly low-spin [Fe(b(bdpa))]2+ complex (in the solid state) (b(bdpa) = N,N'-bis(benzyl)-N,N'-bis(2-pyridylmethyl…
Phase transitions in Pb(Zn1/3Nb2/3)O3-PbTiO3 were investigated by means of the dielectric constant measurement under the zero-field heating after field cooling. A sharp phase transition between ferroelectric phases in Pb(Zn1/3Nb2/3)O3 was confirmed to appear at 114°C, and to connect to the morphotropic phase boundary…
Thermoelectric properties of La-doped SrTiO3 were investigated in order to determine the optimum sintering temperature for its fabrication by using a combination of combustion synthesis and spark plasma sintering. Combustion-synthesized samples (Sr1−xLaxTiO3, x=0.08) were subjected to spark plasma sintering at tempera…
Microporous poly(vinylidene fluoride) (PVDF) membranes with dense or porous surface were prepared by immersion precipitation of PVDF/TEP solutions in coagulation baths containing different amounts of water. Onto the membrane surface, poly(glycidyl methacrylate) (PGMA) was grafted by plasma-induced free radical polymer…
Static tensile tests, dynamic mechanical analysis as well as electron microscopy were used to characterize the macromechanical properties of MWNT-filled polycarbonate composites. Meanwhile the behavior of the nanotube/polymer interfaces was examined by changing nanotube contents and measuring electrical conductivity a…
The synthesis, structural characterization, spectroscopic, magnetic, electrochemical and thermal properties of a methoxo-bridged dinuclear iron(III) inclusion compound [Fe2(m-xba)2(μ-OCH3)2]·CH2Cl2 (1) derived from m-xylylenebis(acetylacetone) H2(m-xba) are reported. In 1, the symmetry related two distorted octahedral…
A synthetic route for obtaining a porphyrin-fullerene dyad with a constrained geometry forcing the [60]fullerene sphere to lie on the porphyrin plane is reported, revealing a strong interaction in the ground state between the two chromophores.
This research work investigated the corrosion resistance of nickel-plated medium carbon steel and 18/8 stainless steel in cassava fluid (i.e. containing hydrogen cyanide). It simulated the effect of continuous use of the materials in a cyanide environment where corrosion products are left in place. Low carbon steel sa…
In recent years, scatterometry has become one of the most commonly used methods for CD metrology. With decreasing structure size for future technology nodes, the search for optimized scatterometry measurement configurations gets more important to exploit maximum sensitivity. As widespread industrial scatterometry tool…