Materials Literature
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One of the novel multidimensional charge-transfer (CT) chromophores, 2-[4-(4,5-di(4-nitrophenyl)imidazolyl)phenyl]-4,5-di(4-aminophenyl)imidazole (DNPIPDAPI), was designed and synthesized; the polyimide was formed with it and 2,5-bis(4-aminophenyl)-3,4-diphenylthiophene (TPTDA) (BMI). The thermal and temporal stabilit…
In recent times antiferroelectric thin-film material compositions have been identified as one of the most significant thin films for development of devices such as high charge storage, charge couplers/decouplers, and high strain microelectromechanical systems. Thus, understanding the dielectric and electrical properti…
We have studied equilibrium phase behavior and nonequilibrium particle aggregation in a mixture of charged colloids and ionic wormlike micelles. At high enough concentration of micelles but below the overlap concentration ( c *), separation into coexisting colloidal gas and liquid phases occurred. Beyond c *, we obser…
We report thickness shear mode resonator acoustic wave data for films of regioregular poly(3-hexylthiophene) films exposed to acetonitrile solutions of LiClO4. Both the current- and acoustic wave-responses to constant (or slowly swept) potential show different regimes, whose characteristics, which are quite different…
There are two types of electron configurations, (d(xy))(2)(d(xz), d(yz))(3) and (d(xz), d(yz))(4)(d(xy))(1), in low-spin iron(III) porphyrin complexes. To reveal the solvent effects on the ground-state electron configurations, we have examined the (13)C- and (1)H-NMR spectra of low-spin dicyano[meso-tetrakis(2,4,6-tri…
1 Structure.- 2 Mechanical Properties of Coatings.- 3 Physical Properties of Coatings.- 4 Investigation of Protective Properties.- 5 Determination of Bond Strength Between a Coating and Base Metal.- 6 Wear Resistance of Coated Materials.- 7 Fatigue Failure of the Base Metal-Coating Composition.- 8 Breaking Strength an…
Abstract The interaction of a polycrystalline silver powder with ozone (5 mol.% O 3 in O 2 ) was investigated over the temperature range 300–923 K. Silver powder samples were reacted with ozone for 30 min at specified temperatures in this range. All experiments were performed at atmospheric pressure. Following treatme…
Multistep magnetic switching with single, double, and triple loops has been observed in single-crystal (001) ${\mathrm{Co}}_{2}\mathrm{MnGe}$ Heusler alloy films epitaxially grown on GaAs (001) substrates due to a combined magnetic anisotropy consisting of cubic magnetocrystalline anisotropy and uniaxial anisotropy. T…
Linear alkylbenzenes (LAB) are typically manufactured by the alkylation of benzene and α-olefin, employing HF or AlCl 3 as catalyst. LAB are the precursors of linear alkylbenzene sulphonates (LABS) used in a variety of industries. Various acid catalysts are being explored by different researchers, and zeolites are cla…
Mesostructured aluminosilicate intercalates belonging to the new class of solid acids known as porous clay heterostructures (PCH) have been prepared by the postsynthesis grafting of aluminum into the mesostructured intragallery silica framework of a PCH precursor derived from a synthetic saponite clay. Elemental analy…
Self-assembly of [Cu(tetren)]2+ (tetren = tetraethylenepentamine) and [W(CN)8]3- in acidic aqueous solution yields the double-layered square grid cyanide-bridged polymer of ((tetrenH5)0.8CuII4[Wv(CN)8](4).7.2H2O)n with Cu(II) centres of square pyramidal geometry coordinatively saturated solely by CN bridges supplied b…
A combinatorial approach was developed for the synthesis and the screening of a large variety of conjugated polymers. The parallel synthesis of 96 polyaryleneethynylene derivatives was performed on a 12 x 8 format from diethynyl and dibromoaryl building blocks, via a palladium-catalyzed carbon-carbon coupling reaction…
We investigate the temperature-pressure phase diagram of BaTiO_3 using a first-principles effective-Hamiltonian approach. We find that the zero-point motion of the ions affects the form of the phase diagram dramatically. Specifically, when the zero-point fluctuations are included in the calculations, all the polar (te…
Cobalt nanoparticles encapsulated in carbon shells have been synthesized by catalytic chemical vapor deposition (CCVD) in high yield by reducing with a H 2 /CH 4 gas mixture a Mg 0.9 Co 0.1 O solid solution impregnated MgO (SSI−MgO) catalyst. The carbon-encapsulated Co nanoparticles have a narrow distribution of diame…
The dynamic processes in the surface layers of metals subjected activity of a pulsing laser irradiation, which destroyed not the crystalline structure in details surveyed. The procedure of calculation of a dislocation density generated in bulk of metal during the relaxation processes and at repeated pulse laser action…
The work functions (WF's) of single-walled carbon nanotubes and bundles are studied using first-principles methods. For individual metallic tubes, the WF is independent of the chirality and increase slightly with tube diameter. For semiconducting tubes, the WF (as defined by the HOMO energy) decreases rapidly. The WF…
Single-wall carbon nanohorn (SWNH) aggregates can be produced by CO 2 laser vaporization of carbon, and a single aggregate can take either a “dahlia-like” or “bud-like” form. We found that “dahlia-like” SWNH aggregates were produced with a yield of 95% when Ar at 760 Torr was used as the buffer gas, while “bud-like” S…
The structure, polarization, and zone-center phonons of bulk tetragonal BaTiO$_3$ under compressive epitaxial stress are calculated using density functional theory within the local density approximation. The polarization, computed using the Berry-phase formalism, increases with increasing tetragonality and is found to…
The crystal growth behaviour of solid phase halides encapsulated within single walled carbon nanotubes (SWNTs) is reviewed. As SWNTs form atomically thin channels within a restricted diameter range, their internal van der Waals surfaces regulate the growth behaviour of encapsulated materials in a very precise fashion.…
A microfluidic procedure for the controlled production of cadmium sulfide nanoparticles is described.