Materials Literature
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The size of gold nanoparticle aggregates was controlled by manipulating the interparticle interaction. To manipulate the interparticle interaction of gold nanoparticles prepared by citrate reduction, we applied the substitutive adsorption of benzyl mercaptan on the particle surface in the absence of the cross-linking…
The paper introduces a systematic procedure to coarse-grain atomistic models of the largest family of synthetic polymers into a mesoscopic model that is able to keep detailed information about chain stereosequences. The mesoscopic model consists of sequences of superatoms centered on methylene carbons of two different…
Phosphine-stabilized Au11 clusters in chloroform were reacted with glutathione (GSH) in water under a nitrogen atmosphere. The resulting Au:SG clusters exhibit an optical absorption spectrum similar to that of Au25(SG)18, which was isolated as one of the major products from chemically prepared Au:SG clusters (Negishi,…
Nanoparticle-based drug delivery systems have considerable potential for treatment of tuberculosis (TB). The important technological advantages of nanoparticles used as drug carriers are high stability, high carrier capacity, feasibility of incorporation of both hydrophilic and hydrophobic substances, and feasibility…
A new and highly efficient direct solvent, 1-allyl-3-methylimidazolium chloride (AMIMCl), has been used for the dissolution and regeneration of cellulose. The cellulose samples without any pretreatment were readily dissolved in AMIMCl. The regenerated cellulose materials prepared by coagulation in water exhibited a go…
The rheological characteristics of short Nylon-6 fiber reinforced styrene butadiene rubber (SBR) were studied using a capillary rheometer. The study was done with respect to the effect of shear rate, fiber concentration, and temperature on shear viscosity and die swell. All the melts showed pseudoplastic nature, which…
We extend previous studies of the dynamical relaxation in liquids consisting of particles interacting with the soft-sphere or inverse power potential, , where ε and σ set the energy and length scales, respectively, and n is the steepness or stiffness parameter. In previous work we have simulated these systems using mo…
The upper phase stability limit of Sr2FeMoO6 was determined in the temperature range 1140–1220°C using coulometric titration. At 1200°C, the decomposition oxygen partial pressure was determined to be 2.2×10−11atm O2. Hence at 1200°C, and for pO2’s in excess of this value, the phase is thermodynamically unstable. In or…
In the crystal structure of the polymeric title compound, (C2H8N)[Eu(C2O4)2(H2O)]·3H2O, the independent oxalate that lies on a general position chelates to two Eu atoms, as do the other two oxalates that lie on different centres of inversion, the bridging mode of the oxalates giving rise to a three-dimensional anionic…
The frequency and temperature dependence of real and imaginary parts of the dielectric constant (ε′, ε″), the phase shift (ϕ) and the ac-conductivity (σ) of polycrystalline complexes (β-CD)2·BaI7·11H2O and (β-CD)2·CdI7·15H2O (β-CD = β-cyclodextrin) has been investigated over the frequency and temperature ranges 0–100…
Reductive coupling of adventitious CO2 by CuI has afforded the title compound, μ-oxalato-1κ2O1,O2:2κ2O1′,O2′-bis[bis(1-benzyl-1H-pyrazole-κN2)(trifluoromethanesulfonato-κO)copper(II)], [Cu2(CF3O3S)2(C2O4)(C10H10N2)4], which contains centrosymmetric molecules in which the CuII ions, bridged by a planar oxalate lig…
Glass substrates modified with 3‐mercaptopropyltrimethoxysilane (MPS) were used to deposit CdS thin films in the process of successive ionic layer adsorption and reaction (SILAR). The films were characterized by X‐ray diffraction, optical absorption, and atomic force microscopy (AFM). AFM showed that the modified subs…
The crystallization of amorphous NiTi thin films was studied using in situ transmission electron microscopy (TEM) methods. Samples were subjected to heating conditions within the microscope and the microstructural development was monitored and recorded. The nucleation rate and the growth rate were determined experimen…
We have fabricated CoNiFeGa single crystals with excellent superelasticity. The superelastic strains of 4% and 6.7% in compression have been obtained along the [001] and [110] directions, respectively. These single crystals show strong anisotropy in strains, superelastic parameters, and even transformation path relate…
The structure and electronic properties of vanadium oxide nanotubes have been studied using optical, photoemission, and electron energy-loss spectroscopies. Electron diffraction indicates the tubular structure with an interlayer distance of about $26.1\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$. Photoemission spectrosc…
Theoretical and experimental studies on the two-photon photoemission excited by femtosecond laser pulses from the $sp$-band of Ag(111) in normal direction are reported. At low temperatures, the two-photon photoemission spectrum is found to consist mainly of nonresonant direct transitions from the lower to the upper $s…
Chemically modified biomaterial surfaces (titanium and glass) covered with polyelectrolyte self-assembled films formed by the alternating adsorption of cationic poly-L-lysine (PLL) and anionic poly-L-glutamic acid (PGA) were structurally characterized by atomic force microscopy. Complementary information concerning th…
The dielectric and electrical properties of a BaTi4O9 film were investigated in order to evaluate its potential use in metal-insulator-metal (MIM) capacitors for rf/mixed signal integrated circuits. A high capacitance density of 4.62fF∕μm2 along with a low tanδ of 0.0025 were obtained at 100 kHz. A high capacitance de…
Abstract We consider the influence of a local, or effective, composition on dynamics in the miscible polymer blend PEO/PMMA. Quasielastic neutron scattering in combination with deuterium labeling is employed to determine characteristic relaxation times of the PEO component over spatial scales from 3 to 10 Å. Informati…
The adsorption of atoms and molecules of several gases of the Si(100)2x1 silicon reconstructed surface is investigated by surface differential reflectance spectroscopy. This UV-visible optical spectroscopy makes possible the discrimination between two adsorption modes, depending on whether or not the adsorption leads…