Materials Literature
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The effect of surfaces on the stability of smectic-${C}^{*}$ $(\mathrm{Sm}{C}^{*})$ variant phases is investigated. The results obtained using dielectric spectroscopy by varying the cell thickness show that the temperature ranges of $\mathrm{Sm}{C}_{\ensuremath{\alpha}}^{*}$, $\mathrm{Sm}{C}_{A}^{*}(1∕2)$, and $\mathr…
We investigated the influence of ZrO2on the microstructure and electromagnetic properties of MnZn ferrites by characterizing fracture surface micrographs, magnetic properties, and dc resistivity. Powders of Mn0.68Zn0.25Fe2.07O4composition were prepared by the conventional ceramic technique. Toroidal cores were sintere…
Synthesis of gold-palladium bimetallic nanoparticles using in situ radioactivity from (198)Au isotope is reported in this paper. Gold solution spiked with (198)Au(III) has been mixed with PdCl2 solution in measured proportions in 50% polyethylene glycol solution. Au(III) and Pd(II) are reduced, and nanoparticles are f…
We explore the extreme quantum limit of photogenerated electrons in quantum paraelectric SrTiO3. This regime is distinct from conventional semiconductors, due to the large electron effective mass and large dielectric constant. At low temperature, the magnetoresistance and Hall resistivity saturate at a high magnetic f…
Silver telluride nanowires incorporating silver were prepared by green chemical method in aqueous solution. First, Ag 2 TeO 3 was prepared from aqueous solutions of sodium tellurite (Na 2 TeO 3 ) and silver nitrate (AgNO 3 ). At room temperature in basic solution, α- d -glucose reduces Ag 2 TeO 3 to generate silver na…
A one-step, low-cost, and general nanocrystal self-assembly method that covers both the nanometer-scale superlattice and macroscale ordered patterns—that is, hierarchical architectures—is developed. This approach can generate various functional, compositional, and dimensional combinatorial architectures. It may give n…
Azobenzene-based photoswitchable compounds can be use to photocontrol a variety of biochemical systems. In some cases, their effectiveness may be limited by the size of the conformational change that the switch undergoes. To produce an azobenzene photoswitch that undergoes a large end-to-end distance change upon isome…
Three perylene tetracarboxylic diimide (PDI) trimers substituted with different side groups at the bay positions were prepared with the triazine ring as a linkage. The free rotation of C-N-C bonds between the triazine ring and the PDI unit provide these molecules with some flexibility. The UV-vis absorption and fluore…
A facile polymer-template-aided synthesis is adopted to prepare single crystalline La0.7Sr0.3MnO3 nanowires by chemical solution deposition. The La0.7Sr0.3MnO3 nanowires crystallize in a novel monoclinic phase and exhibit ferromagnetic ordering at room temperature.
Amorphous CdSe nanoparticles were prepared by a base-catalyzed room-temperature reaction between cadmium nitrate and selenourea, with dodecanethiol as a capping ligand. The nanoparticle size could be controlled from 1.9 to 3.6 nm by increasing the water concentration in the reaction. When the nanoparticles were heated…
Abstract The initial stage of fiber structure development in the continuous neck‐drawing of amorphous poly(ethylene terephthalate) fibers was analyzed by in situ wide‐angle X‐ray diffraction, small‐angle X‐ray scattering, and fiber temperature measurements. The time error of the measurements (<600 μs) was obtained…
An analysis of capillary forces in wet paper and between two wet sheets leads to a number of interesting conclusions. Experimentally, it is found that the (static) friction force between two rewetted sheets is a maximum (4.8 kN/m 2 ) at a solids content of 38%, at which the air−water surface area is estimated to be a…
Optimization of the urea dosing system to maximize deNOx performance and to minimize NH3 slip during load changes is one of the main challenges for the mobile application of the urea–SCR (selective catalytic reduction) system. A mobile SCR system is restricted to a short distance between the engine exhaust and the cat…
Three cationic polymers with molecular weights and charge density of 3.0 x 10(5) g/mol and 10% (D 6010), 1.1 x 10(5) g/mol and 40% (D6040), and 1.2 x 10(5) g/mol and 100% (D6099) were investigated in aqueous NaCl solutions in the presence of silica. The atomic force microscope (AFM) colloidal probe technique was used…
Molecular dynamics computer simulations are performed to study structure and structural relaxation in the glassforming metallic alloy ${\text{Al}}_{80}{\text{Ni}}_{20}$. The interactions between the particles are modeled by an effective potential of the embedded atom type. Our model of ${\text{Al}}_{80}{\text{Ni}}_{20…
Hollow microspheres with multilayered porous shells are formed by a template-free method by hierarchical assembly of azithromycin molecules. This simple, rapid, and high-yielding method allows the number of layers to be tailored by regulating the initial concentration of azithromycin solution. Such structures may find…
We present point-contact spectroscopy data for junctions between a normal metal and the newly discovered F-doped superconductor LaO 0.9 F 0.1−δ FeAs (F-LaOFeAs). A zero-bias conductance peak was observed and its shape and magnitude suggest the presence of Andreev bound states at the surface of F-LaOFeAs, which provide…
We report the synthesis of atypical nanoparticles in donut shape with or without additional spherical nanoparticles attached on them by using the donut-like nanostructure formed in a thin film of triblock copolymers. In a high-humidity condition, a spin-coated film of triblock copolymer had donut-like holes consisting…
Different phases from the ZrO 2 −Y 2 O 3 system corresponding to 8, 10, 14, 21, 32, and 37 mol % Y 2 O 3, prepared by quenching from high temperature, have been studied by selected area electron diffraction (SAED) and high-resolution electron microscopy (HRTEM). The results of the 8 and 10 mol% Y 2 O 3 are consistent…
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