Materials Literature
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We have studied the Fe-based superconductor Ba${}_{0.55}$K${}_{0.45}$Fe${}_{1.95}$Co${}_{0.05}$As${}_{2}$ in order to identify the structure of the order parameter in this system by performing extensive low-temperature specific heat measurements in zero and in applied magnetic field. The pronounced superconducting jum…
Se ensayaron compuestos de polietileno de baja densidad reciclado y harina de madera y de corteza de Pinus radiata D. Don, para evaluar el efecto del contenido de harina y la densidad del compuesto sobre la absorción de agua e hinchamiento, dureza Rockwell, resistencia a la tracción y módulo de elas-ticidad en tracció…
The authors report on temporal oscillation in the first-order self-diffracted signal observed during the holographic grating recording in the azobenezne-functionalized polymer in the degenerate two-wave mixing experiment. Explanation of the oscillating character of the diffracted signal is given based on the assumptio…
Abstract Solid solutions In 2 − x Cr x Mo 3 O 12 have been prepared via the solid state reaction method. The structural and thermal expansion properties have been characterized using X‐ray diffraction. All compounds exhibit monoclinic structure with space group P2 1 /a at room temperature, and transform to orthorhombi…
Abstract Poly( L ‐lactic acid) (PLLA) films with different crystallinities were prepared by solvent casting and subsequently annealed at various temperatures ( T a ) (80–110°C). The effects of crystallinity on enzymatic degradation of PLLA films were examined in the presence of proteinase K at 37°C by means of weight…
A series of polyurethane elastomers (PUE) incorporating TDI (toluene diisocyanate) trimer were synthesized via an in-situ polymerization and prepolymer process. It was found that for the sample with 10 wt% or less TDI trimer, the stress–strain curves of PUE exhibited the characteristics of a ductile failure with relat…
A SiO 2 nanolayer, 1.0–2.8 mass% in content, was coated on cubic boron nitride (c BN ) powder by rotary chemical vapor deposition ( RCVD ). The morphology of the SiO 2 nanolayer changed from isolated islands to a continuous layer with increasing supply rate of the precursor, tetraethyl orthosilicate. The effect of the…
High yield of β-Ni(OH) 2 was synthesized by hydrothermal reaction. After heat treatment, novel NiO nanosheets with hexagonal nanopores were obtained. Transmission electron microscopy was employed to investigate the morphology and the crystallographic structure of the products, which indicated that the nanosheets were…
Macromolecular contrast agents have the potential to assist magnetic resonance imaging (MRI) due to their high relaxivity, but are not clinically useful because of toxicity due to poor clearance. We have prepared a biodegradable ketal-based polymer contrast agent which is designed to degrade rapidly at physiological p…
ZnO nanowires were grown by vapor-transport and deposition on Au nanocluster covered fused and thermal silica and c-Si. The nanowire size and density depended strongly on the substrate type. By decreasing the O2 to local Zn partial pressure ratio, the growth pattern changed to nanocombs and nanosheets. ZnO nanohedgeho…
In this paper, we demonstrate the feasibility of using in situ Dynamic Light Scattering (DLS) to monitor counter-diffusion crystallization experiments in capillaries. Firstly, we have validated the quality of the DLS signal in thin capillaries, which is comparable to that obtained in standard quartz cuvettes. Then, we…
A series of dibutyl-, diphenyl- and triphenyltin(IV) benzoate derivatives has been prepared. The products were obtained by reacting the dibutyltin(IV) dichloride, diphenyltin(IV) dichloride and triphenyltin(IV) chloride respectively via the dibutyltin(IV) oxide, diphenyltin(IV) dihydroxide and triphenyltin(IV) hydroxi…
In situ dynamic rheology was used to investigate the polymerization process of gelcasting suspensions based on fine alumina and water solution of methacrylamide and methylene bisacrylamide monomers. Small‐strain oscillatory shear measurements were able to detect the progress of the whole gelation process from the liqu…
We have theoretically investigated electronic, magnetic, and thermal properties of a graphene-diamond hybrid structure consisting of a graphene nanoribbon with zigzag edges connected to diamond surfaces. From the first-principles calculation, we found that the hybrid structure is stable and that the ferro-magnetically…
Transparent alumina with high transmission has been first successfully prepared by rapid vacuum pressureless sintering processing at lower sintering temperature and reduced soaking time, compared with conventional pressureless sintering. The alumina sintered at 1670°C for 5 min has a residual porosity of 0.002% and a…
Nylon is a relatively inert polymer. The ability to easily functionalize nylon with biomolecules will improve the utilization of nylon in biological systems. A potential use of the biofunctionalized nylon scaffolds is in devices for cell therapeutics that can specifically select cells present in small numbers, such as…
Abstract The development of novel and high‐performance cathodes is a critical issue to be addressed in order to reduce Solid Oxide Fuel Cells (SOFCs) operation temperature to the 600‐800 °C range or less. The performance of CeO 2 ‐based composite cathodes is very attractive to such operational temperatures. In this wo…
Density functional theory is used to simulate high-bias, constant-current scanning tunneling micrographs for direct comparison with experimental images. Coupled to previous spectroscopic data, these simulations are used to determine the atomic structure of Ti-rich nanostructures on strontium titanate (001) surfaces. T…
Proton nuclear spin relaxation has been for the first time extensively used for a structural and dynamical study of low-molecular-weight organogels. The gelator in the present study is a modified phenylalanine amino acid bearing a naphthalimide moiety. From T(1) (spin-lattice relaxation time in the laboratory frame) a…
In this work, effects of interstitial oxygen on the ferromagnetism in Gd-doped GaN system were investigated via first principles, including both total energy and band structure calculation. The results of these calculations indicate that splitting interstitial sites oxygen is a plausible candidate for defect-induced m…