Materials Literature
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We applied hydrostatic pressure (up to 10 GPa) to single-walled carbon nanotube bundles at low temperature (down to 2 K) to measure their magnetoresistance (MR) in a field up to 12 T. We found a pressure-induced transition in MR from positive to negative in the high-field regime. The onset of the transition occurs at…
We have shown that ETEM is a valuable technique for understanding the response of nanoparticle systems to a gaseous environment at near atomic-level. The modern ETEM allows the dynamic behavior of the nanoparticles to be studied in real time with atomic-resolution imaging and electron diffraction in up to 50 Torr of g…
The dielectric characteristics of BaBi 2 Nb 2 O 9 , BaBi 4 Ti 4 O 15 , BaBi 8 Ti 7 O 27 , and La‐substituted SrBi 4 Ti 4 O 4 were investigated to discuss their ferroelectric phase transition and relaxor behaviors. BaBi 2 Nb 2 O 9 showed typical relaxor behaviors, and a shift of T m with increasing frequency was observ…
First-principles calculations based on a density functional theory were carried out to investigate electronic properties of ${\mathrm{BC}}_{2}\mathrm{N}$ nanotubes. It was found that the strain energy of the ${\mathrm{BC}}_{2}\mathrm{N}$ nanotube depends on the diameter but independent of the chirality of the tube. Th…
The collapse mechanism of microparticulate Langmuir films was studied experimentally in the present work. Using a Wilhelmy film balance, surface pressure vs area isotherms were determined, and the particle removal during the compression was examined by video-microscope and by naked eye. Upon compressing partially wett…
Patterns of changes in cell size, growth rate, and the inducibility of spermatogenesis were followed in eight sub‐clones of two isolates of the centric diatom Thalassiosira weissflogii (Grunow) Fryxell & Hasle grown at saturating light. One isolate originated from Long Island Sound, New York, USA and the other ori…
Hierarchical wurtzite ZnS architectures assembled from nanosheets and nanorods, such as branched flowers and fluffy solid and hollow spheres, have been synthesized by a facile, template-free, low-temperature solution route. The growth of wurtzite ZnS nanostructures at temperatures as low as 4 °C without any organic ad…
A continuum description of the time evolution of an ensemble of parallel straight dislocations has recently been derived from the equations of motion of individual dislocations. The predictions of the continuum model were compared to the results of discrete dislocation dynamics (DDD) simulations for several different…
Humic acids have stable radicals that are indigenous to their structure. Hydroxybenzoic acid derivatives such as gallic acid (GA) and protocatechuic acid are appropriate models for the radical properties of humic acids. Here we show that the adsorption or intercalation of gallic acid in Laponite clay results in a sign…
Two different one pot routes to a variety of metal cubane compounds are reported; one route is based on an in situ benzilic acid type rearrangement and the other involves in situ nucleophilic attack at a ketone. Diketosuccinic acid in basic solution in the presence of certain divalent metal ions undergoes a benzilic a…
Monochromatic high-energy x-ray diffraction measurements employing microfocusing optics were performed on glassy $\mathrm{Ge}{\mathrm{Se}}_{2}$ in a diamond anvil cell at pressures up to $9.3\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. In addition, the method of isotopic substitution in neutron diffraction was applied to…
CaCu 3 Ti 4 O 12 (CCTO) ceramics sintered in air at 1115°C for 3 and 24 h have been heat treated in N 2 at 1000°C. Surface layers develop on the outer regions of the ceramics, and a combination of X‐ray diffraction and analytical electron microscopy has been used to establish the phase content of the layers. A model t…
Piezoelectric ceramics Na 1− x Ba x Nb 1− x Ti x O 3 with low BaTiO 3 concentrations x have been prepared by the solid‐state reaction method, and their ferroelectric and piezoelectric properties have been studied. The ceramics are classic ferroelectrics when x ≤0.10, and the ferroelectric–paraelectric phase transition…
Theoretical variations in the Young’s modulus of single-walled carbon nanotubes with tube radius and temperature: a molecular dynamics study, Hsieh, Jin-Yuan, Lu, Jian-Ming, Huang, Min-Yi, Hwang, Chi-Chuan
Hydrosilylation of methyl 10-undecenoate (UDM) with phenyl tris(dimethylsiloxy)silane (PTDS) followed by a reduction of carboxylate groups was used to obtain a silicon-containing polyol with terminal primary hydroxyl groups (PSi194). Biobased silicon-containing polyurethanes, with a silicon content between 1.7% and 9.…
We report comprehensive simulations of the critical dynamics of a symmetric binary Lennard-Jones mixture near its consolute point. The self-diffusion coefficient exhibits no detectable anomaly. The data for the shear viscosity and the mutual-diffusion coefficient are fully consistent with the asymptotic power laws and…
A novel heterometallic 3d-4f metal-azido complex of mixed ligands, showing unprecedented structure type and interesting magnetic properties, has been hydrothermally synthesized and characterized.
Cyclic high-pressure torsion, a modified version of high-pressure torsion, is applied to Armco iron and nickel. The results in terms of microstructure and flow stress are compared to samples deformed by conventional high-pressure torsion. For both processes and both materials, a saturation in the decrease of the struc…
A Mg/Al layered double hydroxide (LDH) was intercalated with the anionic herbicides 2,4-D, MCPA, and picloram by using three different methodologies: (i) direct synthesis (DS), (ii) regeneration (RE), and (iii) ion exchange (IE). The resulting complexes were characterized and assayed by batch release and column leachi…
Bismuth telluride (Bi 2 Te 3 )-based solid solutions are state-of-the-art thermoelectric (TE) materials for cooling applications at room temperature with a high figure of merit ZT. Nanostructured TE bismuth telluride thick films have been fabricated by electrodeposition from a solution containing bismuth nitrate and t…