Materials Literature
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A four-time correlation function was calculated using a computer simulation of a binary Lennard-Jones mixture. The information content of the four-time correlation function is similar to that of four-time correlation functions measured in NMR experiments. The correlation function selects a subensemble and analyzes its…
The hydrosilylative reaction utilizing octakis(dimethylsiloxy)silsesquioxane and silsesquioxane disilanols bearing alkenylsilyl moieties produces a series of starburst-type giant silsesquioxanes and a second-generation dendritic molecule as well as a boron-containing one.
High-accuracy single-crystal structure factor data sets, complete up to $\mathrm{sin}\phantom{\rule{0.2em}{0ex}}\ensuremath{\theta}∕\ensuremath{\lambda}=1.6\phantom{\rule{0.3em}{0ex}}{\mathrm{\AA{}}}^{\ensuremath{-}1}$, have been measured from paramagnetic NiO at $550\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ and in the a…
We present a study of the spin-Peierls (SP) transition in the ${(\mathrm{TMTTF})}_{2}{\mathrm{PF}}_{6}$ organic conductor by elastic neutron scattering. The $(\frac{1}{2},\frac{1}{2},\frac{1}{2})$ superstructure reflection associated with the SP transition is clearly detected up to $18\phantom{\rule{0.3em}{0ex}}\mathr…
The neutral nickel and gold complexes with bis(trifluoromethyl)tetrathiafulvalenedithiolate ligands, [M(hfdt)2] (M = Ni, Au) were prepared in order to examine the possibility of the development of single-component molecular conductors soluble in organic solvents. However, in contrast to the previous report, the crysta…
Reversible redox-switching of through-bond magnetic interaction has been achieved by conformation change of the tetraarylethylene moiety upon redox input: intramolecular magnetic interaction between two nitroxide groups is dead after oxidation, whereas it was alive before.
The nature of metal-insulator transition and ferromagnetism phenomena of perovskite ${\mathrm{La}}_{0.7}{\mathrm{Ce}}_{0.3}{\mathrm{MnO}}_{3}$ thin films was investigated. In particular, the effects of post-annealing under oxidization and reduction atmospheres on the electrical transport and magnetic properties were s…
The achievement of a true nanotechnology is regarded as one of the Holy Grails of modern science. To achieve this will require the construction by synthesis or self-assembly of complex functional nanoarchitectures. Such structures might contain combinations of one-, two-, and three-dimensional phenylene nanostructures…
This paper reports a dendritic system which is capable of forming both one-component and two-component gels--interestingly the addition of the second component can either increase or decrease the degree of gelation, depending on dendritic generation.
The thermal conductivity $\ensuremath{\kappa}(T)$ of the $R\mathrm{V}{\mathrm{O}}_{3}$ crystals was measured. At $T>{T}_{\ensuremath{\infty}}$, $R\mathrm{V}{\mathrm{O}}_{3}$ crystals conduct heat like a glass; the phonon contribution to $\ensuremath{\kappa}(T)$ is completely suppressed by spin and orbital fluctuati…
Mg and Nb-doped Mg films were deposited by rf magnetron sputtering. Morphological and structural analysis were performed by scanning electron microscopy and x-ray diffraction. The desorption kinetics has been investigated by using a Sievert-type apparatus. The overall activation energy and the reaction order controlli…
The crystal structure and magnetic properties of SmCo7−xHfx (x=0.05,0.1,0.2,0.3) compounds were studied by means of x-ray powder diffraction and magnetic measurements. The as-cast compounds SmCo7−xHfx with x=0.1 and 0.2 crystallize in the TbCu7-type structure with the space group P6∕mmm. According to the structure ref…
Abstract Summary: The communication provides a novel and alternative route to generate chemically tethered binary polymer‐brush pattern through two‐step surface‐initiated atomic‐transfer radical polymerization (SI‐ATRP). Polymer brush‐1 was prepared by SI‐ATRP, passivated by a reaction with NaN 3 , and etched with UV…
We use ab initio molecular dynamics simulations to study a sample of liquid silica containing $3.84\phantom{\rule{0.3em}{0ex}}\mathrm{wt}\phantom{\rule{0.2em}{0ex}}%\phantom{\rule{0.3em}{0ex}}{\mathrm{H}}_{2}\mathrm{O}$. We find that, for temperatures of 3000 and $3500\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, water is a…
Pb ( Nb 0.02 Zr 0.2 Ti 0.8 ) O 3 thin films with thickness of 900nm were spincoated on platinized silicon substrate using the sol–gel method. X-ray diffraction and field emission scanning electron microscopy show that the films are highly a-axis-oriented with columnar structure. A large remnant polarization (Pr+) ∼92.…
Abstract Pulp and paper manufacturing constitutes one of the largest industry segments in the United States in term of water and energy usage and total discharges to the environment. More than many other industries, however, this industry plays an important role in sustainable development because its chief raw materia…
Dynamical mean field theory is employed to calculate the properties of multilayered inhomogeneous devices composed of semi-infinite metallic lead layers coupled via barrier planes that are made from a strongly correlated material (and can be tuned through the metal-insulator Mott transition). We find that the Friedel…
The refractive indices and linear electro-optic (EO) properties of (1−x)Pb(Mg1∕3Nb2∕3)O3−xPbTiO3 single crystals were investigated over a broad composition range. The orientation and temperature effect on the EO coefficients were also examined. Large EO coefficients rc were observed near the morphotropic phase boundar…
Z -scan and pump-probe measurements with ultrafast, 800nm laser pulses were used to compare the ultrafast optical nonlinearities of VO2 nanoparticles and thin films in both semiconducting and metallic states. In the metallic state, both the nanocrystals and thin films exhibit a positive, intensity-dependent nonlinear…
ZnO single-crystal microtubes were fabricated using an encapsulated microwave growth method. The ZnO crystals are grown in hexagonal hollow tube form with a well faceted end and side surfaces, which have cross-sectional dimensions of 100to250μm, lengths of 3–5mm, and wall thickness of 1–2μm. Under optical excitation,…