Materials Literature
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Abstract A potentially useful semiorganic nonlinear optical (NLO) material, L‐arginine perchlorate, has been synthesized and bulk crystals have been grown by slow cooling technique. The grown crystals were characterized by single crystal X‐ray diffraction, UV‐Vis‐NIR spectroscopy, FT‐IR, thermal analysis and SHG measu…
The effect of the partial pressure of acetylene on the height of carbon nanotube films synthesized by the water-assisted CVD (WA-CVD) was studied. Initially, Fe (2 nm)/Al 2 O 3 (15 nm) bilayers were deposited onto a silicon substrate and subjected to the WA-CVD to grow carbon nanotubes. The growth was carried out at 8…
Since the early days of studies on thermoelectric clathrates it has been evidenced that the lowering of thermal conductivity in these compounds is related to the guest ion's rattling characteristics. Here we report on the relation between the guest vibration and lattice thermal conductivity κ L in single crystalline s…
Abstract Large single crystals of the polar (point group mm 2) compound tris(glycine) zinc chloride, (NH 3 CH 2 COO) 3 · ZnCl 2 , were grown from aqueous solutions. The refractive indices were measured in the wavelength region from 365 nm to 1083 nm and an unpolarised absorption spectrum was recorded (transparency ran…
The DmsD protein is necessary for the biogenesis of dimethyl sulphoxide (DMSO) reductase in many prokaryotes. It performs a critical chaperone function initiated through its binding to the twin-arginine signal peptide of DmsA, the catalytic subunit of DMSO reductase. Upon binding to DmsD, DmsA is translocated to the p…
The crystallographic and magnetic properties of $\mathrm{Ca}{\mathrm{Ru}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}{\mathrm{O}}_{3}$ $(0\ensuremath{\le}x\ensuremath{\le}1.0)$ were investigated in detail by x-ray powder diffraction, magnetization, and magnetic Compton scattering measurements. The lattice parameters show cons…
The thermophysical properties of cationic conjugated polymers and oligomers are characterized, and the extent of hygroscopicity is explored. The rate of moisture absorption, water affinity, and water content are important properties to consider for incorporation into optoelectronic devices. Guidelines for controlling…
We study the rolling and sliding motion of droplets on a corrugated substrate by Molecular Dynamics simulations. Droplets are driven by an external body force (gravity) and we investigate the velocity profile and dissipation mechanisms in the steady state. The cylindrical geometry allows us to consider a large range o…
TlGaSe 2 and TlGaSe 2 :Gd single crystals were grown by the Stockbarger method. There are no cracks or voids on the surface of ingots. The samples were cleaved along the cleavage planes (001). The freshly cleaved crystals had mirror-like surfaces even before using mechanical treatment. The phonon energies in TlGaSe 2…
Phase relations at 900 °C, crystal chemistry, electrical and thermal transport measurements, and heat capacity data are reported for the clathrate systems: Ba 8 {Pd,Pt} x Si 46- x . For both systems a ternary clathrate phase was identified with a small homogeneity region extending at 900 °C for 2.5≤ x Pd ≤4.1 and 2.8≤…
A parallel algorithm designed for widely used distributed computer clusters is developed for the real-space self-consistent-field theory for polymers. We adopt an efficient data partition method to ensure high performance of this parallel algorithm on clusters, which enables us to explore unknown phase structures of c…
Abstract We present a photocleavable protecting group based on ruthenium bipyridyl complexes and suitable for amino acid photodelivery. We discuss the photochemical properties of the caged glutamate, which is a major neurotransmitter in the CNS. The molar absorptivity for the caged glutamate at 450 nm is ϵ = 4200 M –1…
Abstract Single crystals of REE, Al borates, new and known representatives of huntite family are obtained by annealing of REEBO 3 on Al 2 O 3 surface at 1100°C. Phase identification for REE=Pr, Eu, Tb, Tm, Ho, Yb has been carried out using unit cell parameter determination on single crystals. Crystal structures of C 2…
A simple, flexible, and robust way of fabricating fully functional electromechanical carbon nanotube (CNT) microprobes, by transferring as-grown CNT columns onto a conductive substrate using a conductive epoxy (see figure), is shown. The CNT microprobes are approximately 500 times stronger than as-grown pillars and ca…
A new class of devices based on a hybrid combination of two different materials, nanotubes and liquid crystals, is presented. An array of individual vertically aligned multiwall carbon nanotubes creates a Gaussian electric field profile which reorients a nematic liquid crystal. The variation in refractive index acts l…
Absorption at multiple resonance frequencies is observed in magnetic nanoparticles in strong similarity with forbidden multiple quantum transitions known for paramagnetic ions. Temperature and concentration dependences have been studied to reveal the origin of the signals. The results are discussed using a ``quantizat…
Stress-assisted grain growth at room temperature is identified as a plastic deformation mechanism in nanocrystalline thin films. Unique surface relief is attributed to the direct application of stress-coupled grain boundary migration theory. The figure shows a false-color SEM image of surface topography and an AFM hei…
Abstract Microparticles with controlled porosity have been widely used in various applications. In this Full Paper, a new method of freezing emulsions has been developed to prepare porous microparticles with unique aligned porosity. Aligned porous poly(ϵ‐caprolactone) microparticles are formed on an aligned porous pol…
The free four-coordinate Fe(III) porphyrin cation has not been previously observed due to its extreme electrophilicity. In order to isolate this very reactive species, we have synthesized a highly sterically hindered bis-pocket siloxyl porphyrin which has a top opening of only 2 Å. NMR studies of this Fe(III) porphyri…
First, molecular scale insight into the mobility of a novel class of organic materials for photonic applications with electro-optical activities larger than 300 pm/V is presented. A representative second order nonlinear optical (NLO) material of this class of self-assembling molecular glasses involving quadrupolar phe…