Materials Literature
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Five new silver(I)–organic frameworks containing ethynediide or alkyl and aryl ethynide, together with newly designed oligo-α-sulfanylpyrazinyl ligands, namely, [(Ag 2 C 2 ) 2 (AgCF 3 COO) 11 (L 1 )(μ 2 -DMSO) 3 (DMSO) 5 ]· 1 / 4 H 2 O (L 1 = 2,6-bis(pyridin-2-ylthio)pyrazine, 1 ), [(Ag 2 C 2 ) 2 (AgCF 3 COO) 11 (L 2…
Porous GaN layers are grown on silicon from gold or platinum catalyst seed layers, and self-catalyzed on epitaxial GaN films on sapphire. Using a Mg-based precursor, we demonstrate p-type doping of the porous GaN. Electrical measurements for p-type GaN on Si show Ohmic and Schottky behavior from gold and platinum seed…
In grating-over-lens spectrum splitting designs, a planar transmission grating is placed at the entrance of a plano-convex lens. Part of the incident solar spectrum is diffracted at 15-30° from normal incidence to the lens. The diffracted spectral range comes to a focus at an off-axis point and the undiffracted spectr…
Abstract Epoxides have been obtained from aldehydes and phenyldiazomethane using catalytic amounts of both the copper homoscorpionate complexes TpxCuL (Tpx=homoscorpionate ligand; L=acetonitrile or tetrahydrofuran, THF) and dimethyl sulfide (SMe2) in high yields and diasteroselectivities, and with activities higher (T…
We study the low-lying excitations in 5$d$ transition-metal oxide Sr${}_{2}$IrO${}_{4}$ on the localized electron picture. We find that Hund's coupling together with the spin-orbit interaction leads to exchange anisotropy which causes the spin wave gap. Introducing the isospin operators acting on Kramers' doublet in I…
We report a hybrid photovoltaic device composed of a 3.3 eV bandgap zinc oxide (ZnO) semiconductor and metal-free phthalocyanine layers and the effects of the insertion of the highly resistive ZnO buffer layer on the electrical characteristics of the rectification feature and photovoltaic performance. The hybrid photo…
We report, herein, a novel supramolecular synthon based on the electrostatic compression phenomenon. A zwitterionic squaric acid/squaramide compound serves as a model for the design of new face-to-face π-stacked architectures in the crystalline state which, in combination with charge-assisted hydrogen bonds, can be us…
The photophysics of trans-2-[4-(dimethylamino)styryl]benzothiazole (DMASBT) was investigated by electronic structure calculations and steady-state and time-resolved emission spectroscopy in a wide range of solvents, including temperature and pressure dependence. DMASBT undergoes a facile photoinduced trans-cis isomeri…
The use of chemical functionalization of nanoparticles for controlled assembly relies on selective surface modification that promotes highly specific chemical transformations. It is often also important to control physical properties of the materials produced by this approach, and in the case of iron nanoparticles, ma…
Luminescent solar concentrators (LSCs) have the ability to receive light from a wide range of angles, concentrating the captured light onto small photo active areas. This enables greater incorporation of LSCs into building designs as windows, skylights and wall claddings in addition to rooftop installations of current…
We explore finite size effects in the crystallization of a bulk metallic glass with nm-scale dimensions. Nanorods of Pt57.5Cu14.7Ni5.3P22.5 are produced by thermoplastic extrusion of supercooled liquid through a nanoporous template. The nanorods exhibit remarkable differences in their crystallization behavior above th…
Presented here is a chiral three-dimensional indium(III)-organic compound [In(5-Aip) 2 ]·(TPP)·4H 2 O ( 1; 5-Aip = 5-aminoisophthalate, TPP = tetraphenylphosphonium). The structure of 1 features an unusual tetrahedral anionic framework containing tetrahedral TPP guests. This compound shows interesting photoluminescent…
At advanced nodes, CMOS logic is being designed in a highly regular design style because of the resolution limitations of optical lithography equipment. Logic and memory layouts using 1D Gridded Design Rules (GDR) have been demonstrated to nodes beyond 12nm.[1-4] Smaller nodes will require the same regular layout styl…
The synthesis and further hydrogenation of fluorinated polynorbornene dicarboximides is reported, using p ‐toluenesulfonyl hydrazide and Wilkinson's catalysts, respectively. Despite improving the resistance to thermo‐oxidative degradation, it is observed that the hydrogenation of the backbone double bonds in the polym…
Recently natrolite was shown to be an auxetic material that is able to exchange extra-framework Na + cations with other mono-, di-, and trivalent cations. Under pressure up to several GPa, these cation-exchanged natrolites undergo superhydration and/or phase transformations in the cation–water arrangement. Using densi…
The mechanism of reaction between peroxodisulfate ion (S2O8(2-)), selenite (Se(IV)O3(2-)) and Mn(2+) as an inhibitor of selenite oxidation was studied using aqueous solutions composed of commercial reagents, as well as limestone-gypsum flue gas desulfurization (FGD) liquors sampled from coal fired power plants. The ox…
High pressure and high temperature x-ray absorption near edge spectroscopy experiments have been carried out on Ce60Al20Cu20 bulk metallic glass showing an electronic delocalization of the 4f-electron of cerium under pressure. In parallel, high pressure extended x-ray absorption fine structure spectroscopy reveals lar…
Metallized polypropylene film capacitors (MPPFCs) are widely used in pulse power systems for their characteristics of high reliabilities, high energy densities, and excellent pulse power handling capabilities. The teardown showed that the capacitance loss decreased gradually from the outer layers to the inner layers i…
Using spot profile analysis low energy electron diffraction, we studied the growth mode and strain state of ultra-thin epitaxial Bi2Se3(111) films grown by molecular beam epitaxy on Si(111). The first layer grows as complete quintuple layer and covers the Si substrate before the next layer nucleates. Its lateral latti…
The geometry change of 5-cyanoindole upon electronic excitation from the ground to the lowest excited singlet state has been determined from a combined fit of the rotational constant changes upon excitation and the vibronic intensities in various fluorescence emission spectra using the Franck-Condon principle. The so…