Materials Literature
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Ferromagnetic insulators deposited on graphene can induce ferromagnetic correlations in graphene. We estimate that induced exchange splittings $\ensuremath{\Delta}\ensuremath{\sim}5\phantom{\rule{0.3em}{0ex}}\mathrm{meV}$ can be achieved by, e.g., using the magnetic insulator EuO. We study the effect of the induced sp…
Abstract Three novel polyoxometalate compounds consisting of Anderson‐type anions and trivalent lanthanide cations, [Ln(H 2 O) 7 Cr(OH) 6 Mo 6 O 18 ] n ·4nH 2 O (Ln = Ce 1 ; Sm 2 ; Eu 3 ), have been synthesized in aqueous solution and characterized by single crystal X‐ray diffraction, elemental analyses, IR spectra, a…
$\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (STO), $\mathrm{Sr}\mathrm{Mn}{\mathrm{O}}_{3}$ (SMO), and $\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3}$ (LMO) ultrathin films with layer thicknesses of 1--4 perovskite unit cells were grown on a STO substrate. The physical and electronic structures of ultrathin films and interfaces…
Hyper-Raman spectra of two lithium borate glasses, 4B 2 O 3 :Li 2 O and 2B 2 O 3 :Li 2 O, are compared to those of pure boron oxide glass, v -B 2 O 3 . A mode analysis is performed using a structural model based on the symmetry of the elementary structural units (ESUs) constituting the glasses. Most spectral component…
Epitaxial layers of uranium have been grown on a variety of buffer/seed layers on sapphire substrates by UHV magnetron sputtering and their structure determined using x-ray diffraction. The buffer layers were epitaxial layers of niobium, tungsten and niobium covered by a seed layer of hcp gadolinium, on which uranium…
In this work, we analyze the far-field pattern produced by a grating made of strips with two different random roughness levels. The efficiency and shape of the diffraction orders is obtained, which are shown to depend on the statistical properties of roughness. We assume for the calculations that the grating can be us…
Double patterning (DP) has now become a fixture on the development roadmaps of many device manufacturers for half pitches of 32 nm and beyond. Depending on the device feature, different types of DP and double exposure (DE) are being considered. This paper focuses on the requirements of the most complex forms of DP, pi…
Abstract Syntheses and Structures of the First Polynuclear Manganese Guanidine Complexes and of the First Manganese Complexes Containing Mono‐Protonated Bis‐Guanidine Ligands Metallation of two differently alkylated bis‐guanidine ligands containing a central pyridine functionality, namely N 2 ,N 6 ‐bis(1,3‐dimethylimi…
We disclose the synthesis of a porphyrin-fullerene pinwheel that was subsequently observed by scanning tunneling microscopy. The molecule was designed to further our understanding of fullerene-surface interactions, directional control, and surface-rolling versus pivoting capabilities of this class of nanomachines. The…
Strontium sulfide doped with copper has been regarded as one of the most promising inorganic materials for the blue-green color phosphor. A wet chemical precipitation method with post-annealing is presented for the synthesis of copper-doped SrS nanoparticles. XRD studies revealed the phase purity of SrS particles with…
In this work, we report a hydrothermal method for self-assembly and organization of as-synthesized gold nanoparticles into various aggregative morphologies. Using the assembled gold nanoparticles as structural precursors, furthermore, mesoporous gold spheres in either discrete or interconnected form can be prepared at…
We have investigated, for oblique propagation, the dispersion relation and associated electric fields of one-dimensional photonic crystals composed of alternating layers of right-handed and left-handed materials (RHM and LHM). Calculations are performed by assuming that the dielectric permittivity and magnetic permeab…
The solubility data of adefovir dipivoxil in five different binary mixed solvents formed by isopropyl ether with ethanol, 2-propanol, dichloromethane, ethyl acetate, and acetone at 298.15 K were measured with the mole fraction of isopropyl ether ranging from 0.000 to 1.000. A laser monitoring observation technique was…
A new pyrochlore-type structure (Bi 1.56 Co 0.44 )(Sb 1.48 Co 0.52 )O 7 compound has been synthesized using ceramic method in air. Rietveld refinements using X-ray powder diffraction data confirmed an overall A 2 B 2 O 7 cubic pyrochlore structure with a = 10.44896 (2) Å and Fd -3 m symmetry. The reliability factors a…
Abstract Two mixed‐valent disc‐like hepta‐nuclear compounds of [Fe II Fe III 6 ( tea ) 6 ](ClO 4 ) 2 ( 1Fe , tea = N(CH 2 CH 2 O) 3 3− ) and [Mn II 3 Mn III 4 ( nmdea ) 6 (N 3 ) 6 ]·CH 3 OH ( 2Mn , nmdea = CH 3 N(CH 2 CH 2 O) 2 2− ) have been synthesized by the reaction of Fe(ClO 4 ) 2 ·6H 2 O with triethanolamine (H…
The structure of the thermoelectric lamellar misfit cobalt oxide [Bi0.84CaO2]2[CoO2]1.69 has been refined using single crystal X-ray diffraction data. Using the four dimensional superspace formalism for aperiodic structures, the superspace group is confirmed P2/m(0delta1/2) (a1 = 4.9069(4), b1 = 4.7135(7), b2 = 2.8256…
Abstract P(AN‐GMA) and PGMA fibers coated with monodisperse silver nanoparticles have been prepared by a combination of electrospinning and electroless plating. The morphology of the electrospun fibers remains unchanged after surface hydrazination. Oxidation of hydrazine in an ammoniacal solution of AgNO 3 reduces and…
Abstract Two europium complexes {Eu · dbm · carb · phen = tris[1‐{[6‐(9 H ‐carbazol‐9‐yl)hexoxy]phenyl}‐3‐{[6‐(9 H ‐carbazol‐9‐yl)hexoxy]phenyl}propane‐1,3‐dione](1,10‐phenanthroline)europium(III), Eu · dbm · carb · bath = tris[1‐{[6‐(9 H ‐carbazol‐9‐yl)hexoxy]phenyl}‐3‐{[6‐(9 H ‐carbazol‐9‐yl)hexoxy]phenyl}propane‐1,…
We have synthesized and characterized four different stable phases of Na ordered Na x CoO 2 , for 0.65< x <0.8. Above 100 K they display similar Curie-Weiss susceptibilities as well as ferromagnetic q =0 spin fluctuations in the CoO 2 planes revealed by 23 Na NMR data. In all phases from 59 Co NMR data we display evid…
Both the ferroelectric and magnetic properties of polycrystalline BiFeO3 films fabricated by chemical solution deposition were enhanced by adding small amounts of cobalt. Addition of 3at.% cobalt to BiFeO3 films increased the remanent polarization from 49to72μC∕cm2 and decreased the electric coercive field from 0.54to…