Materials Literature
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Layer-by-layer sequential adsorption technique (LBL) can be utilized as a deposition method for nanostructured coatings on highly curved micrometer to millimeter scale surfaces, which is demonstrated in this work on a model films of strongly luminescent CdTe nanoparticles. Unlike LBL on colloids and flat surfaces, suc…
(Y 0.95 Eu 0.05 ) 2 O 3 nanoparticles have been synthesized by subambient homogeneous reduction using alkalide solutions and subsequent oxidation. As synthesized, the material consists of free-flowing agglomerates of ill-defined, amorphous, or subnanocrystalline nanoparticles. Samples annealed at 500 °C or greater are…
New hybrid polyoxazolines (CubePOZO) were synthesized by ring-opening polymerization of 2-methyl-2-oxazoline initiated by functionalized polyhedral oligomeric silsesquioxane (POSS) with various feed ratios. The hybrid micelles derived from CubePOZO with both seven hydrophobic cyclopentyl groups of POSS and polyoxazoli…
A low-temperature, nonaqueous synthesis approach is described that produces a series of gallium sulfide and polysulfide three-dimensional superlattices from binary Ga-S and ternary Zn-Ga-S supertetrahedral clusters. The diversity of superlattices is achieved by modifying the cluster size, the cluster composition, and…
We report the magnetotransport characteristics of a trilayer ferromagnetic tunnel junction built of an electron doped manganite (${\mathrm{L}\mathrm{a}}_{0.7}{\mathrm{C}\mathrm{e}}_{0.3}{\mathrm{M}\mathrm{n}\mathrm{O}}_{3}$) and a hole doped manganite (${\mathrm{L}\mathrm{a}}_{0.7}{\mathrm{C}\mathrm{a}}_{0.3}{\mathrm{…
A spatially ordered quantum dot array of cationic indium nanoclusters has been synthesized in a single crystal of zeolite X. A single crystal of fully dehydrated and fully indium-exchanged zeolite X (ca. In 87 Si 100 Al 92 O 384, In 87 −X) was exposed to 0.5 atm of H 2 S for 12 h at 673 K. After it was evacuated at te…
Transmission gratings were formed holographically in polymer dispersed liquid crystal (HPDLC) composite materials using commercially available UV-curable acrylate monomers and the nematic liquid crystal TL203. Monomer mixtures with average functionality ranging from 1.3 to 3.5 were used to prepare HPDLC transmission g…
We report an enhancement of the electron spin relaxation time (T1) in a (110) InAs/GaSb superlattice by more than an order of magnitude (25 times) relative to the corresponding (001) structure. The spin dynamics were measured using polarization sensitive pump probe techniques and a mid-infrared, subpicosecond PPLN OPO…
We report on the generation of coherent phonon polaritons in ZnTe, GaP and LiTaO$_{3}$ using ultrafast optical pulses. These polaritons are coupled modes consisting of mostly far-infrared radiation and a small phonon component, which are excited through nonlinear optical processes involving the Raman and the second-or…
Abstract Polypyrrole (PPy) was polymerized both chemically and electrochemically in sequence on nylon 6 woven fabrics, giving rise to polypyrrole–nylon 6 composite fabrics (PPy–N) with a high electric conductivity. The stability of the composite prepared by electrochemical polymerization (ECP) on chemical oxidative po…
This study focuses on luminescent materials based on the antenna effect and prepared by the sol−gel method. These materials are composed of a Eu(III) complex (luminescence center) entrapped in a xerogel matrix. Luminescence properties of the lanthanide-based emitting materials depend on the efficiency of energy transf…
The ferromagnetic phase in La0.7Sr0.3MnO3 manganite is completely spin polarized (100%) at room temperature. This is demonstrated on high quality epitaxial films by Spin-Polarized Scanning Tunneling Microscopy. The films consist of a highly homogeneous ferromagnetic (FM) phase in which minority paramagnetic (PM) defec…
The view that the large red shifts seen in the UV-visible absorption bands of peripherally crowded nonplanar porphyrins are the result of nonplanar deformations of the macrocycle has recently been challenged by the suggestion that the red shifts arise from substituent-induced changes in the macrocycle bond lengths and…
The (1x1) terminated (0001)-Zn surface of wurtzite ZnO was investigated with scanning tunneling microscopy. The surface is characterized by the presence of nanosized islands with a size-dependent shape and triangular holes with single-height, O-terminated step edges. It is proposed that the resulting overall decrease…
Geometrical validation around the Calpha is described, with a new Cbeta measure and updated Ramachandran plot. Deviation of the observed Cbeta atom from ideal position provides a single measure encapsulating the major structure-validation information contained in bond angle distortions. Cbeta deviation is sensitive to…
Abstract For Abstract see ChemInform Abstract in Full Text.
In this study, polyurethane composites were produced with rice husk (RH) with polypropylene glycol, molecular weight (Mw) of 400 (PPG400) used as polyols. The effect of percentage of RH (by weight), percentage of RH hydroxyl (OH) groups, and RH size on the flexural, tensile, and impact properties were investigated. Fo…
Seven aromatic dicarboxylic acids were esterified by melt polycondensation in two steps with 1,3‐propanediol (1,3‐PDO) in the presence of tetrabutoxytitanium as catalyst. The acids used were: terephthalic (TPA), isophthalic (IPA), naphthalene‐2,6‐dicarboxylic (2,6‐NDA), naphthalene‐1,4‐dicarboxylic (1,4‐NDA), biphenyl…
Abstract Tetranuclear and hexanuclear nickel(II) complexes with N,N′-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N′-dimethyl-1,2-ethanediamine (H2L), [Ni4L2(CH3COO)4]·4THF and [Ni6L3(OH)4(NO3)2(H2O)2]·2DMF, have been synthesized and characterized by X-ray crystallography, electronic spectroscopy and magnetic susceptibility me…
Kenaf–thermoplastic natural rubber (Kenaf–TPNR) composites were developed and evaluated in this study. The kenaf was blended with TPNR and maleic anhydride-grafted polypropylene (MAPP) as a compatibilizer in an internal mixer (Brabender). The mechanical properties of the composites were investigated by tensile, impact…