Materials Literature
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Evidence for supercurrent connectivity in conglomerate particles in NdFeAsO1−δ , Moore, J D, Morrison, K, Yates, K A, Caplin, A D, Yeshurun, Y, Cohen, L F, Perkins, J M, McGilvery, C M, McComb, D W, Ren, Z A, Yang, J, Lu, W, Dong, X L, Zhao, Z X
CdTe nanowires with controlled composition were cathodically electrodeposited using track-etched polycarbonate membrane as scaffolds and their material and electrical properties were systematically investigated. As-deposited CdTe nanowires show nanocrystalline cubic phase structures with grain sizes of up to 60 nm. Th…
The effect of poly(ethylene glycol) PEG crystallization on beta-sheet fibril formation is studied for a series of three peptide/PEG conjugates containing fragments modified from the amyloid beta peptide, specifically KLVFF, FFKLVFF, and AAKLVFF. These are conjugated to PEG with M n = 3300 g mol (-1). It is found, via…
Indium sulfide (In2S3) layers were deposited on glass substrates by close-spaced evaporation of In2S3 powder at various deposition temperatures in the range 200–350 °C. The chemical composition, structure, surface morphology, optical and electrical studies were carried out using appropriate techniques. The chemical co…
Boranates (tetrahydroborates) are studied intensively because of their potential use as hydrogen storage materials. In this Article, we present a first-principles study of α-Mg(BH 4 ) 2 at the level of density functional theory. We optimize the complex structure of α-Mg(BH 4 ) 2, starting from the experimental crystal…
The electroluminescence (EL) properties from single-wall carbon nanotube network field-effect transistors (NNFETs) and small bundle carbon nanotube field effect transistors (CNFETs) are studied using spectroscopy and imaging in the near-infrared (NIR). At room temperature, NNFETs produce broad (approximately 180 meV)…
Eu(3+) co-doped Y(2)O(3):Tb nanoparticles were prepared by the combustion method and characterized for their structural and luminescence properties as a function of annealing temperatures and relative concentration of Eu(3+) and Tb(3+) ions. For Y(2)O(3):Eu,Tb nanoparticles annealed at 600 and 1200 °C, variation in th…
(Oxy)nitride phosphors have attracted great attention recently because they are promising luminescent materials for phosphor-converted white light-emitting diodes (LEDs). This paper reports the luminescent properties of (oxy)nitride phosphors in the system of M –Si–Al–O–N ( M = Li, Ca or Sr), and optical properties of…
Early studies have found quasi-reversible magnetization curves in polycrystalline bulk rare-earth iron oxypnictides that suggest either wide-spread obstacles to intergranular current or very weak vortex pinning. In the present study of polycrystalline samarium and neodymium rare-earth iron oxypnictide samples made by…
A method for phase analysis, similar to the Rietveld method in X-ray diffraction, was not developed for electron diffraction (ED) in the transmission electron microscope (TEM), mainly due to the dynamic nature of ED. Nowadays, TEM laboratories encounter many thin samples with grain size in the 1–30 nm range, not too f…
Zinc oxide (ZnO) thin films were electrodeposited from an aqueous zinc acetate solution onto fluorine-doped thin oxide (FTO) coated conducting glass substrates. The effect of organic surfactants like polyvinyl pyrrolidone (PVP), sodium dodecyl sulfate (SDS), polyethylene glycol (PEG), ethylene glycol (EG) and polyviny…
We apply coherent anti-Stokes Raman Scattering (CARS) microscopy to characterize director structures in liquid crystals.
The thermogravimetric, mechanical, and electrical properties of composite sheets produced by infiltrating single-wall carbon nanotube films (also known as 'buckypapers') with polycarbonate solution were characterized. The composite sheets showed improved stiffness and toughness, while the electrical conductivity decre…
The synthesis of a series of thermo-responsive ABA triblock copolymers in which the outer A blocks comprise poly(2-hydroxypropyl methacrylate) and the central B block is poly(2-(methacryloyloxy)ethyl phosphorylcholine) is achieved using atom transfer radical polymerization. These novel triblock copolymers form thermo-…
We have successfully utilized epoxyisophorone ring-opening chemistry to efficiently incorporate the butylthio group to the phenyltetraene bridge of highly efficient nonlinear optical chromophores in high overall yield. By following the guidance of Dewar’s rules, the sulfur atom functions as a moderate π-accepting grou…
We report extensive lattice dynamical calculations of the newly discovered infinite-layer iron oxides SrFeO2 and CaFeO2. For SrFeO2, the parameters of the interatomic potential have been determined to reproduce the zone-centre phonon frequencies reported using ab-initio calculations. Further we have extended the poten…
The aim in this work is to study the influence of nickel content (as-welded state and after stress relief heat treatment) on the microstructure and toughness of CMn weld metals obtained with submerged arc welding. The nickel content vary between 0.50 wt.% and 3.11 wt.%. The microstructures were observed using optical…
A carboxylate-bridged Co(II)–Gd(III) complex, [(bipy)CoL3Gd(NO3)L3Co(bipy)] (HL = α-methylacrylic acid, bipy = 2,2′-bipyridine), was prepared and characterized. Single crystal X-ray analysis reveals that the complex assumes a carboxylate-bridged CoGdCo unit. Magnetic measurements showed χm T decreases when the tempera…
Two drug molecules, Propranolol and Persantin, have been encapsulated by a sol−gel process in an organic−inorganic hybrid matrix by in situ self-assembly. The synthesis parameter, compositions, and pH values in the sol−gel synthesis control the dissolution of the drugs and pore size and distribution of the gels. The n…
This paper presents an experimental investigation on injection molding of wood-plastic composites where the wood constituents are very fine in size (below 50 micron). Moisture and water absorption, MFI values, and shrinkage values were also measured for various wood contents from 40% to 70%. The results indicated that…