Materials Literature
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Layer-by-layer (LBL) multilayer films have been constructed from multiple hydroxyl group directly modified single-walled carbon nanotubes (single-walled carbon nanotubols, SWNTols) and light-sensitive diazoresin (DR). Ultraviolet–visible (UV–vis) absorbance spectra confirm that the alternate assemblies of SWNTols and…
Abstract In grassland farming, especially on coarse‐textured soils, K can be a critical element. On these soils, the actual K management as well as fertilizer history to a large extent determine the leaching of K. The effects of four fertilizer regimes on the nutrient balances and leaching of K from grassland grown on…
Single crystals of the potassium salt K3(H2O)4[H2SiVW11O40](H2O)8+x of the vanadium monosubstituted alpha-Keggin dodecatunsgstosilicate were grown from an aqueous solution and analyzed by EDS, XRD, vibration and electronic spectroscopy, and 1H, 51V, and 29Si solid-state NMR spectroscopy. Results indicate the formation…
Abstract Xyloglucan (XG), a water‐soluble food grade polysaccharide is reported as a substrate for the graft copolymerization of acrylonitrile (AN). XG was extracted from tamarind seed mucilage. Polymerization was initiated both by ceric ion in aqueous medium under N 2 atmosphere and with microwave (MW) irradiation. T…
A 195Pt NMR spectroscopy study of the speciation of [PtCl6]2-, [PtBr6]2-, and the mixed [PtCl6-mBrm]2- (m=0-6) anions in aqueous medium after hydroxide ion substitution of coordinated halide ions has been carried out under dynamic conditions. Of the 56 possible [PtCl6-m-nBrm(OH)n]2- (m, n=0-6) complex anions in soluti…
Copper‐containing, binary, Zn‐phosphate glasses were melted under reductive conditions. The profile of their optical spectra and their color change drastically when the ZnO content of the host is modified. An increase in the host's ZnO concentration tilts the copper oxidation state's equilibria toward the reduced spec…
Polymer Dispersed Liquid Crystal (PDLC) films, of which the liquid crystal has negative dielectric anisotropy, were prepared from the phase separation between liquid crystal (MJ001317) and the various compositions of resins by common polymerization induced phase separation method. In this work, the effects of resin co…
Metal catalyst used in the production of single-walled carbon nanotubes (SWNTs) can be effectively removed from the as-grown nanotubes by an in situ chelation/supercritical fluid carbon dioxide extraction method. A pretreatment procedure using bulk electrolysis with ethylenediaminetetraacetic acid significantly improv…
Abstract Self‐reactive decompositions associated with the exothermic behavior of tert‐butyl hydroperoxide (TBHP) solutions with three diluents of H 2 O, tert‐butanol, and nonane were investigated. We used two calorimeters, Differential Scanning Calorimeter and Vent Sizing Package 2, to characterize the inherent therma…
In this paper, we report a machinable Ti 3 SiC 2 /hydroxyapatite (HAp) composite prepared by spark plasma sintering. The experimental results of a drilling test demonstrated that the composites exhibit excellent machinability when the Ti 3 SiC 2 content is higher than 20 vol%, which can be attributed to the improvemen…
We have studied the lamellar orientation in thin films of a model diblock copolymer, symmetric poly(styrene)- b -poly( l -lactide) (PS−PLLA), in the melt state on supported silicon wafer surface. In this system, while the PLLA block prefers to wet the polymer/substrate interface, the polymer/air as well as polymer/pol…
Photoluminescence (PL) properties of the peanutlike ZnO microrods synthesized by a hydrothermal method were studied in the temperature range of 8−300 K. UV, violet, and green peaks, which exhibit blue, S-shaped (red−blue−red), and redshifts, respectively, and the intensity decrease, with an increase of the test temper…
Nanoparticles can be synthesized from metal-organic or organometallic precursors, either by classical thermal decomposition, ultrasound activation, photolysis as well as hydrogenation or hydrolysis reactions. The size, size distribution and more importantly surface state of these nanoparticles are much better controll…
We demonstrated through electron microscopic characterizations that the semi-hexagonal Au nanoparticle arrays supported on solid surfaces prepared by a polymer template approach could be enlarged uniformly by using a solution-based seed-mediated growth. The semi-hexagonal particle arrangement is largely retained after…
The optical and electro-optical properties of the optically isotropic liquid crystalline composites prepared by in-situ photo-polymerization of cross-linking monomers in the isotropic phase and the blue phase of the chiral liquid crystals were investigated. In the composites prepared in the isotropic phase, no typical…
This paper reports on an EPR and catalytic study of a novel [Fe-porphyrin] catalyst, [FeR4P], used for the catalytic decomposition of pentacholorophenol (PCP). The porphyrin complex [FeR4P] bears 2,6-di-tert-butylphenols (where R = di-ButPhen) at each meso-aryl position of the porphyrin ring. The FeR4P-SiO2 catalyst w…
High-intensity light from a laser pulse can produce laser-induced breakdown in a liquid followed by a shock wave and the growth of a cavitation bubble. When the bubble reaches its maximum radius, the pressure of the surrounding liquid causes it to collapse; this results in bubble oscillations. The cavitation bubble's…
Anharmonic effective pair potentials and effective local force constants have been studied for fcc metals, assuming an interaction Morse potential and taking into account the influence of nearest neighbours of absorber and backscatterer atoms. Analytical expressions for the first three extended X-ray absorption fine s…
The water vapour permeability of textile fabrics is a critical determinant of wearer comfort. Existing test methods are either time consuming or require large amounts of material. A new test apparatus was developed for characterizing the water vapour permeability of fabrics. An aluminium cylinder covered with waterpro…
ADVERTISEMENT RETURN TO ISSUEPREVNoteCrystal Orientation within Lamellae-Forming Block Copolymers of Semicrystalline Poly(4-vinylpyridine)-b-poly(ε-caprolactone)Ya-Sen Sun, Tsai-Ming Chung, Yi-Jing Li, Rong-Ming Ho, Bao-Tsan Ko, and U-Ser JengView Author Information National Synchrotron Radiation Research Center, Hsin…