Materials Literature
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We have fabricated spherical La(FexSi1−x)13 compounds by a rotating electrode process (REP) to provide suitable refrigerants for active magnetic regenerator (AMR)-type systems. In the as-prepared state, the cross section exhibits a dendritic metallographic structure composed of two phases of α-Fe-based alloy with Si a…
We present the complete formalism that describes scattering in graphene at low energies. We begin by analyzing the real-space free Green's function matrix and its analytical expansions at low energy, carefully incorporating the discrete lattice structure, and arbitrary forms of the atomic-orbital wave function. We the…
The effect of a randomly fluctuating gap, created by a random staggered potential, is studied in a monolayer and a bilayer of graphene. The density of states, the one-particle scattering rate, and the transport properties (diffusion coefficient and conductivity) are calculated at the neutrality point. All of these qua…
Photoemission data taken with hard x-ray radiation on cleaved single crystals of the barium parent compound of the $M{\text{Fe}}_{2}{\text{As}}_{2}$ pnictide high-temperature superconductor family are presented. Making use of the increased bulk sensitivity upon hard x-ray excitation, and comparing the results to data…
The BaFe12O19 ferrite and BaTiO3 ceramic nanoparticles were synthesized by sol-gel method, respectively. In order to involve the different functional materials and to improve the packaging density of devices using low temperature cofired ceramic technology, different content Bi2O3⋅B2O3⋅SiO2⋅ZnO as the sintering additi…
Various reaction parameters of the graft copolymerization of Hibiscus sabdariffa fiber with methyl acrylate as principal monomer and its binary mixture with acrylonitrile, acrylic acid, and acrylamide were optimized. The graft copolymers obtained were characterized by XRD, TGA-DTA, SEM, and FT-IR techniques and were e…
To examine the mechanisms for capillary condensation and for capillary evaporation in porous glass, we measured the hysteresis critical points and desorption scanning curves of nitrogen in four kinds of porous glasses with different pore sizes (Vycor, CPG75A, CPG120A, and CPG170A). The shapes of the hysteresis loop in…
Surface modification through implanting functional groups has been demonstrated to be extremely important to biomedical applications. The usage of organic polymer phase is often required to achieve satisfactory results. However, organic surfaces usually have poor chemical reactivity toward other reactants and target b…
Abstract In order to promote better understanding of the structure‐mechanical properties relationships of filled thermoplastic compounds, the molecular orientation and the degree of crystallinity of injection molded talc‐filled isotactic polypropylene (PP) composites were investigated by X‐ray pole figures and wide‐an…
A method of in situ formation of patterns of size controlled CdS nanocrystals in a polymer matrix by pulsed UV irradiation is presented. The films consist of Cd thiolate precursors with different carbon chain lengths embedded in TOPAS polymer matrices. Under UV irradiation the precursors are photolyzed, driving to the…
The surface effect on the peculiar dynamic and thermodynamic properties of supercooled water, such as the density, has been puzzling the scientific community for years. Recently, using the small angle neutron scattering method, we were able to measure the density of H(2)O confined in the hydrophobic mesoporous materia…
A well-established ion attachment mass spectrometer (IAMS) is combined with an in-house single-atom infrared image furnace (IIF) specifically for thermal analysis studies. Besides the detection of many chemical species at atmospheric pressure, including free radical intermediates, the ion attachment mass spectrometer…
Superparamagnetic nanoparticles were encapsulated in liposomes prior to the stepwise adsorption of polyelectrolytes of opposite charges commonly known as the layer-by-layer (LbL) technique. Magnetic fields allow a fast separation of coated liposomes from unbound polyelectrolytes. The coated particles were characterize…
Silkworms can produce strong and tough fibers at room temperature and from an aqueous solution. Therefore, it seems useful to study the mechanism of fiber formation by silkworms for development of synthetic polymers with excellent mechanical properties. The rheological behaviors of native silk dopes stored in the silk…
We describe a new way to impart pH-responsive properties to gels of biopolymers such as gelatin. This approach involves the embedding of pH-sensitive nanosized vesicles within the gel. The vesicles employed here are those of sodium oleate (NaOA), a fatty-acid-based amphiphile with a single C18 tail. In aqueous solutio…
Using molecular-dynamics simulations we demonstrate the existence of heat-pulse rectification in carbon nanotube Y junctions. The heat pulse is found to propagate unimpeded from stem to branches, while in the reverse direction there is a substantial reflection back into the branches with significantly reduced transmis…
Ln(OC(6)F(5))(3) form stable, isolable compounds with 1,2-dimethoxyethane (DME). Monomeric (DME)(2)Ln(OC(6)F(5))(3) (Ln = Nd, Er, Tm) adopt seven coordinate structures with two chelating DME and three terminal phenoxide ligands. Both (py)(4)Er(OC(6)F(5))(3) and (THF)(3)Yb(OC(6)F(5))(3) were also prepared and structura…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTPoly(γ-benzyl-l-glutamate) Peptides Confined to Nanoporous Alumina: Pore Diameter Dependence of Self-Assembly and Segmental DynamicsHatice Duran†, Antonis Gitsas‡, George Floudas*‡§, Mihail Mondeshki†, Martin Steinhart∥, and Wolfgang Kn…
The electrical properties of individual ZnO nanowires were investigated for two methods of fabricating nanowire-electrode junctions. The number of carriers in the nanowires was increased by electrostatically doping them by applying a gate voltage. The nanowires were chemically doped by introducing impurities during gr…
The issue of macromolecular exciton delocalization length and fluorescence sensing of energetic materials is investigated and modeled from results of nonlinear optical and time-resolved spectroscopy. By using two- and three-photon absorption techniques the fluorescence quenching effects of an organic dendrimer for sen…