Materials Literature
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The surface wetting of five biopolymers, used as coating materials for a plastic film, was monitored over a span of 8 min by means of the optical contact angle technique. Because most of the total variation was observed to occur during the first 60 s, we decided to focus on this curtailed temporal window. Initial cont…
Abstract This paper addresses the oxidation mechanism of glycerol on Au and Pt electrodes under different pH conditions. Intermediates and/or reaction products were detected by using an online high‐performance liquid chromatography technique (for soluble products) and online electrochemical mass spectrometry (for CO 2…
Recent first-principles studies of point defects in ZnO are reviewed with a focus on native defects. Key properties of defects, such as formation energies, donor and acceptor levels, optical transition energies, migration energies and atomic and electronic structure, have been evaluated using various approaches includ…
The title compound, [Cu(5-Mesal) 2 (denia) 2 (H 2 O) 2 ] (5-Mesal = 5-methylsalicylato, denia = N , N -diethylnicotinamide) crystallizes in the triclinic unit cell. Crystal structure was solved from the laboratory powder diffraction data. Each copper(II) atom is situated on an inversion centre and is coordinated by tw…
Sb2O3 submicron rod arrays were fabricated by carbothermal reduction method using antimony doped tin oxide (ATO) nanoparticles and graphite powder as source materials. The obtained products were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron mi…
In this study, temperature profiles and combustion velocities of a Zn + S system in the presence of sodium halide (SH) as an inert diluent were investigated by combining combustion experiments with the thermocouple measurement technique. Flammability limits were determined experimentally by determining the limiting co…
Amonia borane (AB) has been identified as a potential candidate high-capacity hydrogen storage material. This work probes the adsorption and dissociation of AB inside and outside single-walled carbon nanotubes (SWCNTs) within the framework of density functional theory. The dissociation barriers of AB have been calcula…
The mesophases of two infinitely hard models with chiral and anisotropic characteristics in two dimensions are studied. Evidence for nematic and smectic behavior is provided via Monte Carlo simulations using restrictive values of the molecular parameters. Both models are geometrically chiral; one has polar structure.…
Abstract MoO 3 /γ‐Al 2 O 3 composites are synthesized by CVD under atmospheric pressure using Mo(CO) 6 as the precursor and porous γ‐Al 2 O 3 particles in a horizontal, rotating, hot‐wall reactor, which is also used for calcination in air. The composites are characterized by N 2 physisorption, atomic absorption spectr…
Experimental and theoretical studies based on mass spectrometry, collision-induced dissociation, and ab initio calculations are performed on the formation and stability of FeO(n)(+) clusters, as well as on their structural, electronic, and magnetic properties. In the mass spectra, clusters with an even number of oxyge…
The Northwestern University Initiative for Teaching Nanosciences (NUITNS) at nanohub.org Web site combines several tools for doing electronic structure calculations and analyzing and displaying the results into a coordinated package. In this article, we describe this package and show how it can be used as part of an u…
Abstract Polyimide (PI)/silica hybrid membranes with high contact angles were prepared through the in situ sol–gel process. The precursor, poly(amic acid) with controlled block chain length, was synthesized using 4,4′‐diaminodiphenyl ether (ODA), 3,3′,4,4′‐benzophenone‐tetracarboxylic dianhydride (BTDA) and 3‐aminopro…
Abstract Different strategies for obtaining nanowires (NWs) with ferromagnetic properties using the molecular beam epitaxy (MBE) grown nanostructures combining GaAs and Mn were investigated. Four types of structures have been studied: (i) self‐catalyzed GaAs:Mn NWs grown at low temperatures on GaAs(100) substrates; (i…
First-principles calculations based on density functional theory and strengthened by Hartree–Fock computations have been performed to study a Ga-doped wurtzite-type ZnO crystal. The large 108-atom supercell used throughout this work allows one to model a single point defect within the periodic supercell model. Thus, t…
Ultrathin glycine-water ice films have been prepared in ultrahigh vacuum by condensation of H(2)O and glycine at 90 K on single crystalline alumina surfaces and processed by soft x-ray (610 eV) exposure for up to 60 min. The physicochemical changes in the films were monitored using synchrotron x-ray photoemission spec…
Abstract Poly( L ‐lactide) (PLLA) freeze‐dried from dilute 1,4‐dioxane solutions exhibited very porous structure composed of thin membranes of which the mean thickness was estimated to be 104–135 nm. Heating measurements of differential scanning calorimetry (DSC) showed that the freeze‐dried PLLA (FDPLLA) exhibits an…
Abstract This work focuses on the effect of tackifiers on mechanical and dynamic properties of carbon‐black‐filled vulcanizates. Three types of tackifiers with difference in softening points are selected for study including petroleum resin, phenolic resin, and gum rosin. The effect of tackifiers on the retardation of…
We investigate the quantum-mechanical localization of 1 H and 2 H isotopes in the symmetric low-barrier hydrogen-bonds of potassium dihydrogen phosphate (KDP) crystals in the paraelectric phase. The spatial density distributions of these hydrogen atoms are suspected to be responsible for the surprisingly large isotope…
Highly ordered, uniform Cu 7 S 4 hollow cubes have been successfully synthesized in a mild, low-temperature condition from freshly prepared solid Cu 2 O cubes. Cu 2 O cubes have been synthesized at ∼80 °C, exploiting the water-soluble Cu(II)–EDTA complex (λ max = 730 nm) as precursor and glucose as reducing agent unde…
In this study, we report fabrication and characterisation of a nanocomposite system composed of a commercial resin and extremely small (several nanometres in diameter) titanium dioxide particles. Nanoparticles were synthesised in situ with particle nucleation occurring inside the resin matrix. In this nanodielectric f…