Dynamics of supercooled water in highly compacted clays studied by neutron scattering
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Modal method for classical diffraction by slanted lamellar gratings
Slanted lamellar gratings made of dielectric materials are considered, used in conical diffraction mounts. We extend the modal method for slanted lamellar gratings from classical to conical incidence, develop fully generalized Fresnel matrices, and derive energy conservation relations for these matrices. Using the met…
Synthesis of Calibrated Poly(3,4-ethylenedioxythiophene) Latexes in Aqueous Dispersant Media
The synthesis of spherical poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles with a narrow size distribution was achieved in a dispersant aqueous medium. Various oxidants such as ammonium persulfate, iron(III) p-toluenesulfonate, and iron(III) trichloride were tested. A series of end-functionalized poly(ethylene…
Hydroxypropyl Methylcellulose-Controlled Crystallization of Erythromycin A Dihydrate Crystals with Modified Morphology
Crystallization in the presence of pharmaceutically accepted excipients as additives was investigated as a tool for morphological crystal engineering of active pharmaceutical ingredients. Recrystallization of a model drug substance, erythromycin A dihydrate, was carried out by a precipitation technique in the presence…
Fabrication of Calcite Aggregates and Aragonite Rods in a Water/Pyridine Solution
Polymorphs of calcium carbonate (CaCO 3 ) have been easily synthesized in a water/pyridine mixed solvent system under mild conditions without using any other organic additives. The phase transition from pure aragonite to almost pure vaterite, and then to pure calcite, can be nicely captured by the choice of a suitable…
Magnetic behaviour governed by Co spin transitions in LaCo1−xTixO3(0 ⩽x⩽ 0.5) perovskite oxides
Magnetic behaviour governed by Co spin transitions in LaCo1−xTixO3 (0 ⩽ x ⩽ 0.5) perovskite oxides, Álvarez-Serrano, I, Cuello, G J, López, M L, Jiménez-López, A, Pico, C, Rodríguez-Castellón, E, Rodríguez, E, Veiga, M L
Polyhydroxyalkanoate Film Formation and Synthase Activity During In Vitro and In Situ Polymerization on Hydrophobic Surfaces
In vitro and in situ enzymatic polymerization of polyhydroxyalkanoate (PHA) on two hydrophobic surfaces, a highly oriented pyrolytic graphite (HOPG) and an alkanethiol self-assembled monolayer (SAM), was studied by atomic force microscopy (AFM) and quartz crystal microbalance (QCM), using purified Ralstonia eutropha P…
Solid Oxide Fuel Cell System Configurations for Distributed Generation
This paper deals with the determination of the optimal configuration of two integrated systems for distributed energy generation, based on solid oxide fuel cells. Both systems are obtained starting from the Siemens CHP100 generator. The first system is obtained by recovering some of the heat flux available from the fu…
Effects of a metal layer on selective etching of a Ge5Sb75Te20phase-change film
Selective etching between an amorphous and a crystalline phase of a Ge5Sb75Te20 alloy film is carried out with an alkaline etching solution of NaOH. The etching selectivity is dependent not only on the concentration of the etching solution but also on the type of metal layer in the film structure. Specifically, Ag and…
Onset of Ferrielectricity and the Hidden Nature of Nanoscale Polarization in Ferroelectric Thin Films
Using calculations from first principles and the concept of layer polarization, we have elucidated the nanoscale organization and local polarization in ferroelectric thin films between metallic contacts. The profile of the local polarization for different film thicknesses unveils a peculiar spatial pattern of atomic l…
Three Dimensional Single-Walled Carbon Nanotubes
We report a simple fabrication method of creating a three-dimensional single-walled carbon nanotube (CNT) architecture in which suspended CNTs are aligned parallel to each other along the conventionally unused third dimension at lithographically defined locations. Combining top-down lithography with the bottom-up bloc…
Bioinspired Synthesis of Superhydrophobic Coatings
A superhydrophobic material prepared by precipitating calcium phosphate on TiO2 films under in vitro conditions is described. Crystalline calcium phosphate is very porous with octacalcium phosphate as the main phase. The films are made hydrophobic by the surface grafting of a perfluorophosphate surfactant (Zonyl FSE).…
Effect of adsorbates on field emission from flame-synthesized carbon nanotubes
We report the influence of adsorbates on field emission from flame-synthesized patterned carbon nanotubes (CNTs) by varying current–voltage sweep operational modes (continuous and pulsed) and vacuum pressure. Based on the gas adsorption and desorption effect, three distinguishable emission regimes—intrinsic adsorption…
Free Volume Expansion and Nanofoaming of Supercritical Carbon Dioxide Treated Polystyrene
Free volume of polystyrene films treated with supercritical carbon dioxide (SCCO 2) were examined by positron annihilation lifetime spectroscopy. Variation of the free volume sizes after the SCCO 2 treatment due to the release of trapped CO 2 and structural relaxation of the polymer was observed. After 500 h from the…
Effect of Cd/Te Ratio on the Formation of CdTe Magic-Sized Quantum Dots during Aggregation
In this study, the aggregation dynamics of magic-sized CdTe quantum dots is investigated. The experiments show that the growth kinetics of the quantum dots is very sensitive to the Cd/Te ratio. The crossover from tellurium-rich to cadmium-rich conditions produces a very different aggregation pattern, which can be expl…
Biomass Solid Oxide Fuel Cell-Microgas Turbine Hybrid System: Effect of Fuel Composition
Performance analysis of the solid oxide fuel cell-microgas turbine (SOFC-MGT) hybrid system has been made. We assume a fuel composition that is methane based with varying concentrations of other species that are expected to be present in biomass-derived gas streams in preparation for the study of biomass fueled SOFC-M…
Testing the High Spin MnII9WV6 Cluster as Building Block for Three-Dimensional Coordination Networks
Pentadecanuclear high spin cyano-bridged {M′ II 9 M′′ V 6 (CN) 48 (solv) 24 } (M′ = 3d metal ions; M′′ = Mo, W; solv = H 2 O, alcohol) clusters are considered as building blocks for three-dimensional open networks. Self-assembly of Mn II 9 W V 6 clusters ( S = 39/2) with 4,4′-bipyridine leads to their organization int…
Laser Directed Growth of Carbon-Based Nanostructures by Plasmon Resonant Chemical Vapor Deposition
We exploit the strong plasmon resonance of gold nanoparticles in the catalytic decomposition of CO to grow various forms of carbonaceous materials. Irradiating gold nanoparticles in a CO environment at their plasmon resonant frequency generates high temperatures and strong electric fields required to break the CO bond…
Optimization of Plasmonic Enhancement of Fluorescence on Plastic Substrates
In this work, we report on the uniform deposition of tailored plasmonic coatings on polymer substrates and on the distance dependence of the plasmonic enhancement of a fluorescent dye. Silver, gold, and silver/gold alloy nanoparticles (NPs) with a range of diameters were synthesized using chemical techniques and chara…
Typical Ferroelectric Olefin-copper(I) Organometallic Oligmer with Flexible Organic Ligand
Solvothermal treatment of a flexible olefin organic ligand and CuBr offers a novel olefin-copper(I) coordination compound. The induction of the flexible ligand leads the olefin-copper(I) organometallic compound to crystallize in a chiral or polar point group P 4 1 . The investigation of its ferroelectric property show…