Materials Literature
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High-purity carbon nanotubes (CNTs) are produced by chemical vapour deposition of camphor, an environment-friendly hydrocarbon. In a small CVD reactor (1-m long and 26- mm wide), CVD of 3 g camphor at 650°C for 1 hour yields ∼1.62 g MWNTs of diameter ∼10 nm with an as-grown purity over 88%; that is, camphor-to-CNT pro…
A multicathode high current pulsed cathodic arc has been used to deposit Ti2AlC thin films belonging to the group of nanolaminate ternary compounds of composition Mn+1AXn. The required stoichiometry was achieved by means of alternating plasma pulses from three independent cathodes. We present x-ray diffraction and tra…
In the present study, based on a biomimetic approach, novel 3D nanofibrous hybrid scaffolds consisting of poly(epsilon-caprolactone), poly(vinyl alcohol), and chitosan were developed via a multi-jet electrospinning method. The influence of chemical, physical, and structural properties of the scaffolds on the different…
Processes to fabricate tubular solid oxide fuel cells (SOFCs) using various electrolyte and electrode materials have been investigated. Single‐phase perovskite strontium‐ and magnesium‐doped lanthanum gallate (LSGM) was synthesized. Mechanical and thermal properties, and the cell performance of LSGM electrolyte fuel c…
Here we report on systematic studies of the epitaxial growth and properties of Co and Cu codoped ZnO thin films deposited onto sapphire c-plane single crystals using pulsed-laser deposition. The films display ferromagnetic behavior at room temperature. Detailed atomic scale characterization rules out the presence of c…
The layer-by-layer assembly of layered double-hydroxide (LDH) nanocrystals was successfully accomplished by surface grafting using organic acids as coupling agents. The organic acids adsorbed on the crystalline sheet edges of LDH also play a key role in allowing or blocking the intercalation reaction of the multilayer…
Using spectroscopic ellipsometry in the visible and near-infrared spectral range we investigate the optical properties of a growing silver film starting from predeposited gold nanoparticles. The effective pseudodielectric functions, obtained by direct inversion of the ellipsometry spectra, reveal a surface plasmon res…
The CABRI REP-Na program was performed in the sodium loop of the CABRI reactor by the French Institut de Radioprotection et de Sûreté Nucléaire. The objective was to study the behavior of high-burnup UO2 and mixed-oxide (MOX) fuel during a reactivity-initiated accident (RIA) and involved eight tests with UO2 and four…
A tubular anode‐supported “micro‐solid oxide fuel cell” (μSOFC) has been developed for producing high volumetric power density (VPD) SOFC systems featuring rapid turn on/off capability. An electrophoretic deposition (EPD)‐based, facile manufacturing process is being refined to produce the anode support, anode function…
Afro-ethnic hair, when compared with naturally straight hair, presents some important variations such as differences in diameter in many points of the thread, ellipsoidal threads, and low trend of hydrating the scalp thus turning the hair drier, because the natural sebum distribution is irregular along the thread. Thi…
Gold catalysts were prepared on TiO 2 supports of different phase structures (i.e., anatase, rutile and biphasic), TiO 2 crystal size (i.e., 9–23 nm), surface and textural properties (i.e., hydration and surface area). The CO oxidation on the gold catalysts was carried out in an operando-DRIFTS set-up equipped with DR…
The influence of cell size on tensile fracture strength of foamed plastics is examined in this study. Foamed specimens having various cell sizes with the same foaming magnification are molded. The tensile fracture strength of foamed plastics is measured and the relationship between the cell size and tensile fracture s…
Carbon materials are a class of significant and widely used engineering adsorbent. As a new member of the carbon family, carbon nanotubes have exhibited great potentials in applications as composite reinforcements, field emitters for flat panel display, sensors, energy storage and energy conversion devices, and cataly…
Shape persistent perylene diimide (PDI) multichromophores incorporating ethynylene bridges have been synthesized in high yield via palladium-catalyzed Hagihara coupling, which provides compounds with no rotational or constitutional isomerism in contrast to polyphenylene dendrimers. Their excited-state pathways have be…
Thick films of 0-3 composites of lead-zirconate-titanate ceramic and polyvinylidene-trifluorethylene copolymer have been produced by spin coating on gold-coated silicon wafers. The dielectric properties were investigated as a function of ceramic volume fraction and temperature. Pyroelectric measurements were undertake…
Abstract A novel AZ91 Ce containing magnesium alloy characterized by excellent corrosion resistance is fabricated by adding rare earth Ce (cerium) in the form of a Mg‐Ce master alloy. The metallographic investigation shows that Ce added to AZ91 can obviously decrease the size of β‐Mg 17 Al 12 and forms Al 11 Ce 3 inte…
Thin films of CuS (covellite) were deposited onto TCO (SnO 2 :F) glass by Spray Pyrolysis (SP) technique. Aqueous and water:alcohol (ethanol, 1-propanol) solutions of copper(II) chloride and thiourea with different Cu/S molar ratio have been used as precursors. The substrate temperature was varied from 185 °C to 285 °…
Polarized Raman spectroscopy has been used to obtain the room-temperature phonon spectra of the series of rare earth orthovanadate single crystals: SmVO4, HoVO4, YbVO4, and LuVO4. The observed Raman frequencies follow the overall mode distribution expected for REVO4 compounds with the tetragonal zircon structure. The…
Syntheses and characterizations of a Pd-based molecular triangle and square and hybrid composites with polyoxometalates are examined. The equilibrium between the Pd-based molecular triangle [(en*)Pd(4,4'-bpy)]3(NO3)6 and square [(en*)Pd(4,4'-bpy)]4(NO3)8 largely depends on the solvents, and both compounds have success…
Author: Koch, F. et al.; Genre: Journal Article; Issued: 2007; Open Access; Keywords: 11th International Workshop on Plasma-Facing Materials and Components for Fusion Applications (PFMC-11), Greifswald, 2006-10-10 to 2006-10-12; Title: Self Passivating W-based Alloys as Plasma Facing Materials for Nuclear Fusion