Materials Literature
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This manuscript describes the successful synthesis and characterization of five generations of dendrimers based on melamine. Early generations of these materials appear to be single chemical entities: upon purification, no detectable impurities are observed using NMR spectroscopy, mass spectrometry, and HPLC and GPC a…
This paper presents a model and a structured procedure to optimize the internal structure of a single solid oxide fuel cell (SOFC) so that the power density is maximized. The polarization curve and power density are obtained as functions of temperature, geometry and operating parameters. The internal structure, which…
A classical interatomic force field for hydroxyapatite has been parameterized from periodic ab initio calculations carried out on the hexagonal structure (space group P63). The GULP program has been used for fitting geometry and phonon frequencies computed with the CRYSTAL06 program using the B3LYP hybrid functional a…
Densely packed arrays of magnetic nanowires have been synthesized by electrodeposition filling of nanopores in alumina and titania membranes formed by self-assembling during anodization process. Emphasis is made on the control of the production parameters leading to ordering degree and lattice parameter of the array a…
Lu 2 Fe 17 is a ferromagnet below T C ∼140 K and antiferromagnet up to T N =275 K. Hydrogen absorption leads to a stabilization of the ferromagnetism over the whole range of magnetic order and to an increase of the ordering temperature up to T C =354 K in Lu 2 Fe 17 H. The external pressure compensates the lattice exp…
Physical and chemical properties of plasma-polymerized films were investigated using ring-type siloxane monomers with several kinds of side-chain chemicals, and a design principle of the material and plasma-process was derived to obtain a porous film of with sub-nanometer-scaled porous structure framed by the original…
Polymer matrix composites with multi-wall carbon nanotube (MWNT) filler improve the thermo-mechanical and electrical properties of the host material. The high electrical conductivity of MWNT induces a low percolation threshold in the polymer to produce electrically conductive epoxies at loadings of less than 10 wt% MW…
Behavior and mechanisms of degradation of thermosetting plastics used as FRP-matrix and GFRP in liquid environments are reviewed based on our experimental findings. The forms of chemical degradation were classified into three types, 'surface reaction type,' 'corrosion layer forming type' and 'penetration type.' The me…
For electrical devices based on vanadium dioxide thin film, various methods have been implemented on the electrical gating of the devices. In this paper, a photo-assisted electrical gating in a two-terminal device is demonstrated based on vanadium dioxide thin film, instead of a three-terminal device with a gate termi…
Umbilical cords are usually discarded after delivery, even though they contain a set of functional vessels. We investigated whether the human umbilical vein (HUV) is suitable as a storable scaffold for the tissue engineering of small-caliber vessel grafts. Isolated HUVs were cryopreserved by freezing or vitrification.…
The development of nanometer-scale devices operating under a new principle that could overcome the limitations of current semiconductor devices has attracted interest in recent years. We propose that nanoionic devices that operate by controlling the local transport of ions are promising in this regard. It is possible…
The interface in a composite crystal made by 3-D epitaxial growth of crystalline layers on a seed crystal was studied by both TEM and FIB/STEM microscopies which revealed a diffuse interface between the two isostructural phases extending over ca. 0.7 µm.
The reactivity of zinc in sodium hydroxide electrolytes containing sodium silicate and sodium tetraborate was studied by electrochemical and microstructural examinations. Impedance measurements indicate that a porous surface layer is formed on zinc immersed in sodium hydroxide at its open circuit potential and on pola…
The precursors [In(bipy)(SC{O}Ph)3] and [Ag(SC{O}Ph)] have been used to prepare monodispersed polyhedral shaped AgInS2 nanocrystals (NCs). The NCs were fully characterized by X-ray powder diffraction, transmission electron microscopy, selected area electron diffraction and energy dispersive X-ray analysis. The synthes…
Abstract The interactions of linear hydrocarbons C 2 n H 4 and C 2 n H 2 ( n = 1–4) with a finite‐length armchair (5,5) single‐walled carbon nanotube have been investigated using HF and MP2 methods in conjunction with 6‐31G(d) basis set, and molecular mechanics (MM) with MM2 force field. In all cases, the results obta…
A series of superhydrophobic surfaces with micro/nanostructure have been successfully achieved by a simple process via the reaction between metal (such as Cd and Zn) salts and alkanethiolates.
This chapter describes the practical details involved in the successful sectioning of plastic-embedded specimens for electron microscopy. The focus will be on those parts of the process that are really key to the successful sectioning of any biological material, i.e., the proper shape and size of the specimen, sharp k…
The two-step potentiostatic anodizing process of a 1050 aluminum alloy (AA1050) in an oxalic electrolyte was studied. Special attention was paid to the effect of the applied anodic voltage on the dimensions, homogeneity, and order of the anodic alumina porous layer obtained after a second step. The experimental condit…
The most commonly used solid oxide fuel cell (SOFC) anode material is a two-phase, nickel- and yttria-stabilized zirconia cermet. During fuel cell operation, this material is exposed to a reducing environment and thus remains a cermet; however, the metallic component of the anode may reoxidize in a commercial SOFC sys…
The Keggin type 12-molybdophosphoric acid is modified by incorporation of vanadium and iron and studied for oxidation of various alcohols using molecular oxygen as oxidant. The molybdophoshoric acid catalyst containing both vanadium and iron is highly active compared with the catalysts containing either vanadium or ir…