Materials Literature
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Scattering cross sections of radiation interactions with matter form the foundation for diagnostic x-ray imaging, nuclear medicine, and radiotherapy. These cross sections are typically presented as numerical charts in medical physics literature or complicated formulas in quantum electrodynamics literature. There seems…
A calorimetric investigation of the synthesized nanotubular hydrosilicates based on compounds of the variable composition (Mg,Ni) 3 Si 2 O 5 (OH) 4 with a chrysotile structure is performed on a Tian-Calvet high-temperature heat-flux microcalorimeter. The enthalpies of formation of the hydrosilicates from elements at a…
This work employs porous silicon as a gas diffusion layer (GDL) in a micro proton exchange membrane fuel cell (μPEMFC) and a micro direct methanol fuel cell (μDMFC). Pt catalyst is deposited on the surface of, and inside, the porous silicon to improve its conductivity. Porous silicon with Pt catalyst replaces traditio…
Atmospheric corrosion involves chemical, electrochemical, and physical processes in three phases (solid, liquid, and gas) and two interfaces (solid/liquid and liquid/gas). Because of inherent experimental and conceptual difficulties, scientific efforts to characterize this highly complex interfacial regime came relati…
In support of the Capillary Flow Experiments (CFE) program, several polymethylmethacrylate (PMMA) flight vessels were constructed. Some vessels used a multipiece design, which was chemically welded together. Due to questions regarding the effects of the experiment fluid (silicone oil) on the weld integrity, a series o…
25α:75β SiAlON composition was designed with different cations and at different molar ratios. Effect of the type of cations both on the composition and the type of intergranular phase investigated after gas pressure sintering and further post sintering heat treatment.
In the present paper, the fabrication and characterisation of typical high temperature Ni(Ti+Hf) alloyed thin films produced by simultaneous sputter deposition from separate elemental Ni, Ti and Hf targets are presented. Film composition, determined by energy dispersive X-ray spectroscopy, was controlled by adjusting…
Abstract The crystallization behavior of semicrystalline PEO homopolymer/triblock PS‐PEO‐PS copolymer blend system, which exhibited “Dry‐Brush” in the melt. A symmetric polystyrene–poly(ethylene oxide)–polystyrene triblock copolymer was blended with PEO homopolymer (h‐PEO) having the same molecular weight as that of t…
Manganese gallium oxide (MnGa 2 O 4 ) one-dimensional nanostructures were synthesized by the thermal evaporation of MnCl 2 /Ga/Zn. The single-crystalline spinel-structured MnGa 2 O 4 nanowires are preferentially grown in the [111] direction. In contrast, the Zn (10%)-doped MnGa 2 O 4 nanostructures adopt zigzag struct…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
The structure and phase composition of La0.65Sr0.35Mn1 − x − y NixTiyO3 manganites (0 ≤ x ≤ 0.3; 0 ≤ x + y ≤ 0.3) obtained by solid-state reactions in air are studied by x-ray diffraction. All the samples are single-phase materials and have an orthorhombic or pseudocubic structure, depending on the chemical compositio…
Abstract A physical self-assembly process based on ac-dielectrophoretic deposition of single-walled carbon nanotubes between metallic electrodes and subsequent gate-voltage controlled elimination of the metallic nanotubes is reported that allows fabrication of multi-tube carbon nanotube field-effect transistors with e…
According to the request of the sensitive wave band of 0.38 mum-0.52 mum of the bionic micro-nano navigation sensor, the paper designed a wire-grid polarizer which can be effectively used in the region of blue-violet light spectrum based on rigorous coupled-wave theory. The difference between the designed wire-grid po…
The paper addresses the influence of diamond-containing mixture and detonation nanodiamonds on the physical-mechanical and physical-chemical properties of polymer composites based on foamed polyurethane, frost-resistant butadiene-nitrile rubbers, polycarbonates, rubbers resistant to explosive decompression, and gas pl…
The anisotropic diffusion in coiled pore systems of SBA-3-type microparticles has been studied by the release of guest molecules. The diffusion turns out as an example of the influence of hierarchical structuring on physical properties. Two modes of diffusion, associated with transport along and across the mesopores,…
The band structures of pure semiconductors CdGeAs2 and CuGaTe2, as well as magnetic semiconductors Cd1 − x Mn x GeAs2 and Cu1 − x Mn x GaTe2 (x = 0.0625), have been calculated by the density functional theory method. In both compounds, the Mn3d orbitals form a narrow band near the Fermi level. In the case of Cd1 − x M…
The conditions for the formation of CuInTe 2 nanoparticles in silicate matrices are studied by means of optical spectroscopy and electron microscopy. The formation of the particles of the semiconductor phase in size from 15 to 30 nm occurs at the stage of cooling of the melt and depends essentially on the composition…
Siliceous spicules of Baikal freshwater sponge Lubomirskia baicalensis contain several proteins, including silicateins. Analysis of a L. baicalensis cDNA library revealed four different mRNAs coding for proteins related to marine sponge silicatein α (α1, α2, α3, and α4). The intron-exon structure was determined forthe…
The effects of chirality and diameter on the electron transport properties of semiconducting, single wall, carbon nanotubes are explored by the Ensemble Monte Carlo method and an iterative solution of the Boltzmann’s transport equation. The results show that the effect of chirality is significant for small diameter tu…